| Effects of Magnetic Receiver Unit (MRU) Installation on the Blunt Impact Protection of the HGU-56/P Aircrew Integrated Helmet System (AIHS) |
Dec-2009 |
|
| Authors:
Frederick Brozoski; James Lindsey; Shean Phelps; Kimberly Vasquez; Katie Logsdon; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL WARFIGHTER PROTECTION DIV
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 | The AH-64 Apache helicopter currently utilizes an electro-optical system for tracking gunner and pilot head motion. A critical component of this system is the Integrated Helmet and Display Sighting System (IHADSS) helmet. As part of the current Block III upgrade, Apache Product Management Office has opted to adapt the HGU-56/P Aircrew Integrated Helmet System (AIHS) to accept and utilize a Magnetic Receiver Unit to replace the current tracking system. The ... |
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| Development of a Nonlinear 6-Degree of Freedom Miniature Rotary-Wing Unmanned Aerial Vehicle Software Model and PID Flight Path Controller Using MathWorks Simulink Simulation Environment |
Sep-2009 |
134 pages |
| Authors:
Ricardo E Miranda; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
 | This paper describes the development of a 6-degree of freedom (6-DOF), nonlinear, miniature rotary-wing unmanned aerial vehicle (RW UAV) simulation environment using MathWorks Simulink simulation software. In addition to the modeling process, this research also conducts flight-path controller design using Proportional Integral Derivative (PID) control. This model's development is motivated by the desire to enable a rapid prototyping platform for design and implementation of various flight control techniques with further ... |
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| An Evaluation and Development Environment for an ARM7-Based Autopilot Using the Atmel SAM7S256 Microcontroller |
Aug-2009 |
18 pages |
| Authors:
Justin L Shumaker; Ainsmar X Brown; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD VEHICLE TECHNOLOGY DIRECTORATE
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| This report provides a detailed procedure for interfacing an Atmel SAM7S256 board with a Linux-based PC. The environment and interface are related to a new autopilot project that is designed around the ARM7 architecture used within the U.S. Army Research Laboratory's Vehicle Technology Directorate. An example project is also discussed as a means to see how the environment operates. |
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| An Examination of the MH-60S Common Cockpit from a Design Methodology and Acquisitions Standpoint |
Jun-2009 |
137 pages |
| Authors:
Peter A Corrao; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Over the last two decades, cockpits have migrated from the traditional analog gauges of moving dials to computer displays representing an assortment of flight data. To keep in stride with this modernization trend, the U.S. Navy determined that the newest rotary-wing fleet aircraft, the MH-60S and MH-60R, would incorporate these advanced cockpit designs. This program was named Common Cockpit. Using structured interviews with current Navy MH-60S pilots, and analysis of ... |
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| Onboard Stability Control System for a Flapping Wing Nano Air Vehicle |
24-Apr-2009 |
24 pages |
| Authors:
Jason Geder; NAVAL RESEARCH LAB WASHINGTON DC
|
| This paper describes the design and development of a feedback system for controlling the dynamics of a flapping wing nano air vehcile (NAV). A model of the vehicle dynamics and models of sensors and unique actuator mechanisms are built. An extended Kalman filter is designed to eliminate the effects of sensor bias on state estimation. Results of this study demonstrate stability and yield responses that are approaching desired performance capabilities. ... |
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| Developing a Framework for Control of Agile Aircraft Platforms in Autonomous Hover |
Mar-2009 |
75 pages |
| Authors:
Kyle J Krogh; WASHINGTON UNIV SEATTLE DEPT OF AERONAUTICS AND ASTRONAUTICS
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| This thesis extends previous work on autonomous agile aircraft to develop a framework for control in both linear and non-linear flight profiles. Two dynamical systems are considered, a scale YAK-54 aerobatic remote control aircraft and the Flexrotor concept developed by Aerovel. Both models are capable of hover and level flight, requiring complex control transitions between the flight regimes. Linear controllers are developed for both models in a hover configuration. Open-loop ... |
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| Adaptive Control Of Woofer-Tweeter Adaptive Optics |
Mar-2009 |
82 pages |
| Authors:
Jimmie J Perez; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Adaptive optics applies advanced sensing and control to improve the ability of optical systems to collect images through a turbulent atmosphere. The results of this research effort demonstrate that the combination of two recent approaches improves the performance of adaptive optics in directed energy and laser communication scenarios. The first approach is adaptive control, which offers improved performance over fixed-gain controllers in the presence of rapidly changing turbulence. The second ... |
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| A Gimbaled Platform for Micro Aerial Vehicle Autopilot Simulation and Calibration |
Mar-2009 |
24 pages |
| Authors:
Justin L Shumaker; Kamal S Ali; Lamarious Carter; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD VEHICLE TECHNOLOGY DIRECTORATE
|
| This report describes a 3-degrees-of-freedom gimbaled platform designed to be used as a hardware in the loop simulator. This platform is designed to aid in the calibration and synchronization of micro aerial vehicles' autopilot components. This platform can also be used as a simulator allowing the autopilot to fly a computer model of the airframe. This allows for the quick and efficient verification of autopilot behavior with different airframes under ... |
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| Computational Fluid Dynamics Studies of a Flapping Wing Nano Air Vehicle (NAV) |
31-Dec-2008 |
51 pages |
| Authors:
Ravi Ramamurti; Jason Geder; William C Sandberg; NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR REACTIVE FLOW AND DYNAMICAL SYSTEMS
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| The goal of this project is to develop a Nano Air Vehicle (NAV) with a wing span of 7.5 cm. The computational fluid dynamics study is focused on the aerodynamic efficiency of the wings. The primary focus of the computational study is on the aerodynamic performance of the wings in order to obtain a near optimal kinematics of the wing while the NAV is in a hover mode. The secondary ... |
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| Differential Global Positioning System (DGPS) for Flight Testing (Global Positioning System Differentiel (DGPS) pour les Essais en vol) |
Oct-2008 |
182 pages |
| Authors:
Roberto Sabatini; Giovanni B Palmerini; ITALIAN AIR FORCE POMEZIA (ITALY)
|
| In this volume, the potential of Differential Global Positioning System (DGPS) as a positioning datum for flight test applications is thoroughly discussed. Current technology status and future trends are investigated to identify optimal system architectures for both the on-board and ground station components, and to define optimal strategies for DGPS data gathering during various flight testing tasks. Limitations of DGPS techniques are analyzed, and various possible integration schemes with other ... |
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| Aircraft Free-Space MIMO Wireless Communications (Preprint) |
01-Sep-2008 |
13 pages |
| Authors:
Michael Gans; John Matyjas; Michael Medley; Stephen Reichhart; Jared Feldman; AIR FORCE RESEARCH LAB ROME NY INFORMATION DIRECTORATE
|
| In Airborne Networks, because of the high mobility, a communications link is typically available for only a short period of time. Thus it is desirable to communicate at as high a data rate as possible to complete one's information transfer in the available time. High data rate suggests the use of MIMO communications, multiplexing many messages over the link by using multiple antennas at each end of the link. However, ... |
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| Technology Maturation Planning for the Autonomous Approach and Landing Capability (AALC) Program |
Sep-2008 |
21 pages |
| Authors:
Carol Ventresca; Bob McCarty; Ken Eizenga; Justin Rufa; Doug Zimmer; Guy French; John Koger; Doyle Walker; SYNGENICS CORPORATION DELAWARE OH
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| This briefing presents the framework of the technology maturation plan (TMP) for the Autonomous Approach and Landing Capability), then looks at different aspects and dimensions. Lessons learned are reviewed along with pointing to the path ahead. |
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| Miniature Rotorcraft Flight Control Stabilization System |
30-May-2008 |
39 pages |
| Authors:
Nathan Slegers; ALABAMA UNIV IN HUNTSVILLE
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| Attitude determination algorithms for a small rotorcraft are proposed and compared. The first algorithm is based on the well known QUEST algorithm used for spacecraft and satellites Due to large vibration in sensors a pseudo-measurement is developed from gyroscope measurements and rotational kinematics. The pseudo-measurement is used within QUEST to smooth attitude estimations A second simple gyro-compensated tilt sensor and compass is proposed and compared to the optimal QUEST solution. ... |
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| Clearing up the Clutter |
Jan-2008 |
4 pages |
| Authors:
Melissa R Beck; Maura C Lohrenz; Michael E Trenchard; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS MAPPING CHARTING AND GEODESY BRANCH
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| Article gives a brief history of military cockpit displays, and highlight the research taking place to enhance future moving map capabilities. |
|
| CrossTalk: The Journal of Defense Software Engineering. Volume 20, Number 12 |
01-Dec-2007 |
33 pages |
| Authors:
Lloyd Huff; Alison A Frost; Gordon Evans; Drew Hamilton; Derek Sanders; Stephen Torri; George Novak; Capers Jones; Yun-Tung Lau; Michael J Campo; SOFTWARE TECHNOLOGY SUPPORT CENTER HILL AFB UT
|
| CONTENTS: 1) Geriatric Issues of Aging Software by Capers Jones: Capers Jones discusses the need of every company to evaluate and consider best practices for maintenance and to avoid common worst practices. 2) Performance-Based Software Sustainment for the F-35 Lightning II by Lloyd Huff and George Novak: This article describes some of the revolutionary conclusions and products of an analysis of the sustainment for the F-35 and provides a look ... |
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| Propagating A*: Searching State Graphs in Order to Find a Valid Instrument Approach Configuration |
SEP 2007 |
85 pages |
| Authors:
Trent L. Bottin; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The helicopter community has consistently been overlooked in the development of the National Airspace System. The unique flight characteristics of these aircraft make them ideally suited for a wide range of missions that are critical to national defense, medical first response and disaster relief. Full exploitation of these capabilities is limited during inclimate weather because the existing airspace plan was developed around fixed wing aircraft. More specifically, the Federal Aviation ... |
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| Optimal Aircraft Routing in a Constrained Path-Dependent Environment |
SEP 2007 |
57 pages |
| Authors:
III Karczewski Norbert J.; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In this thesis, we present a method of automatically generating a route of flight for an aircraft, or a group of aircraft flying in formation, from an origin to a destination in the presence of threats. The threats encountered at a point of the route are a function of the route used to arrive there. The route is constrained by limits on one or more resources, such as fuel and ... |
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| Collaborative Autonomous Unmanned Aerial - Ground Vehicle Systems for Field Operations |
31-Aug-2007 |
29 pages |
| Authors:
Kimon P Valavanis; UNIVERSITY OF SOUTH FLORIDA TAMPA
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| A heterogeneous UAV-UGV system with adaptable operational procedures/protocols for asset coordination, cooperation, decision-making, efficient communication and processing between its assets, meeting mission objectives is modeled and evaluated experimentally, by simulation and using prototype systems. The research has resulted in i) Development of a processing system for UGVs/UAVs that incorporate an on-board processing vision systems using low cost and highly adaptable motherboards meeting strict payload capabilities of miniature aerial vehicles and ... |
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| On-Line Trajectory Optimization for Autonomous Air Vehicles |
31-Jul-2007 |
91 pages |
| Authors:
Anthony Calise; Eric Johnson; Shannon Twigg; Tobias Ries; Bong-Jun Yang; J E Corban; GUIDED SYSTEMS TECHNOLOGIES MCDONOUGH GA
|
| Successful operation of next-generation unmanned air vehicles will demand a high level of autonomy. Autonomous low-level operation in a complex environment dictates a need for onboard, robust, reliable and efficient trajectory optimization. In this report, we develop and demonstrate an innovative combination of traditional analytical and numerical solution procedures to produce efficient, robust and reliable means for nonlinear flight path optimization in the presence of time-varying obstacles and threats. The ... |
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| Concept of Operations for the Next Generation Air Transportation System, Version 2.0 |
13-Jun-2007 |
220 pages |
| Authors:
JOINT PLANNING AND DEVELOPMENT OFFICE WASHINGTON DC
|
| The Joint Planning and Development Office (JPDO) is developing a Concept of Operations (ConOps) for the Next Generation Air Transportation System (NextGen). The final version of the ConOps will provide an overall, integrated view of NextGen operations in the 2025 timeframe, including key transformations from today's operations. The development of the ConOps is an iterative and evolutionary process that will encompass the input and feedback of the aviation community. This ... |
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| Lean AISF: Applying COTS to System Integration Facilities |
01-Jun-2007 |
4 pages |
| Authors:
Harold Lowery; WARNER ROBINS AIR LOGISTICS CENTER ROBINS AFB GA
|
| Lean Avionics Integration Support Facility (AISF) is an initiative to introduce Lean concepts and methods to the F-15 AISF. Our strategy includes the use of commercial off-the-shelf (COTS) and open source software where appropriate. In this article, the author briefly describes the AISF and then discusses several examples of using COTS to reduce maintenance costs and improve performance. |
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| Automated Carrier Landing of an Unmanned Combat Aerial Vehicle Using Dynamic Inversion |
JUN 2007 |
118 pages |
| Authors:
Nicholas A. Denison; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Dynamic Inversion (DI) is a powerful nonlinear control technique which has been applied to several modern flight control systems. This research utilized concepts of DI in order to develop a controller to land an Unmanned Combat Aerial Vehicle (UCAV) on an aircraft carrier. The Joint Unmanned Combat Air System (J-UCAS) Equivalent Model was used as the test aircraft. An inner-loop DI controller was developed to control the pitch, roll, and ... |
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| Development of Cursor-on-Target Control for Semi-Autonomous Unmanned Aircraft Systems |
JUN 2007 |
81 pages |
| Authors:
Joshua D. Crouse; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The research presented in this thesis focuses on developing, demonstrating, and evaluating the concept of a Cursor-on-Target control system for semi-autonomous unmanned aircraft systems. The Department of Defense has mapped out a strategy in which unmanned aircraft systems will increasingly replace piloted aircraft. During most phases of flight autonomous unmanned aircraft control reduces operator workload, however, real-time information exchange often requires an operator to relay decision changes to the unmanned ... |
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| Control of a System in the Presence of Flexible Modes |
JUN 2007 |
65 pages |
| Authors:
Eleftherios Manos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The primary research objective is to investigate the control of flexible space structures -- mobile satellite communication systems in particular. Solar-powered satellites require a high level of accuracy in attitude stabilization and large-angle maneuvering. Furthermore, they have to be least sensitive to disturbances affecting the structure, possibly coming from several sources, such as mechanical vibrations due to flexible panels appended to the spacecraft. In this thesis, we address the problem ... |
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| Hover, Transition, and Level Flight Control Design for a Single-Propeller Indoor Airplane |
14-May-2007 |
44 pages |
| Authors:
DANIEL LEVINE; Mario Valenti; Jonathan P How; Adrian Frank; James McGrew; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF AERONAUTICS AND ASTRONAUTICS
|
| This paper presents vehicle models and test flight results for an autonomous fixed-wing airplane that is designed to take-off, hover, transition to and from level-flight modes, and perch on a vertical landing platform in a highly space constrained environment. By enabling a fixed-wing UAV to achieve these feats, the speed and range of a fixed-wing aircraft in level flight are complimented by hover capabilities that were typically limited to rotorcraft. ... |
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| Guidance for Development of a Flight Simulator Specification |
MAY 2007 |
270 pages |
| Authors:
Edward A. Martin; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| A long-standing problem in the acquisition of flight simulators has been the clear communication of requirements through the specification process. There are numerous reasons for this, including obfuscation by technical jargon, fragmentation of requirements within a specification, and a human inclination to adopt `cut and paste' approaches which may reflect the requirements of a precedent system more than those of the current system. In an attempt to address these problems, ... |
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| Automated Aerial Refueling Presentation to 2007 ARSAG Conference (Preprint) |
APR 2007 |
21 pages |
| Authors:
Jacob Hinchman; Daniel Schreiter; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| This presentation was prepared for the 2007 Aerial Refueling Systems Advisory Group (ARSAG) conference to update the status of the Automated Aerial Refueling (AAR) program at the Air Force Research Laboratory. The AAR technology suite has application to both manned and unmanned vehicles. For unmanned vehicles, AAR allows eliminates the tyranny of fuel, allowing unmanned vehicles to be based, deployed, and employed like manned systems. Furthermore as manned mission durations ... |
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| Color Analysis in Air Traffic Control Displays, Part II. Auxiliary Displays |
MAR 2007 |
22 pages |
| Authors:
Jing Xing; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| This report presents the second part of our analysis of color use in Air Traffic Control displays. Part I of the study focused on operational displays, while this investigation focuses on auxiliary information displays with which controllers acquire additional information to make decisions. We chose three frequently used decision-support displays for the analysis. Those are: User Request Evaluation Tool (URET), Traffic Management Advisor (TMA), and Integrated Terminal Weather System (ITWS). ... |
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| Fretting Wear-Resistant, Micro-Arc Oxidation Coatings for Aluminum and Titanium Alloy Bearings (Preprint) |
MAR 2007 |
23 pages |
| Authors:
K. J. Choppy; R. F. Kovar; B. M. Cushman; INFOSCITEX CORP WALTHAM MA
|
| This report was developed under a SBIR contract, and has been released to the public by Infoscitex. Aluminum and titanium alloys are used as replacements for steel in gear boxes of aircraft and helicopters in both military and commercial air vehicles, due to their low density, mechanical strength and thermal conductivity. However, these alloys are susceptible to fretting wear when matched to harder steel surfaces under high loads at elevated ... |
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| Optimal Spacecraft Attitude Control Using Aerodynamic Torques |
MAR 2007 |
91 pages |
| Authors:
Michael L. Gargasz; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis introduces a method of three-axis spacecraft attitude control using only aerodynamic torques. Attitude actuation is achieved using four control panels mounted on the rear of a cubical spacecraft bus. The controller consists of an outer loop using linear state feedback to determine desired control torque and an inner loop to choose appropriate control panel angles. The inner loop uses a Jacobian-based approach to invert the nonlinear relationship between ... |
|
| Australian DefenceScience. Volume 15, Number 2, Winter |
Jan-2007 |
17 pages |
| Authors:
DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION CANBERRA (AUSTRALIA)
|
| CONTENTS: New monitoring tool takes heat off deployed personnel - Personnel working in hot environments must manage their body temperatures to avoid the debilitating effects of heat-induced illness. Closer look into Australian maritime heroism at Gallipoli - DSTO is participating in a marine archaeology project. Cover versus concealment - the crucial difference - DSTO is conducting trials on the ability of various kinds of cover available to infantry in combat ... |
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| Stochastic Constraints for Fast Image Correspondence Search with Uncertain Terrain Model |
2007 |
9 pages |
| Authors:
Michael Veth; John Raquet; Meir Pachter; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The navigation state (position, velocity, and attitude) can be determined using optical measurements from an imaging sensor pointed toward the ground. Extracting navigation information from an image sequence depends on tracking the location of stationary objects in multiple images, which is generally termed the correspondence problem. This is an active area of research and many algorithms exist which attempt to solve this problem by identifying a unique feature in one ... |
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| Predictive Control for a Tail-Sitter UAV. Part 2 |
12 DEC 2006 |
14 pages |
| Authors:
Hugh Stone; Peter Anderson; Peter Gibbens; SYDNEY UNIV (AUSTRALIA)
|
| This report covers a research project to develop a quasi non-linear model predictive control algorithm for a tail-sitter UAV. |
|
| Output Feedback Control and Sensor Placement for a Hypersonic Vehicle Model (Preprint) |
DEC 2006 |
25 pages |
| Authors:
Pete Jankovsky; David O. Sigthorsson; Andrea Serrani; Stephan Yurkovich; Michael A. Bolender; David B. Doman; OHIO STATE UNIV COLUMBUS DEPT OF ELECTRICAL ENGINEERING
|
| This paper addresses issues related to output feedback control, including sensor placement, for a model of an air-breathing hypersonic vehicle. The model presents a number of control challenges, in particular because of strong couplings between the propulsive and aerodynamic forces. Because of the vehicle's low weight, slenderness, and length, the vehicle's flexibility has a large impact on stability and control of the vehicle. Two output feedback control methods are developed. ... |
|
| Intelligent Electronic Navigational Aids: A New Approach |
Dec-2006 |
7 pages |
| Authors:
Costin Barbu; Geary Layne; Maura Lohrenz; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
|
| The smart management of clutter is a key component in designing intelligent, next-generation user interfaces and electronic displays. Intelligent devices can enhance a user's situational awareness under adverse conditions. In this paper we present two approaches to assist a user with target detection and clutter analysis, and we suggest how these tools could be integrated with an electronic chart system. The first tool, an information fusion technique, is a multiple-view ... |
|
| Investigation of Adaptive Control Approaches to Mitigate Shock Impact With Piezoceramics (Armor) |
NOV 2006 |
61 pages |
| Authors:
Marthinus Van Schoor; Jacob Pretorius; MIDE TECHNOLOGY CORP MEDFORD MA
|
| The U.S. Army Research Laboratory sought a Short-Term Analysis Services (STAS) program funded through Army Research Office (ARO) with Mide in the research, design, and development of an adaptive control system to mitigate the shock wave impact on an isolation system during and after a ballistic event. This report documents the initial work performed by Mide. |
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| Flight Display Integration |
18 OCT 2006 |
64 pages |
| Authors:
Guy A. French; Darrel G. Hopper; John M. Reising; Michael P. Snow; BOEING CO SEATTLE WA
|
| This report begins with a discussion of the analysis of the human and display factors relevant to synthetic vision in a military cockpit environment. It then describes the results of studies examining the impact of synthetic vision displays on pilot situation awareness and workload. Concluding remarks on additional factors affecting the use of synthetic vision and a future concept for its implementation are described. |
|
| Flight Display Integration |
OCT 2006 |
64 pages |
| Authors:
Guy A. French; Darrel G. Hopper; John M. Reising; Michael P. Snow; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| This report begins with a discussion of the analysis of the human and display factors relevant to synthetic vision in a military cockpit environment. It then describes the results of studies examining the impact of synthetic vision displays on pilot situation awareness and workload. Concluding remarks on additional factors affecting the use of synthetic vision and a future concept for its implementation are described. |
|
| Color Analysis in Air Traffic Control Displays. Part 1: Radar Displays |
OCT 2006 |
21 pages |
| Authors:
Jing Xing; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| One of the current trends in air traffic control (ATC) display technology is a substantial increase in the use of color. Whereas the advantages of color may seem apparent, little attention has been devoted to potential disadvantages of color use with respect to complex cognitive aspects of the ATC environment. Although controllers use several different displays simultaneously (designed and manufactured by different companies), the Federal Aviation Administration (FAA) has not ... |
|
| Solutions Analysis for Helicopter Brownout |
OCT 2006 |
16 pages |
| Authors:
Lee Anderson; Pete Doty; Manuel Griego; Ken Timko; Brian Hermann; John Colombi; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH CENTER FOR SYSTEMS ENGINEERING
|
| This briefing applies systems engineering to the question of how to safely perform a vertical landing when you can't see outside due to recirculating dust/snow. |
|
| New Trends in Intelligent Electronic Navigational Aids |
Oct-2006 |
7 pages |
| Authors:
Costin Barbu; Geary Layne; Maura Lohrenz; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
|
| The smart management of clutter is a key component in designing intelligent, next-generation user interfaces and electronic displays. Intelligent devices can enhance a user's situational awareness under adverse conditions. In this paper we present two approaches to assist a user with target detection and clutter analysis, and we suggest how these tools could be integrated with an electronic chart system. The first tool, an information fusion technique, is a multiple-view ... |
|
| When Computers Fly, It Has to Be Right: Using SPARK for Flight Control of Small Unmanned Aerial Vehicles |
01-Sep-2006 |
6 pages |
| Authors:
Ricky E Sward; Dan Casey; Mark Gerken; AIR FORCE ACADEMY COLORADO SPRINGS CO
|
| One approach to software assurance is to use an annotated language such as SPARK. For safety critical software programs such as Unmanned Aerial Vehicle flight control software, the risk of software failure demands high assurance that the software will perform its intended function. Using an example from work being done at the U.S. Air Force Academy, this article describes SPARK and the formal process of proving correctness of software implementation. ... |
|
| Progress in Guidance and Control Research for Space Access and Hypersonic Vehicles (Preprint) |
SEP 2006 |
18 pages |
| Authors:
David B. Doman; Michael W. Oppenheimer; Michael A. Bolender; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| Over the past decade, both NASA and the U.S. Air Force have directed significant efforts aimed at reducing the cost of access to space as well as improving the reliability and safety of launch vehicles. From a guidance and control perspective, efforts have focused on the development of fault tolerant autonomous systems that can recover vehicles from failures or damage when physically possible. The state of the art is summarized ... |
|
| A Synthetic Teammate for UAV Applications: A Prospective Look |
AUG 2006 |
24 pages |
| Authors:
Kevin A. Gluck; Jerry T. Ball; Glenn Gunzelmann; Michael A. Krusmark; Don R. Lyon; Nancy J. Cooke; L3 COMMUNICATIONS MESA AZ
|
| This report describes current progress and future plans for research and development in synthetic teammates for applications in training, analysis, and system design for Uninhabited Aerial Vehicle (UAV) operations. Development of these teammates involves the eventual integration of several distinct, yet related, basic and applied research lines, including navigation and orientation in virtual environments, computational cognitive process modeling of aircraft maneuvering and reconnaissance missions, verbal interaction between human operators and ... |
|
| Developing Temporal Markers to Profile Operational Errors |
AUG 2006 |
17 pages |
| Authors:
Julia Pounds; Mark D. Rodgers; Deborah Thompson; Daniel G. Jack; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| A commonly held view is that system and human vulnerabilities, whether they emerge at a common moment or over a situation, can form links in a chain of events resulting in an air traffic operational error (OE). However, this truism has not led to the development of better techniques for profiling this progression. If we generally accept that OEs evolve over time, then OEs have temporal characteristics. By better understanding ... |
|
| A Human Factors Review of the Operational Error Literature |
AUG 2006 |
66 pages |
| Authors:
David Schroeder; Larry Bailey; Julia Pounds; Carol Manning; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| This report reviews available documents concerning research and initiatives to reduce operational errors (OEs). It provides a brief history of OE investigation and reporting. It describes 154 documents published from 1960-2005 and 222 OE reduction initiatives implemented from 1986 to 2005. Materials are classified by (1) type of study and (2) human and other contributing factors (using the JANUS taxonomy). An analysis of the literature identified several consistent findings. OEs ... |
|
| Flight Control of Hypersonic Scramjet Vehicles Using a Differential Algebraic Approach (Postprint) |
AUG 2006 |
23 pages |
| Authors:
Tony A. Adami; J. J. Zhu; Michael A. Bolender; David B. Doman; Michael W. Oppenheimer; OHIO UNIV ATHENS SCHOOL OF ELECTRICAL AND COMPUTER SCIENCE
|
| Trajectory Linearization Control is applied to the longitudinal hypersonic scramjet vehicle model under development at the Air Force Research Laboratory. The algorithm is based on Differential Algebraic Spectral Theory which features a time-varying eigenvalue concept and avoids the use of so-called frozen-time eigenvalues which can lead to unreliable results when applied to time-varying dynamics systems. A trajectory linearization control was first designed for a non-linear, affine, rigid-body model using an ... |
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| Collision Avoidance W-Band FMCW Radars in an Altimeter Application |
AUG 2006 |
|
| Authors:
H. J. Hansen; R. Lindop; D. Majstorovic; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) ELECTRONIC WARFARE AND RADAR DIVISION
|
| The frequency modulated continuous wave (FMCW) radar principle has been used in aircraft radio altimeters to measure height above the surface of the Earth. This paper describes the performance of a typical commercial-off-the- shelf 77 GHz automobile collision avoidance radar that is been adapted for an Unmanned Aerial Vehicle (UAV) altimeter application. A lap top-based, bench-top assembly is described. |
|
| Integrated Flight Control and Flow Control Using Synthetic Jet Arrays (Postprint) |
AUG 2006 |
23 pages |
| Authors:
Yong Liu; Marcus Ciuryla; Miki Amitay; Chiman Kwan; James H. Myatt; Xiaodong Zhang; Zhubing Ren; John P. Casey; OHIO UNIV ATHENS
|
| This document was developed under a SBIR contract. In this paper, a novel integrated flight control and flow control system using synthetic jet arrays is presented. In the proposed system, a novel active flow control actuator, synthetic-jets-instrumented-wingtips were designed to enhance or replace traditional roll control of a specified airplane. Wind tunnel experiments were conducted to obtain the dynamic model of the synthetic-jets-instrumented-wing-tips. A closed-loop active flow control system was ... |
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| Development of a Novel, Two-Processor Architecture for a Small UAV Autopilot System, |
26 JUL 2006 |
47 pages |
| Authors:
Robert Klenke; VIRGINIA COMMONWEALTH UNIV RICHMOND SCHOOL OF ENGINEERING
|
| The potential uses for small UAVs are quite varied and include such applications as targeting and even small weapons delivery to sensing, surveying, and search and rescue. This class of UAVs typically have a gross weight of less than 100 lbs and their limited payload capacity, interior volume, and power supply, place significant constraints on on-board systems, including the autopilot system used to control them. On the other hand, the ... |
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| Characterization of UAV Performance and Development of a Formation Flight Controller for Multiple Small UAVS |
JUN 2006 |
164 pages |
| Authors:
Patrick A. McCarthy; AIR FORCE INST OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The Air Force Institute of Technology's (AFIT) Advanced Navigation Technology (ANT) Center has recently delved into the research topic of small Unmanned Aerial Vehicles (UAV). One area of particular interest is using multiple small UAVs cooperatively to improve mission efficiency, as well as perform missions that couldn't be performed using vehicles independently. However, many of these missions require that the UAVs operate in close proximity of each other. This research ... |
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| Optimal Guidance Command Generation and Tracking for Reusable Launch Vehicle Reentry (Preprint) |
JUN 2006 |
26 pages |
| Authors:
Kevin P. Bollino; Michael W. Oppenheimer; David B. Doman; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL AND ASTRONAUTICAL ENGINEERING
|
| The objective of this work is to develop a robust guidance and control architecture for autonomous reusable launch vehicles that incorporates elements of recent advances in the areas of optimal trajectory generation and reconfigurable control. This work integrates three separately developed methods to form a coherent architecture with the potential to manage control effector failures, vehicle structural/aerodynamic degradation, uncertainty, and external disturbances. Outer-loop guidance commands in the form of body-frame ... |
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| Management of Test Complexity for Emerging Safety Critical Control Systems Program |
26 MAY 2006 |
62 pages |
| Authors:
Dale W. Boren; LOCKHEED MARTIN AERONAUTICS CO FORT WORTH TX
|
| Future safety-critical flight control systems will contain sophisticated software algorithms with advanced functionality to enable autonomous operations. However, significant increases in complexity and volume of critical functions will excessively challenge current Verification and Validation (V&V) practices. Therefore, reducing and/or managing the complexity of systems has a major impact upon the cost and schedule of development, verification and maintenance of current and future safety-critical flight control systems. The current research first ... |
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| Optimal Controller for Turbulent Flow Over an Airfoil |
17 MAY 2006 |
108 pages |
| Authors:
John Kim; CALIFORNIA UNIV REGENTS LOS ANGELES
|
| The objectives of this project are twofold: to develop a detached-eddy simulation (DES) technique for turbulent flows past an airfoil at a high angle of attack, and to explore new control strategies for the separated flow, utilizing modern control theories. A system identification approach is used to construct an approximate linear system model for complex flows. The linear quadratic Gaussian (LQG) control synthesis is then used to design optimal controllers ... |
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| Combined Singularity Avoidance for Variable Speed Control Moment Gyroscope Clusters |
18 APR 2006 |
16 pages |
| Authors:
David J. Richie; Vaios J. Lappas; Sajjad Asghar; Phil L. Palmer; SURREY UNIV GUILDFORD (UNITED KINGDOM)
|
| Variable Speed Control Moment Gyroscopes (VSCMGs), defined by Schaub in [1], effectively applied to combined energy storage and attitude control in [2,3], and further studied by Yoon and Tsiotras in [4,5], can avoid attitude singularities by varying wheel speed. However, this device's key advantage lies in torque amplification via gimballing (i.e. operating in its CMG mode). The primary limitation of this CMG mode, though, is the existence of gimbal-lock singularity ... |
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| Human Factors Implications of Unmanned Aircraft Accidents: Flight-Control Problems |
APR 2006 |
9 pages |
| Authors:
Kevin W. Williams; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| This research focuses on three types of flight control problems associated with unmanned aircraft systems. The three flight control problems are: 1) external pilot difficulties with inconsistent mapping of the controls to the movement of the aircraft; 2) difficulties associated with the transfer of control from one control location to another during the flight; and 3) problems associated the automation of flight control. Specific accidents associated with each type of ... |
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| Control Allocation for Overactuated Systems |
APR 2006 |
9 pages |
| Authors:
Michael W. Oppenheimer; David B. Doman; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| Much emphasis has been placed on overactuated systems for air vehicles. Overactuating an air vehicle provides a certain amount of redundancy for the flight control system, thus potentially allowing for recovery from off-nominal conditions. Due to this redundancy, control allocation algorithms are typically utilized to compute a unique solution to the overactuated problem. Control allocators compute the commands that are applied to the actuators so that a certain set of ... |
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| Formation Flight Control for Aerial Refueling |
MAR 2006 |
280 pages |
| Authors:
Steven M. Ross; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| A controller is designed for an aircraft to autonomously fly formation during aerial refueling. Requirements for a refueling autopilot are stated. A six-degree-of-freedom model is developed for an F-16 lead aircraft and a Learjet LJ-25 wing aircraft. Bare airframe stability of both aircraft is investigated, and stability augmentation is performed. A Matlab Simulink (trademark) simulation is built to reproduce the sensor inputs that will be available to the wing aircraft ... |
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| Characterizing and Controlling the Effects of Differential Drag on Satellite Formations |
MAR 2006 |
127 pages |
| Authors:
James T. Wedekind; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The ability to fly satellites in close formations represents a capability that could revolutionize the way satellite missions are designed in the future. This study examines three of the primary formation flying designs and characterizes the effects that an anomalous satellite with a slightly different cross-sectional area would have on the stability of the formation. Following the characterization of these effects, a controller is implemented to mitigate the cross-sectional area ... |
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| Acquisition Management: Source Selection Procedures for the C-5 Avionics Modernization Program |
28 FEB 2006 |
27 pages |
| Authors:
Paul J. Granetto; Douglas P. Neville; Amy L. Mathews; Lashonda M. Thompson; Michael T. Burger; Lamar Anderson; Michael T. Hepler; Karen M. Borrero; Erin S. Hart; OFFICE OF THE DEPUTY INSPECTOR GENERAL FOR AUDITING OF THE DEPARTMENT OF DEFENSE ARLINGTON VA
|
| Civilians and uniformed officers who are involved in the Air Force acquisition decision-making process should read this report because it identifies issues related to the source selection procedures used by the Air Force in the acquisition of the C-5 Avionics Modernization Program. In November 2004, the Acting Under Secretary of Defense (Acquisition, Technology, and Logistics) commissioned a study to review acquisition-related actions taken by the former Principal Deputy Assistant Secretary ... |
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| Optimal Guidance Command Generation and Tracking for the Reentry of a Reusable Launch Vehicle (PREPRINT) |
JAN 2006 |
|
| Authors:
Michael W. Oppenheimer; David D. Doman; Kevin P. Bollino; AIR FORCE RESEARCH LAB (AFRL/VACA) WRIGHT-PATTERSON AFB OH CONTROL THEORY OPTIMIZATION BRANCH
|
| In this work, optimal outer-loop guidance commands are generated from an off-line reference trajectory and then tracked by a reconfigurable inner-loop control law. The primary motivation for this work is a "stepping-stone" towards online, optimal trajectory generation, footprint determination, and retargeting capabilities in the presence of control effector failures or vehicle structural/ aerodynamic degradation, uncertainty, and external disturbances. The presented guidance and control architecture uses a 6-degree-of-freedom simulation and an ... |
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| Vision-Based UAV Flight Control and Obstacle Avoidance |
JAN 2006 |
12 pages |
| Authors:
Zhihai He; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| In this work, we explore various ideas and approaches to deal with the inherent uncertainty and image noise in motion analysis, and develop a low-complexity, accurate and reliable scheme to estimate the motion fields from UAV navigation videos. The motion field information allows us to accurately estimate ego-motion parameters of the UAV and refine (or correct) the motion measurements from other sensors. Based on the motion field information, we also ... |
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| Aviation Safety in the Rapid Onset, High-G Environment |
JAN 2006 |
19 pages |
| Authors:
Paul Werchen; Robert O'Connor; William Albery; Leah Makley; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| This is a summary of research conducted on the high-G onset Air Force Research Laboratory centrifuge at Brooks City-Base TX. G-LOC and A-LOC research on the centrifuge is summarized. It was found that the G-LOC episode lasts longer than the nominal 24 sec previously described. It was found that pilot performance can be impaired up to EO sec after a G-LOC. No adverse effect of sustained acceleration was observed in ... |
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| A User's Guide to the Technical Training Schoolhouse Model |
Jan-2006 |
100 pages |
| Authors:
Thomas Manacapilli; Bart Bennett; RAND CORP SANTA MONICA CA
|
| Prior RAND research on AETC's management of enlisted training identified a lack of analytic tools to assess changes in the pipeline. That study recommended the development of two models. First, AETC needs a model of an actual schoolhouse system. Second, AETC needs a model of the entire training pipeline, from recruiting to on-the-job training at the operational units. The schoolhouse model grew out of the first recommendation. This document is ... |
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| Adaptive Backstepping With Magnitude, Rate, and Bandwidth Constraints: Aircraft Longitude Control |
2006 |
8 pages |
| Authors:
Jay Farrell; Marios Polycarpou; Manu Sharma; CALIFORNIA UNIV RIVERSIDE DEPT OF ELECTRICAL ENGINEERING
|
| This article presents an adaptive backstepping approach to the longitudinal (gamma;alpha;Q) control of an aircraft that directly accommodates magnitude, rate, and bandwidth constraints on the aircraft states and the actuator signals. The article includes design of the control law, Lyapunov analysis of the stability properties of the closed loop system, and simulation based analysis of the performance. |
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| Validation of the USNTPS Simulator for the Advanced Flight Controls Design Exercise |
01 DEC 2005 |
73 pages |
| Authors:
Sr Jurta Daniel S.; NAVAL TEST PILOT SCHOOL PATUXENT RIVER MD
|
| This thesis explores the fidelity of the ground based simulator used at USNTPS during the Advanced Flight Controls Design exercise. A Simulink model is developed as a test platform and used to compare the longitudinal flight characteristics of the simulator. The model is also compared to the same characteristics of a Learjet in the approach configuration. The Simulink model is modified with the aim of yielding a better training aid ... |
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| Design and Fabrication of a Planar Autonomous Spacecraft Simulator With Docking and Fluid Transfer Capability |
DEC 2005 |
71 pages |
| Authors:
Tracy Shay; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The objective of this thesis is to describe the concept development, design, system integration, and operating procedures for the AUDASS II vehicle (Autonomous Docking and Spacecraft Servicing Simulator). The AUDASS II is an improved follow on design of AUDASS I, developed in September of 2002. The purpose of AUDASS II is to simulate a chaser spacecraft autonomously rendezvousing and docking with a target spacecraft for the purpose of conducting fluid ... |
|
| From Fly Models to Flight Control |
DEC 2005 |
9 pages |
| Authors:
Michael H. Dickinson; CALIFORNIA INST OF TECH PASADENA
|
| In the research covered in this project, we integrated findings from biology to create a bottom-up model of the visual, mechanical, and aerodynamics systems the fruit fly to investigate the above general questions. Couched in the language of control systems, the model allows us to make detailed predictions about fly behavior under a given set of assumptions. Thus, we can simultaneously investigate, on the one hand, the actual strategies employed ... |
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| Comparison of a Typical Electronic Attitude-Direction Indicator with Terrain-Depicting Primary Flight Displays, for Performing Recoveries from Unknown Attitudes: Using Difference and Equivalence Tests |
DEC 2005 |
12 pages |
| Authors:
Dennis B. Beringer; Jerry D. Ball; Kelly Brennan; Sitafa Taite; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| A study was conducted to determine if primary flight displays (PFDs) depicting terrain could be used with a level of safety equivalent to electronic attitude-direction indicators (EADIs) without terrain. Five groups of 8 pilots each flew scenarios in a flight simulator using one of three PFDs (EADI, full-color terrain, uniformly brown terrain) with or without guidance cues. Performances of recoveries from unknown attitudes using the EADI were measured first as ... |
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| Prediction of Swerving Motion of a Dual-Spin Projectile with Lateral Pulsejets in Atmospheric Flight |
NOV 2005 |
30 pages |
| Authors:
Bradley Burchett; Allen Peterson; Mark Costello; OREGON STATE UNIV CORVALLIS
|
| Using the linear theory for a dual-spin projectile in atmospheric flight closed form expressions were obtained for swerving motion under the action of lateral pulsejets. Trajectory results generated by the linear theory equations and a fully nonlinear seven degree-of-freedom dual-spin projectile model agreed favorably. The analytic solution provided a relatively straight forward and computationally efficient means of trajectory estimation which is useful within smart weapon flight control systems. In order ... |
|
| Validation, Verification and Certification of Embedded Systems |
OCT 2005 |
|
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
|
| This report is the final report resulting from the deliberations of the NATO Research Task Group on the Validation, Verification and Certification of Embedded Systems (IST-027/RTG-009). The report discusses the important role of embedded systems in both the civil and military contexts. Given the importance, the validation, verification and certification (VV&C) of such systems are of increasing concern. The report discusses the current landscape of VV&C, expected evolution, and also ... |
|
| Fast Prediction of Wing Rock Onset Based on Computational Fluid Dynamics |
14 SEP 2005 |
40 pages |
| Authors:
Ken Badcock; GLASGOW UNIV (UNITED KINGDOM)
|
| This report results from a contract tasking University of Glasgow as follows: The objective is to develop efficient CFD based techniques for the prediction of wing rock instabilities for a delta wing-body. Two approaches in addition to the basic time marching approach will be investigated. First direct calculation of the Hopf point for the onset of the instability (for a fixed sweep angle the incidence is regarded as the bifurcation ... |
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| Reduced Order Adaptive Controllers for Distributed Parameter Systems |
SEP 2005 |
7 pages |
| Authors:
Naira Hovakimyan; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCEAN ENGINEERING
|
| Our research is primarily focused on the development, analysis and verification of robust adaptive control algorithms for nonaffine-in-control nonlinear systems. In particular, we are interested in the development of methodologies that operate in the presence of sensor noise and provide robustness to modelling and environmental uncertainties, such as a battle damage or a control surface malfunction. Of special interest are design methods that would enable control of distributed parameter systems ... |
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| Spatial Orientation Retention Device - Current Status |
SEP 2005 |
10 pages |
| Authors:
William B. Albery; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
|
| A multi-sensory aircraft attitude tool is described that will allow the pilot to canalize his/her attention and perform out-the-cockpit visual tasks without having to continuously bring his/her vision back into the cockpit to monitor aircraft attitude instruments. Aircraft attitude information currently displayed on head-down displays (HDD) and head-up displays (HUD) is supplemented by tactile cues, audio cues, and helmet-mounted symbology that reinforce attitude information about the state of the aircraft ... |
|
| Neural Network Based Adaptive Flow Control for Maneuvering Vehicles |
SEP 2005 |
34 pages |
| Authors:
J. E. Corban; An Glezer; Anthony Calise; GUIDED SYSTEMS TECHNOLOGIES MCDONOUGH GA
|
| This report documents a phase I STIR effort with the objective of developing and demonstrating effective nonlinear adaptive control of the aerodynamic flow about a dynamic body using a distributed array of synthetic jets for actuation. Design of a wind-tunnel test apparatus is presented. Motion of the model is constrained to two degrees of freedom. A conventional elevator is used to trim the model and change its dynamic characteristics. Position ... |
|
| UAVs and Control Delays |
SEP 2005 |
|
| Authors:
S. C. de Vries; TNO DEFENCE SECURITY AND SAFETY SOESTERBERG (NETHERLANDS)
|
| UAV's (Unmanned Aerial Vehicles) are remotely controlled. Delays in the datalinks are to be expected, potentially influencing the performance of the UAV operator. In this study, we examined literature on sources of delay, their effects on human performance, and potential solutions. Delays turn out in the range of 100 to 1600 ms. A delay of 100 ms usually leads to measurable degradation of human performance. Delays of about 250-300 ms ... |
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| Flight Control and Simulation for Aerial Refueling |
18 AUG 2005 |
|
| Authors:
Atilla Dogan; Shinya Sato; TEXAS UNIV AT ARLINGTON DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| This paper addresses the problem of controlling the receiver aircraft to achieve a successful aerial refueling. For the performance verification of the controller, a new set of nonlinear, 6-DOF, rigid body equations of motion for the receiver aircraft has been derived. The equations are developed using the reference frame as one that is attached to, translates and rotates with the tanker aircraft. Furthermore, the nonlinear equations contain the wind effect ... |
|
| AH-64A Back Up Control System (BUCS) Familiarization Training: Instructor Pilot's Guide for the AH-64 Simulator |
AUG 2005 |
74 pages |
| Authors:
Mike Couch; David M. Johnson; ARMY RESEARCH INST FOR THE BEHAVIORAL AND SOCIAL SCIENCES FORT RUCKER AL ROTARY-WING AVIATION RESEARCH UNIT
|
| The AH-64A Apache helicopter contains an emergency fly-by-wire flight control system, called BUCS, that exists to back-up the mechanical flight control system in the event that this primary system becomes damaged or malfunctions. Aviators must be trained in the operation of this back up control system. This BUCS familiarization training must take place in a simulator, since it is too dangerous and expensive to be performed in the aircraft. The ... |
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| Path Planning by Unmanned Air Vehicles for Engaging an Integrated Radar Network |
AUG 2005 |
17 pages |
| Authors:
Reid A. Larson; Meir Pachter; Mark J. Mears; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
|
| A growing concept in the field of unmanned air vehicles (UAVs) is the idea of using a team of cooperating vehicles to participate in electronic countermeasures, defined here as jamming or deception techniques. A UAV may be tasked to engage a radar using noise jamming to mask its radar return or that of another vehicle. Similarly, a UAV may be assigned to deceive a radar by directing a delayed signal ... |
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| Reference Command Tracking for a Linearized Model of an Air-Breathing Hypersonic Vehicle |
AUG 2005 |
|
| Authors:
Kevin P. Groves; David O. Sigthorsson; Andrea Serrani; Stephen Yurkovich; Michael A. Bolender; David B. Doman; OHIO STATE UNIV COLUMBUS OH COLLABORATIVE CENTER OF CONTROL SCIENCE
|
| The focus of this paper is on control design and simulation for an air-breathing hypersonic vehicle. The challenges for control design in this class of vehicles lie in the inherent coupling between the propulsion system, and the airframe dynamics, and the presence of strong flexibility effects. Working from a highly nonlinear, dynamically-coupled simulation model, control designs are presented for velocity, angle-of-attack, and altitude command input tracking for a linearized version ... |
|
| Numerical Analysis of Free Molecule Micro-Resistojet Performance |
JUN 2005 |
13 pages |
| Authors:
Zeeshan Ahmed; Sergery Gimelshein; Andrew Ketsdever; CALIFORNIA UNIV LOS ANGELES
|
| One of the most crucial requirements of modern space missions is the miniaturization of spacecraft and satellites. The miniaturization is tightly connected with new space technologies promoted by the Air Force, DARPA, and NASA, such as spacecraft formation flying, that implies two or more spacecraft that operate synchronously in a controlled spatial configuration. This, in turn, necessitates the development of new propulsion systems able to deliver precise impulse bits while ... |
|
| Multidisciplinary Analysis and Control of High Performance Air Vehicles |
06 MAY 2005 |
265 pages |
| Authors:
Maj Dean Mirmirani; Chivey Wu; Helen Boussalis; Petros Ioannou; CALIFORNIA STATE UNIV LOS ANGELES
|
| Funds provided through the DoD Infrastructure Support for HBCU/MI grant awarded to California State University, Los Angeles (Cal State LA) by the Air Force Office of Scientific Research (AFSOR) Dynamic Systems and Control on August 2001 were used for development of significant infrastructure of research, competency and capabilities in multidisciplinary modeling and control design of high-performance air vehicles. The investigators established a state-of-the-art research facility at CSULA-the Multidisciplinary Flight Dynamic ... |
|
| Adaptive Laser Beam Control Using Return Photon Statistics |
MAY 2005 |
4 pages |
| Authors:
Susan M. Chandler; NUKOVE SCIENTIFIC CONSULTING LLC RANCHOS DE TAOS NM
|
| This Status Report, satisfying CLIN 000 1AB for the referenced contract, highlights the progress the Nukove Team has made during the second quarter of the Year One effort (1 March 2005-30 May 2005). Susan Chandler has had discussions with Mew Mexico State University, and Gordon Lukesh has talked extensively with NMSU statistician Deva Borah. Susan Chandler has had numerous discussions with Woof Consulting, solving the thorny issue of data sharing. ... |
|
| Development of Formation Flight Control Algorithms Using 3 YF-22 Flying Models |
14 APR 2005 |
223 pages |
| Authors:
Marcello R. Napolitano; WEST VIRGINIA UNIV MORGANTOWN DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| The main objective of this project was to provide a flight demonstration of formation control using UAV research aircraft models. This document will describe the efforts leading to the design, construction, and flight testing of formation control laws using three YF-22 research UAVs designed, built, and instrumented at West Virginia University (WVU). In the selected formation configuration, a radio control (R/C) pilot maintains ground control of the 'leader' aircraft while ... |
|
| High Confidence Reconfigurable Distributed Control |
01 APR 2005 |
44 pages |
| Authors:
Jason Hickey; John Hauser; Richard Murray; CALIFORNIA INST OF TECH PASADENA OFFICE OF SPONSORED RESEARCH
|
| The Caltech/Colorado SEC project developed and tested two major advances in software enabled control: optimization-based control using real-time trajectory generation and logical programming environments for formal analysis of distributed control systems. These two activities, funded under the OCC and HSCC tasks of the SEC, were integrated and tested on the industry-led demonstration using the F-15 and T-33 flight tests. |
|
| Head Tracking for 3D Audio Using a GPS-Aided MEMS IMU |
MAR 2005 |
130 pages |
| Authors:
Jacque M. Joffrion; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Audio systems have been developed which use stereo headphones to project sound in three dimensions. When using these 3D audio systems, audio cues sound like they are originating from a particular direction. There is a desire to apply 3D audio to general aviation applications, such as projecting control tower transmissions in the direction of the tower or providing an audio orientation cue for VFR pilots who find themselves in emergency ... |
|
| Full Capability Formation Flight Control |
FEB 2005 |
204 pages |
| Authors:
Ryan K. Osteroos; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The subject of automatic formation flight control is of current interest to the development of Unmanned Aerial Vehicles (UAV). Previous control approaches have been refined in this work to allow more robust maneuvering and to include a fourth control parameter. The equations of motion for each aircraft as a point mass, expressed in a wind-axis coordinate system, are coupled into differential equations that model the two aircraft system dynamics. Control ... |
|
| Software Enabled Control. Design of Hierarchical, Hybrid Systems |
JAN 2005 |
37 pages |
| Authors:
Claire J. Tomlin; STANFORD UNIV CA DEPT OF AERONAUTICS AND ASTRONAUTICS
|
| The objective of this effort is to develop a hybrid control theory for multiple UAVs. Specifically, to develop: A) A hybrid interface between discrete and continuous systems, B) A coordination algorithm for UAVs with distributed sensors. Application areas are air traffic control and satellite formation flight. 1) Real time hybrid system analysis and controller design, 2) Distributed sensing systems, and 3) Asynchronous control theory. Hybrid design (1) is based on ... |
|
| Neural Network Control of a Parallel Hybrid-Electric Propulsion System for a Small Unmanned Aerial Vehicle |
2005 |
283 pages |
| Authors:
Frederick G. Harmon; CALIFORNIA UNIV DAVIS DEPT OF MECHANICAL AND AERONAUTICAL ENGINEERING
|
| Parallel hybrid-electric propulsion systems would be beneficial for small unmanned vehicles (UAVs) used for military, homeland security, and disaster-monitoring missions. The benefits, due to the hybrid and electric-only modes, include increased time-on-station and greater range as compared to electric-powered UAVs and stealth modes not available with gasoline-powered UAVs. This dissertation contributes to the research fields of small unmanned aerial vehicles, hybrid-electric propulsion system control, and intelligent control. A conceptual design ... |
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| Real-Time Parameter Identification for Self-Designing Flight Control |
2005 |
7 pages |
| Authors:
D. G. Ward; R. L. Barron; M. P. Carley; T. J. Curtis; BARRON ASSOCIATES INC CHARLOTTESVILLE VA
|
| A self-designing flight control system (SDFCS) could provide a cost-effective means for developing controllers for new aircraft by eliminating analyst-intensive design of numerous individual controllers, each optimized for a single flight condition. Additionally, the SDFCS could improve the capabilities of existing aircraft by enhancing control performance in new flight regimes such as high angle-of-attack or post-stall maneuvers. Finally, the SDFCS could automatically reconfigure the control system to account for sudden ... |
|
| A Method for Compensation of Interactions Between Second-Order Actuators and Control Allocators |
2005 |
9 pages |
| Authors:
Michael W. Oppenheimer; David B. Doman; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| Typically, actuator dynamics are ignored when designing flight control allocators for aircraft because the bandwidths of actuators are normally much larger than the frequencies of the vehicle's rigid body modes. Unfortunately, this is not always the case, particularly when dealing with non-aerodynamic surface actuators. Ignoring the interactions between constrained control allocators and actuator dynamics can have serious consequences. In this work, a method, which post-processes the output of a control ... |
|
| Distributed Power System for Microsatellites |
15 DEC 2004 |
16 pages |
| Authors:
E. J. Simburger; D. Rumsey; D. Hinkley; S. Liu; P. Carian; ARMY SPACE AND MISSILE DEFENSE COMMAND HUNTSVILLE AL
|
| The Aerospace Corporation has independently developed a distributed "Ring Bus" electric power system for Picosatellites. This distributed power system architecture is being implemented on a number of upcoming Picosatellite missions. The first implementations of this architecture will be flown on the PowerSphere Flight Experiment and the Pico Satellite Inflatable Reflector Experiment (PSIREX). To date not all Picosatellite missions have attitude control or deployable solar array structures. Solar cells are body ... |
|
| Flight Testing the Automatic Air Collision Avoidance System (Auto ACAS) (CD-ROM) |
08 DEC 2004 |
|
| Authors:
James L. Less; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
|
| ELECTRONIC FILE CHARACTERISTICS: 26 files; .MPG videos and .BMP images. PHYSICAL DESCRIPTION: 1 CD-ROM; 4 3/4 in.; 216 MB and 1 hardcopy technical paper. SYSTEMS DETAIL NOTE: ABSTRACT: The United States Air Force and the Swedish government worked together to develop and demonstrate an Automatic Air Collision Avoidance System (Auto ACAS). The eventual implementation of this system on operational aircraft will accomplish two major goals. First, it will reduce ... |
|
| Inertial Head Tracking for 3D Audio (Project "Sound Advice") |
DEC 2004 |
68 pages |
| Authors:
Jacque M. Joffrion; Frank A. Delsing; Christopher E. Hamilton; Michael D. Presnar; Stuart M. Reed; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
|
| This report presents the results of a limited evaluation of a 3D audio system on board a USAF C-12C aircraft under two system configurations: 3D Audio system coupled to a reference navigation system, and 3D Audio system coupled to an inertial head tracker. Testing began on 14 Oct 2004 and was completed on 2 Nov 2004 after eight sorties. Inertial head tracker angular accuracy when coupled to the aircraft frame ... |
|
| Plasma Control of Separated Flows on Bodies of Revolution at High Angles of Attack |
DEC 2004 |
61 pages |
| Authors:
Boris Y. Zanine; RUSSIAN ACADEMY OF SCIENCES NOVOSIBIRSK INST OF THEORETICAL AND APPLIED MECHANICS
|
| This report results from a contract tasking Institute of Theoretical and Applied Mechanics as follows: This proposal deals with surface discharge plasmas and other plasma devices to quench stall-slip departure due to 1) asymmetric vortex shedding on conical body nose tips, and 2) augment directional control/authority. In spite of the extensive work in this area, limited understanding of the underlying basic physical processes near body nose tips as they pertain ... |
|
| Biological Inspired Direct Adaptive Guidance and Control for Autonomous Flight Systems |
30 SEP 2004 |
49 pages |
| Authors:
J. E. Corban; Cole Gilbert; Anthony J. Calise; Allen R. Tannenbaum; GUIDED SYSTEMS TECHNOLOGIES MCDONOUGH GA
|
| The work at Cornell centered on developing experimental methods to characterize flesh fly pursuit evasions, and resulted in the maturation of effective means to capture the 3-D trajectory, as well as body and head orientation. The data was processed at first by hand, and later using image processing algorithms to develop 3-D visualizations at the track, including the head orientation, and ultimately to map the location of the target on ... |
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| Boundary-Escape Tracking: A New Conception of Hazardous PIO |
SEP 2004 |
26 pages |
| Authors:
William Gray; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
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| Pilot-induced oscillations (PIOs) have vexed many designers, scared many more flyers, and killed more than a few pilots and aircraft. In spite of decades of research and hundreds of lessons learned, hazardous PIOs remain a constant threat during most envelope expansion efforts. PIO prediction has assumed that all PIOs are essentially the same thing; a pilot maintaining a condition couples with the aircraft in a way that drives an oscillation. ... |
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| ONBORD (On-Board Navigation of Ballistic ORDnance): Gun-Launched Munitions Flight Controller |
AUG 2004 |
27 pages |
| Authors:
Michael J. Wilson; Rex A. Hall; Mark Ilg; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| On-board navigation of ballistic ordnance (ONBORD) is a digital flight control system with telemetry support designed for the guidance, navigation, and control of gun-launched munitions. Requirements such as low cost, small size, low power, and high survivability, which exclude traditional flight controllers, are satisfied by the ONBORD system. The electronics consist of a single 1.4-inch printed circuit board that includes the Texas Instruments TMS320F2812 digital signal processor whose microcontroller-like capabilities ... |
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| Methods for Compensating for Control Allocator and Actuator Interactions |
AUG 2004 |
12 pages |
| Authors:
Michael W. Oppenheimer; David B. Doman; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
|
| In this work, a method, which post-processes the output of a control allocation algorithm, is developed to compensate for actuator dynamics. In reaching this objective, it is of great importance to consider the real-world applicability of the approach. In order to obtain an algorithm which can operate in real-time on a typical flight computer, it is pertinent to not add to the complexity of the constrained control allocation algorithm. Likewise, ... |
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| An Adaptive Vision-Based Approach to Decentralized Formation Control |
Aug-2004 |
25 pages |
| Authors:
Anthony J Calise; Ramachandra Sattigeri; Johnny H Evers; GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
|
| In considering the problem of formation control in the deployment of intelligent munitions, it would be highly desirable, both from a mission and a cost perspective, to limit the information that is transmitted between vehicles in formation. In a previous paper, we proposed an adaptive output feedback approach to address this problem. Adaptive formation controllers were designed that allow each vehicle in formation to maintain separation and relative orientation with ... |
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| Robust Control, Feedback and Learning: Data-Driven Methods |
31 JUL 2004 |
6 pages |
| Authors:
Michael G. Safonov; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
|
| The research effort supported under this grant ended 31 July 2004. A highlight of progress during the final fiscal year was a clear theoretical explanation of and solution to. the model mismatch stability problem generally associated with state-of-the-art adaptive control design methods. The source of these model-mismatch instability problems was traced to the implicit use of absolute-error cost functions and/or use of assumption-driven cost functions. These cost-functions were shown via ... |
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| Modeling and Simulation Technologies: Reconfigurable Flight Simulators in Modeling and Simulation |
26 JUL 2004 |
14 pages |
| Authors:
Guy W. Williams; Ken Lawrence; Richard Weeks; TEST WING ( 412TH) EDWARDS AFB CA
|
| The Test and Evaluation Modeling and Simulation (TEMS) facility at the Air Force Flight Test Center (AFFTC), Edwards Air Force Base, California, provides developmental test and evaluation flight test programs with virtual, piloted real-time simulators. The TEMS facility has a requirement to support multiple aircraft programs with high fidelity cockpits and out-the-window visual systems within limited facility space and tight budget constraints. The AFFTC's Modeling, Simulation and Integration (MSI) program ... |
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| MAV State-of-the-Art and Technology Drivers |
23 JUL 2004 |
|
| Authors:
Peter Voersmann; AEROSPACE SYSTEMS BRAUNSCHWEIG (GERMANY)
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| These briefing charts present the state of the art of micro air vehicles (MAVs). These vehicles include those that are unmanned, unattended, and unassisted. MAVs are in increasing use both in the commercial and military sectors. MAVs can be completely remote-controlled, semi-autonomous and able to keep altitude and track while the operator commands up-down or left-right, or fully autonomous in that they can follow waypoints with no operator intervention necessary. ... |
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| Complexity in UAV Cooperative Control |
JUL 2004 |
9 pages |
| Authors:
Phillip R. Chandler; Dharba Swaroop; Jason K. Howlett; Meir Pachter; Jeffrey M. Fowler; AIR FORCE RESEARCH LAB (AFRL/VACA) WRIGHT-PATTERSON AFB OH CONTROL THEORY OPTIMIZATION BRANCH
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| This paper addresses complexity and coupling issues in cooperative decision and control of distributed autonomous UAV teams. In particular, the recent results obtained by the in-house research team are presented. Hierarchical decomposition is implemented where team vehicles are allocated to subteams using set partition theory. Results are presented for single assignment and multiple assignment using network flow and auction algorithms. Simulation results are presented for wide area search munitions where ... |
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| Air Vehicle Technology Integration Program (AVTIP) Delivery Order 0008: Open Control Platform (OCP) Software Enabled Control (SEC) Hardware in the Loop Simulation Program |
JUL 2004 |
41 pages |
| Authors:
Eric Portilla; NORTHROP GRUMMAN CORP EL SEGUNDO CA
|
| These annotated Final Review charts summarize the work performed for the Open Control Platform (OCP) Software Enabled Control (SEC) Hardware in the Loop (HITL) Delivery Order #0008 under the Air Vehicles Technology Integration Program (AVTIP) contract awarded to Northrop Grumman Corporation (NGC). The OCP HITL program developed a Hardware-in-the Loop facility for demonstrating and evaluating High-Confidence Software and Systems (HCSS). Boeing, AFRL, and NGC created and implemented an architecture that ... |
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| Turn Back at the Border - Airlift IMC Operations in Enduring Freedom |
25 JUN 2004 |
81 pages |
| Authors:
Stephen L. Hodge; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research answers the question, "Why weren't airlift instrument meteorological condition (IMC) procedures for key airlift nodes, Bagram and Khandahar, Afghanistan, established from the inception of Operation Enduring Freedom (OEF)?" This is a case study that uses historical data from a variety of sources, including interviews of key participants, and covers the time from crisis action planning just after 11 September 2001, until airlift instrument procedures for Afghanistan were approved ... |
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| Development of a High-Precision Sensor for the Attitude Determination of the Bifocal Spacecraft Simulator |
JUN 2004 |
119 pages |
| Authors:
Brian D. Connolly; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Bifocal Relay Mirror spacecraft attitude control simulator is under development in the Spacecraft Research and Design Center of the Naval Postgraduate School (NPS). The objective of this test bed is to provide on-the- ground simulation of the dynamics and control of spacecraft for high precision acquisition, tracking, and pointing applications associated with space-based laser relay. The required initial attitude determination accuracy for the Bifocal Relay Mirror test bed is ... |
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| Atmospheric Compensation Applications and Data |
07 APR 2004 |
14 pages |
| Authors:
James A. Gardner; A. L. Broadfoot; ARIZONA UNIV TUCSON LUNAR AND PLANETARY LAB
|
| Activity on this contract is divided between validation and verification testing of FLAASH and its radiative transport engine "MODTRAN", and data collection planning and analysis needed to calibrate and validate flight hyperspectral instruments. Major efforts included the atmospheric compensation code "Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes: (FLAASH), the MightySat 11.1 Hyperspectral Interferometer (referred to herein as MS 11.1), the Warfighter-1 Hyperspectral Imager (referred to herein as WF-1), the Noble ... |
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| How Compensation in Test and Evaluation Affects Aircraft Acquisition |
APR 2004 |
15 pages |
| Authors:
Lionel D. Alford; DEFENSE ACQUISITION UNIV ALUMNI ASSOCIATION ALEXANDRIA VA
|
| Systems developers and testers have assumed that human compensation is measurable, or at least that a cognizant and trained tester is able to identity and detect compensation. More than one study conducted at the Wright- Patterson LAMAPS facility indicates that this is not necessarily true. Test pilots were able to compensate sufficiently to fly and meet defined performance standards on intentionally crippled aircraft flight control designs. These flight control systems ... |
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| Neural Network Based Adaptive Control of Uncertain and Unknown Nonlinear Systems |
31 MAR 2004 |
18 pages |
| Authors:
Anthony J. Calise; GEORGIA INST OF TECH ATLANTA
|
| The objectives of this research effort were to exploit recent advances in neural network (NN) based adaptive control, with the goal of being able to treat a very general class of nonlinear system, for which the dynamics are not only uncertain, but may in fact be unknown except for minimal structural information, such as the relative degree of the regulated output variables. We were particularly interested in designing adaptive control ... |
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| Cooperative Control of Autonomous Flight Vehicles Formation |
29 MAR 2004 |
137 pages |
| Authors:
Mario Innocenti; PISA UNIV (ITALY) DEPT OF ELECTRICAL SYSTEMS AND AUTOMATION
|
| This report presents results from research dealing with the aspects of automated formation management and control necessary for the development of a dual controller capable of keeping a given formation structure and allowing the formation to follow specified paths. The report contains two parts. Part I describes the results obtained, and methodologies developed, for the dynamics and control of unmanned air vehicles flying in a formation. Part II describes a ... |
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| Study of Wireless Transmission Protocol Technology for Use in Flight Line Environment to Assist the Data Loading and Downloading on Aircraft |
MAR 2004 |
141 pages |
| Authors:
Ow K. Meng; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Presently, the required data file to be loaded onto the Radar Warning Receiver (RWR) onboard the F-16 aircraft is done manually by the aircraft technicians, two to three hours prior to the actual flight time, This process should be automated As such there is a need to look into the use of wireless tmnsmission technology to complement or replace the manual method of loading the critical data file from the ... |
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| An Investigation Relating Longitudinal Pilot-Induced Oscillation Tendency Rating to Describing Function Predictions for Rate-Limited Actuators |
MAR 2004 |
154 pages |
| Authors:
Joel B. Witte; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The purpose of this study was to investigate pilot-induced oscillations (PIO) and determine a method by which PIO tendency rating could be predicted. In particular, longitudinal PIO in the presence of rate-limited actuators were singled out for examination. Sinusoidal input/triangular output describing function techniques using Nichols charts were used. A new criterion dubbed Gap Criterion was calculated for PIO sensitivity. This criterion consists of the product of pilot gain necessary ... |
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| Multisensory Integration for Pilot Spatial orientation (MIPSO) |
MAR 2004 |
103 pages |
| Authors:
Ronald L. Small; Christopher D. Wickens; Alla M. Oster; John W. Keller; Jon W. French; MICRO ANALYSIS AND DESIGN BOULDER CO
|
| Spatial disorientation (SD) is a normal human response to accelerations in flight, and has existed since early flight. Its cost to the US military is over $300 million per year, with comparable costs to US civil aviation. Despite significantly increased research over the past decade, the rate of accidents caused by SD has not decreased. While the most recent research emphases have been on understanding the physiology of SD, the ... |
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| Small Polarimetric Adaptive Array for Airborne GPS Jammer Suppression |
MAR 2004 |
|
| Authors:
Dennis Blejer; Eugene C. Ngai; Tri T. Phuong; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| MIT Lincoln Laboratory has designed, built, tested, and analyzed a small polarimetric adaptive array for airborne GPS jammer suppression. The array has 7 channels and is configured as a square array. The array consists of a right-hand circularly polarized (RHCP) reference element and 3 dual-linearly polarized elements. The rationale for the design was to create a 7-channel array with 1 RHCP reference element that had acceptable levels of mutual coupling ... |
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| Exploring Automation Issues in Supervisory Control of Multiple UAVs |
MAR 2004 |
7 pages |
| Authors:
Heath A. Ruff; Gloria L. Calhoun; Mark H. Draper; John V. Fontejon; Brian J. Guilfoos; SYTRONICS INC DAYTON OH
|
| An evaluation was conducted on a generic UAV operator interface simulation testbed to explore the effects of levels-of-automation (LOAs) and automation reliability on the number of simulated UAVs that could be supervised by a single operator. LOAs included Management-by-Consent (operator consent required) and Management-by-Exception (action automatic unless operator declines). Results indicated that the tasks were manageable, but performance decreased with increased number of UAVs supervised and reduced automation reliability. Performance ... |
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| Loss of Pitch Control During Takeoff, Air Midwest Flight 5481, Raytheon (Beechcraft) 1900D, N233YV, Charlotte, North Carolina, January 8, 2003 |
26 FEB 2004 |
214 pages |
| Authors:
NATIONAL TRANSPORTATION SAFETY BOARD WASHINGTON DC
|
| On January 8, 2003, about 0847:28 EST, Air Midwest flight 5481, a Raytheon (Beechcraft) 1900D, N233YV, crashed shortly after takeoff from runway 18R at Charlotte-Douglas International Airport, Charlotte, North Carolina. The 2 flight crew members and 19 passengers aboard the airplane were killed, 1 person on the ground received minor injuries, and the airplane was destroyed by impact forces and a postcrash fire. Flight 5481 was a regularly scheduled passenger ... |
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| Nonlinear Identification and Adaptive Control |
23 FEB 2004 |
23 pages |
| Authors:
Dennis S. Bernstein; MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING
|
| To address Air Force applications, new methods are developed for system identification (ID) and adaptive control. For linear systems, ID algorithms are developed to obtain consistent parameter estimates, stable models, and optimal inputs. Nonlinear ID methods are developed for block- structured models with measured-input nonlinearities. Subspace ID methods are used to identify linear model components, while optimization methods are used to construct efficient basis functions. Specialized methods are developed to ... |
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| Reconfigurable Control Design for the X-40A With In-Flight Simulation Results |
FEB 2004 |
12 pages |
| Authors:
Michael W. Oppenheimer; David B. Doman; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| In order to increase survivability and maximize performance, autonomous vehicles require the development of algorithms that fulfill the role of an adaptive human pilot in response to failures, damage, or uncertain vehicle dynamics. Hence, the guidance and control algorithms implemented on autonomous vehicles must be able to react and compensate, whenever possible, for failures so that their impact can be minimized. In this work, an adaptive reconfigurable inner-loop controller is ... |
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| Flight Test Results of an Adaptive Guidance System for Reusable Launch Vehicles |
FEB 2004 |
18 pages |
| Authors:
John D. Schierman; Neha Gandhi; Jason R. Hull; David G. Ward; BARRON ASSOCIATES INC CHARLOTTESVILLE VA
|
| To enable autonomous operations in future Reusable Launch Vehicles (RLVs), reconfigurable control and adaptive guidance will often be required to facilitate recovery of the mission following a major anomalous event such as an effector failure. An adaptive guidance system that works in conjunction with a reconfigurable controller and an autonomous trajectory command reshaping algorithm is presented. The guidance law utilizes a backstepping architecture to generate pitch rate commands that drive ... |
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| A New Control Allocation Method That Accounts for Effector Dynamics |
FEB 2004 |
8 pages |
| Authors:
Ram Venkataraman; Michael Oppenheimer; DAvid Doman; AIR FORCE RESEARCH LAB (AFRL/VACA) WRIGHT-PATTERSON AFB OH CONTROL THEORY OPTIMIZATION BRANCH
|
| Given a time history of desired moments, the confrol allocation problem is to solve for the effector inputs so that some norm of the error between the achieved and desired moments is minimized. Existing methods solve for the actuator deflections, while accounting for Magnitude and rate limitations of the effectors. In this paper, we propose the Dynamic Control Allocation (DCA) Method, that also accounts for effector dynamics, in addition to ... |
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| Outside Loop Control in Asymmetrical Trimmed Flight Conditions |
FEB 2004 |
145 pages |
| Authors:
Gary D. Miller; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH DEPT OF AERONAUTICS AND ASTRONAUTICS
|
| Traditionally flight control systems have used linearized equations of motion solved around a single trim point. This thesis proposes a nested-loop controller directly solved from the equations of motion. The control equations were developed as a solution to asymmetrically trimmed flight conditions. A two- loop design was proposed for the controller. The outer loop modeled the aircraft as a point mass and all forces were balanced to find the aircraft ... |
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| Computer-Aided Synthesis of Nonlinear Autopilots for Missiles |
2004 |
27 pages |
| Authors:
P. K. Menon; E. J. Ohlmeyer; OPTIMAL SYNTHESIS PALO ALTO CA
|
| Powerful nonlinear approaches for missile autopilot design have recently emerged in the literature, which have the potential to deliver improved missile performance. However, the lack of computational methods has made it difficult for the practicing engineers to exploit these techniques in routine applications. Another factor that has slowed their application is that the missile models are generally available in the form of simulations, rather than as compact set of differential-algebraic ... |
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| Robust and Optimal Control of Spatially Interconnected Systems, With Application to Coordinated Vehicle Control |
14 DEC 2003 |
9 pages |
| Authors:
Raffaello D'Andrea; CORNELL UNIV ITHACA NY DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| The research supported by this grant consisted of developing improved algorithms and theory for designing and analyzing robust control systems for spatially interconnected systems. There are many examples of such systems, including automated highway systems, airplane formation flight, satellite constellations, cross-directional control in paper processing applications, and micro-cantilever array control for massively parallel data storage. One can also consider lumped approximations of partial differential equations - examples include the deflection ... |
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| Flow Control Over Swept, Sharp-Edged Wings at Low and Moderate Angles of Attack |
10 DEC 2003 |
28 pages |
| Authors:
Demetri P. Telionis; Pavlos P. Vlachos; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIENCE AND MECHANICS
|
| Active control of fully-separated flow over symmetric sharp-edged wings at high angles of attack is investigated. Experiments were carried out in a low-speed, open circuit wind tunnel, as well as a Mach 0.2, 6'x6' wind tunnel. Angles of attack from 30 to 210 were tested. Low-power input, unsteady excitation was applied to the leading edge of the wings. The actuation was introduced by the periodic oscillation of a 4-percent-chord flap ... |
|
| An Investigation of Open Loop Flight Control Equations of Motion Used to Predict Flight Control Surface Deflections at Non-Steady State Trim Conditions (Project HAVE TRIM) |
DEC 2003 |
184 pages |
| Authors:
Gary D. Miller; Fabrizio Beccarisi; E. J. Teichert; Matthew W. Higer; Peter A. Wenell; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
|
| This report presents the results of Project HAVE TRIM, An Investigation of Open Loop Flight Control Equations of Motion Used To Predict Flight Control Surface Deflections at Non-Steady State Trim Conditions. The overall test objective was to validate the HAVE TRIM model through comparison of predicted control surface deflections with flight test measured control surface deflections at specified trimmed conditions. The USAF Test Pilot School, Class 03A, conducted 10 flights ... |
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| Validation & Verification of Intelligent and Adaptive Control Systems |
OCT 2003 |
12 pages |
| Authors:
James M. Buffington; Vince Crum; Bruce Krogh; Clinton Plaisted; Ravi Prasanth; LOCKHEED MARTIN AERONAUTICS CO FORT WORTH TX
|
| Emerging military aerospace system operational goals, such as autonomy, will require advanced safety-critical control systems consisting of unconventional requirements, system architectures, software algorithms, and hardware implementations. These emerging control systems will significantly challenge current verification and validation (V&V) processes, tools, and methods for flight certification. Ultimately, transition of advanced control systems that enable transformational military operations will be decided by affordable V&V strategies that reduce costs and compress schedules for ... |
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| Model Predictive Dynamic Control Allocation with Actuator Dynamics |
OCT 2003 |
16 pages |
| Authors:
Yu Luo; Andrea Serrani; Stephen Yurkovich; David B. Doman; Michael W. Oppenheimer; AIR FORCE RESEARCH LAB (AFRL/VACA) WRIGHT-PATTERSON AFB OH CONTROL THEORY OPTIMIZATION BRANCH
|
| A model predictive, dynamic control allocation algorithm is developed in this paper for the inner loop of re-entry vehicle guidance and control system. The purpose of the control allocation portion of the guidance and control architecture is to distribute control power among redundant control effectors to meet the desired control objectives under a set of constraints. Most existing algorithms neglect the actuator dynamics or deal with the actuator dynamics separately, ... |
|
| Differences in Pilot Automation Philosophies in the US and Russian Air Forces Ground Collision Avoidance Systems |
OCT 2003 |
9 pages |
| Authors:
William B. Albery; Mikhail N. Khomenko; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
|
| G-induced loss of consciousness (G-LOC) is a pilot human factors (HF) problem that plagues all air forces that fly high performance fighter aircraft. Spatial disorientation (SD) is an even more serious HF problem that affects not only the military but also commercial aviation. By some estimates, one out of every four aircraft mishaps is due to a HF problem, and the pilot flies a perfectly operating aircraft into the terrain. ... |
|
| Cockpit Automation Philosophy |
OCT 2003 |
|
| Authors:
Etienne Tarnowski; AIRBUS INDUSTRIE BLAGNAC (FRANCE)
|
| The civil aviation environment has rapidly evolved in the past decades. In the 70s, 500 billion passengers per kilometer were transported; in the 80s, that figure doubled, and in the 90s it doubled again reaching 2000 billion passengers per kilometer. The cargo demand, in parallel, increased at an average rate of 10% per year. This has enlarged the air traffic rate and created severely congested skies. At the same time, ... |
|
| Technical Evaluation Report |
OCT 2003 |
13 pages |
| Authors:
Jeffrey I. Sands; MITRE CORP MCLEAN VA
|
| On 7-9 October 2002, more than 100 NATO, Partnership for Peace, and Non-NATO nationals from 22 countries met in Warsaw, Poland, to discuss the role of humans in intelligent and automated systems. Sponsored by the Human Factors and Medicine Panel of the North Atlantic Treaty Organization's Research and Technology Organization, the symposium participants discussed how automation technology can take advantage of human strengths and compensate for human weaknesses and vice ... |
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| Simulator Technology in Optimising the Human-Automated System Interface |
OCT 2003 |
11 pages |
| Authors:
Cezary Szczepanski; WARSAW UNIV OF TECHNOLOGY POLAND INST OF AERONAUTICS AND APPLIED MECHANICS
|
| Over time, the increasing complexity of the human-machine environment has required greater and greater abilities in input data analysis, decision making, and system control on the part of the human operator. Time deficits combined with the above requirements gradually brought about the introduction of automated systems to support the human operator in his/her task performance. Complex, hierarchical control systems began to overtake a part of the work typically done by ... |
|
| A Concept of Flight Execution Monitor (FEM) for Helicopter Pilot Assistance |
OCT 2003 |
11 pages |
| Authors:
Patrick Le Blaye; OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AERONOSPATIALES CEDEX FRANCE SYSTEMS CONTROL/FLIGHT DYNAMICS
|
| PAVE (Pilot Assistant in the Vicinity of hElipads) is a global research project conducted under the ONERA-DLR common research programme. Several new technologies are now available for helicopter onboard applications that have potentialities to support the pilot's perception and decision making. The technologies addressed in the frame of this project include an advanced flight control system, calculation of flight envelope limitations, enhanced and synthetic vision, and mission inflight planning and ... |
|
| Automatic Dependent Surveillance - Broadcast/Cockpit Display of Traffic Information: Pilot Use of the Approach Spacing Application |
OCT 2003 |
20 pages |
| Authors:
O. V. Prinzo; Alfred M. Hendrix; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| Pilots may benefit from surveillance technology that enhances their ability to maintain pre-determined distances from other aircraft during initial and final approach. Avionics that provide a cockpit display of traffic information (CDTI) enable pilots to acquire, verify, establish, and maintain pre-defined spacing intervals from other aircraft. It is of interest to the Federal Aviation Administration to determine how the use of these displays influences safety, capacity, and efficiency. The second ... |
|
| Constructive Nonlinear Control |
30 SEP 2003 |
9 pages |
| Authors:
Petar V. Kokotovic; CALIFORNIA UNIV SANTA BARBARA CENTER FOR CONTROL ENGINEERING AND COMPUTATION
|
| During this grant period, we have enhanced robustness of our designs and thus increased their ability to accommodate disturbances and unmodeled dynamics. We have also broadened the class of systems to which these methods are applicable. In a different direction, we have developed structure specific methods to analyze boundedness properties of systems with "stiffening" nonlinearities, as in micro-electromechanical probes. A major advance has been made on difficult output feedback problem ... |
|
| The RMAX Helicopter UAV |
02 SEP 2003 |
|
| Authors:
Akira Sato; YAMAHA MOTOR CO LTD IWATA (JAPAN) FUNDAMENTAL RESEARCH DIV
|
| In Japan, chemical spraying by manned helicopter was started in 1958, nowadays it has spread throughout Japan. But residents who live near paddy rice field have began to complain of using 'manned helicopter', because the agricultural chemical drifts to their houses. Looking at the Japanese farming industry, because of the aging of the work force and lack of a younger generation of successors, it has been more and more difficult ... |
|
| Automatic Air Collision Avoidance System (Auto-ACAS) |
02 SEP 2003 |
11 pages |
| Authors:
Mark A. Skoog; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION EDWARDS AFB CA DRYDEN FLIGHT RESEARCH CENTER
|
| Briefing charts from presentation on the Automatic Air Collision Avoidance System(Auto-ACAS). |
|
| Autonomous Navigation & Collision Avoidance System For The Nearchos UAV |
02 SEP 2003 |
33 pages |
| Authors:
Kimon Valavanis; STN ATLAS ELEKTRONIK GMBH BREMEN (GERMANY)
|
| Briefing charts from presentation on the autonomous navigation and collision avoidance system for the NEARCHOS UAV. |
|
| Dragon Drone UAV System |
02 SEP 2003 |
8 pages |
| Authors:
BAI AEROSYSTEMS INC EASTON MD
|
| Technical publication containing information on the development and application of the Dragon Drone UAV system. |
|
| Current Flying and Handling Qualities Simulations in AFRL/VA |
SEP 2003 |
13 pages |
| Authors:
Curtis S. Clark; Jeff Slutz; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
|
| There has been renewed interest in recent years by the Air Force and collaborative partners in industry, academia, and other government agencies in conducting real-time, pilot-in-the-loop, motion-based simulations exploring Flying and Handling Qualities (FHQ) of future aircraft concepts. This field of study, prematurely declared by a few as a "sunset science", has returned to relevance and importance as modern methods of control law design are used to maximize performance of ... |
|
| Secure Ground-Based Remote Recording and Archiving of Aircraft "Black Box" Data |
SEP 2003 |
194 pages |
| Authors:
Paul R. Schoberg; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Aircraft accident investigation centers upon the analysis at all available information about the accident flight in the period leading up to the final catastrophe. Key among the sources at information is date captured and recorded in the flight data recorder and cockpit voice recorder, which are often referred to as the aircraft black boxes". Par some accidents, this flight data may he lest entirely or partially damaged and largely unusable. ... |
|
| Validation and Verification of Intelligent and Adaptive Control Systems (VVIACS) |
SEP 2003 |
|
| Authors:
James Buffington; LOCKHEED MARTIN AERONAUTICS CO FORT WORTH TX
|
|
| Optimal Fixed-Interval Integrated Guidance-Control Laws for Hit-to-Kill Missiles |
AUG 2003 |
10 pages |
| Authors:
P. K. Menon; G. D. Sweriduk; E. J. Ohlmeyer; OPTIMAL SYNTHESIS PALO ALTO CA
|
| Due to their potential for reducing the weapon size and efficiency, design methods for realizing hit-to- kill capabilities in missile systems are of significant research interest in the missile flight control community. As defined in this paper, hit-to-kill capability requires the missile to consistently achieve point-mass miss distances less than half the minimum dimension of the target. It has been noted in the literature that the chief contributors to the ... |
|
| Passive Altimeter Study Using GPS Flight Data (Preprint) |
AUG 2003 |
10 pages |
| Authors:
L. L. Liou; J. B. Tsui; D. M. Lin; J. Schamus; F. van Graas; Y. T. Morton; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIRECTORATE
|
| Software GPS receiver results are presented for an over-land, passive altimeter application utilizing GPS signals. The flight data were collected using a DC-3 aircraft operated by Ohio University. The flight took place over southeast Ohio, where the terrain is hilly and forested. The GPS receiver on board the aircraft contains two channels. One channel has a right-hand-circular-polarized antenna facing upward, and the second has a left-hand-circular-polarized antenna facing downward. The ... |
|
| An Adaptive Approach to Vision-Based Formation Control |
Aug-2003 |
14 pages |
| Authors:
Anthony J Calise; Ramachandra Sattigeri; Johnny H Evers; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
|
| In considering the problem of formation control in the deployment of intelligent munitions, it would be highly desirable, both from a mission and a cost perspective, to limit the information that is transmitted between vehicles in formation. However, the lack of information regarding the state of motion of neighboring vehicles can lead to degraded performance and even instability. This paper presents an adaptive output feedback approach for addressing this problem. ... |
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| Occupational Survey Report, AFSC 2A3X1, A-10/F-15/U-2 Avonics Systems |
10 JUL 2003 |
41 pages |
| Authors:
Burke Burright; AIR EDUCATION AND TRAINING COMMAND RANDOLPH AFB TX
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| Presentation of findings from Occupational Survey Report for AFSC 2A3X1, A-10, F-15 and U-2 avionics systems. |
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| Hardware-In-The-Loop Simulation Using Open Control Platform |
JUL 2003 |
13 pages |
| Authors:
Stanley H. Pruett; Gary J. Slutz; James L. Paunicka; Eric Portilla; AIR FORCE RESEARCH LAB WRIGHT-PATTERSONAFB OH CONTROL SIMULATION AND ASSESSMENT BR
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| Air Force Research Laboratory (AFRL) researchers at the Aerospace Vehicle Technology Assessment and Simulation (AVTAS) Laboratory are currently conducting the Open Control Platform (OCP) Hardware-In-The-Loop (HITL) project sponsored by the DARPA Software Enabled Control (SEC) Program. The purpose of this project is to develop the capability to be an OCP test-bed and to evaluate the OCP controls and simulation environment for a specific test case. The OCP provides an open, ... |
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| Low Airspeed Measuring Devices for Helicopter Usage Monitoring |
MAY 2003 |
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| Authors:
C. G. Knight; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) PLATFORM SCIENCES LAB
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| Low airspeed measurement is problematic on helicopters due to adverse flow fields from the rotors impinging on the standard pitot static system. A variety of alternative methods exist to measure airspeed. This note presents a brief review of some of the low airspeed measuring devices available for aircraft and, more particularly, helicopters. This note also introduces a novel technique that was studied within Air Vehicles Division as a concept demonstrator. ... |
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| Data-Driven Robust Control Design: Unfalsified Control |
MAY 2003 |
18 pages |
| Authors:
Michael G. Safonov; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
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| Feedback control systems for aerospace applications must maintain precise control despite uncertain operating conditions and unanticipated circumstances such as battle damage. These systems must be designed to perform robustly, despite uncertain design models and difficult to analyze nonlinear effects. They must also be capable of learning and adapting when accumulating data indicates that previous models must be abandoned and that existing control strategies must be changed. We present recent developments ... |
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| Using Interference Models to Predict Performance in a Multiple-Task UAV Environment - 2 UAVs |
Apr-2003 |
65 pages |
| Authors:
Stephen Dixon; Christopher D Wickens; Dervon Chang; ILLINOIS UNIV AT URBANA-CHAMPAIGN SAVOY AVIATION HUMAN FACTORS DIVISION
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| Twenty four pilots flew simulated missions in an unmanned air vehicle UAV simulator under both single and dual UAV control, and in three conditions: a baseline condition, a condition in which certain information was displayed auditorally, to offload the heavy visual demands of the mission, and a condition in which flight path tracking was automated. Three tasks were performed within each UAV workstation: 1 Meeting the mission goals, by flying ... |
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| A Comparison of Nonlinear Algorithms to Prevent Pilot-Induced Oscillations Caused by Actuator Rate Limiting |
MAR 2003 |
107 pages |
| Authors:
James G. Henley; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| The objective of this study was to compare the ability of the Feedback-with-Bypass (FWB) and the Derivative-Switching (DS) flight control system filters to prevent PIO during actuator rate limiting, and the filters' effects on aircraft handling qualities. This comparison was conducted in three steps: computer simulation, ground simulation in the Large Amplitude Multimode Aerospace Research Simulator (LAMARS), and flight tests conducted in the Variable Stability In-flight Simulator Test Aircraft (VISTA). ... |
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| Transonic Pressure, Force, and Flow-Visualization Measurements on a Pitching Straked Delta Wing at High Alpha |
MAR 2003 |
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| Authors:
Atlee M. Cunningham Jr.; Evert G. Geurts; NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
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| A force and pressure test was conducted in May 1992 (at the National Aerospace Laboratory NLR, The Netherlands) on a simple straked wing with the objective to extend the understanding of flow fields at low speed and high incidence obtained in earlier tests, up to transonic speeds also at high incidences. A flow visualization test was then conducted with the same simple straked wing modes in August 1996 for the ... |
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| Study on Unsteady Vortex Behaviour of a Rolling Sixty Five Degree (65) Delta Wing at M=0.8 Using Pressure Sensitive Paint (PSP) |
MAR 2003 |
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| Authors:
Rolf H. Engler; Christian Klein; Sergey Fonov; Karl-Aloys Butefisch; Kari-Wilhelm Bock; NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
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| Since the need for improvements in high angle-of-attack maneuverability of aircraft's in transonic flight was of concern, a model was rotated around its longitudinal body axis with a dimensionless rolling rate of pi = 0.0762 (10 Hz), resulting in flow conditions with extensive vortical behavior and strongly non-linear, wing/vortex interference effects. This paper deals with validation experiments performed at the DLR Goettingen. The objective of this activity was to provide ... |
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| Hierarchical Robust and Adaptive Nonlinear Control Design |
20 FEB 2003 |
50 pages |
| Authors:
Wassim M. Haddad; GEORGIA INST OF TECH ATLANTA SCHOOL OFAEROSPACE ENGINEERING
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| The authors proposed the development of a general multiechelon hierarchical nonlinear switching control design framework that minimizes control law complexity subject to the achievement of control law robustness. In particular, a unified dynamical systems framework for a general class of systems possessing left-continuous flows was developed. This report also discusses hybrid control, impulsive dynamical systems, nonnegative dynamical systems, compartmental systems, nonlinear switching control, and adaptive control. Areas of application for ... |
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| Combining State Dependent Riccati Equation Approach With Dynamic Inversion: Application to Control of Flight Vehicles |
FEB 2003 |
18 pages |
| Authors:
Rama K. Yedavalli; Praveen Shankar; David B. Doman; OHIO STATE UNIV COLUMBUS
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| State Dependent Algebraic Riccati Equation (SDRE) techniques are rapidly emerging as a design method, which provides a systematic and effective means of designing nonlinear controllers, observers, and filters. This paper describes a new method of integrating the SDRE technique with the Dynamic Inversion control law that is frequently used in the design of aircraft control systems. This paper also provides an example by applying this control design technique to a ... |
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| Automatic Legibility Control (ALC) of Electronic Displays |
FEB 2003 |
427 pages |
| Authors:
Keith T. Burnette; BURNETTE ENGINEERING FAIRBORN OH
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| Pilot legibility requirements are investigated to establish a basis for implementing automatic control over electronic and conventional displays, in day through night aircraft cockpit viewing environments. Applicable legibility test results, published by different experimenters over much of the past century, are examined and analyzed, and comparisons are used to assess their validity as display control criteria. The mathematical model of the human visual system developed provides a basis for the ... |
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| A Comparison of Nonlinear Algorithms in the Prevention of Pilot-Induced Oscillations Caused by Actuator Rate Limiting (Project HAVE PREVENT) |
DEC 2002 |
58 pages |
| Authors:
James Hanley; Stefan Ritter; John Gloystein; George Griffiths Jr.; JOel Luker; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
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| This report presents the results of Project HAVE PREVENT, a comparison of nonlinear algorithms in the prevention of pilot-induced oscillations (PlO) caused by actuator rate limiting. The overall test objective was to compare the ability of two flight control system filters in the prevention of PlO during actuator rate limiting. The Air Force Institute of Technology, Engineering Department (AFIT/ENY) requested this testing. The USAF Test Pilot School (TPS), Class O2A, ... |
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| Development and Control of Robotic Arms for the Naval Postgraduate School Planar Autonomous Docking Simulator (NPADS) |
DEC 2002 |
110 pages |
| Authors:
Gary L. Cave; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This thesis encompasses the development of two robotic arms for integration onto the Naval Postgraduate School (NPS) Planar Autonomous Docking Simulator (NPADS) servicing vehicle, This research effort involved support structure design, fabrication, and construction, off-the-shelf motion control hardware integration, and control algorithm development and testing. The NPADS system is being built as a test platform for spacecraft docking and capture mechanisms designed for autonomous rendezvous and servicing missions. As with ... |
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| A Study of Dynamic Stall Vortex Development Using Two-Dimensional Data from the AFDD Oscillating Wing Experiment |
DEC 2002 |
98 pages |
| Authors:
Myung J. Rhee; ARMY AVIATION RESEARCH AND TECHNOLOGY ACTIVITY MOFFETT FIELD CA AEROFLIGHTDYNAMICS DIRECTORATE
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| The purpose of this study is to examine the previously unpublished instantaneous pressure data of the Aeroflightdynamics Directorate Two- Dimensional (2D) and Three-Dimensional (3D) Oscillating Wing Experiment to better understand the process of dynamic stall vortex development on the NACA 0015 airfoil. This report presents representative 2D instantaneous pressure data for the upper and lower surfaces of the airfoil at various chordwise locations obtained at specific angles of attack during ... |
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| Flight Demonstration of Stealthy Closed-Loop Attitude Control |
12 OCT 2002 |
80 pages |
| Authors:
A. B. Cain; T. T. Ng; E. J. Kerschen; H. F. Fasel; E. D. Fasse; INNOVATIVE TECHNOLOGY APPLICATIONS CHESTERFIELD MO
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| Flight demonstration of modern stealthy aircraft with an active flow control system is an important, complex, and challenging problem. The probability of success in the current program was maximized by a progressive plan in which complexity was introduced gradually. Active flow control systems for stealthy maneuvering were advanced on several fronts in this Phase I STTR program. A simple closed-loop control system that integrates active flow control (suction) actuators and ... |
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| Wide-Area Ice Detection Using Time Domain Reflectometry |
OCT 2002 |
37 pages |
| Authors:
Norbert E. Yankielun; Charles C. Ryerson; Sarah L. Jones; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
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| Ice accretion on the wings of fixed-wing aircraft and on the rotors of rotor-wing aircraft can have disastrous results. The ice that forms on a wing structure especially along the leading edge modifies the wing aerodynamics resulting in decreased lift. In the extreme this can lead to stall and loss of control of the aircraft and potentially a crash. Ice building up elsewhere on the wing rotor or airframe can ... |
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| General Aviation Pilot Performance Following Unannounced In-Flight Loss of Vacuum System and Associated Instruments in Simulated Instrument Meteorological Conditions |
OCT 2002 |
13 pages |
| Authors:
Kathleen M. Roy; Dennis B. Beringer; AIRCRAFT OWNERS AND PILOTS ASSOCIATION FREDERICK MD
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| Forty-one instrument-rated pilots were exposed to an unannounced failure of attitude and heading instrumentation during flight in single-engine general aviation aircraft: 25 in a Piper Archer PA-28 and 16 in a Beechcraft Bonanza A36. The PA-28 flights consisted of three groups: (1) Group A - a failure of the attitude indicator (Al) and directional gyro (DG), (2) Group B - same as Group A but received 30 minutes of partial-panel ... |
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| Assessment of Human Interaction with Virtual Environment Training Technology |
OCT 2002 |
46 pages |
| Authors:
Celestine A. Ntuen; S. Yoon; NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO
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| This research investigated the evidence of performance improvement of piloting skills while using an immersive virtual environment (IVE) versus a nonimmersive virtual environment (NIVE) to train instrument pilot skills. The general hypothesis tested was whether there is equal improvement for people trained under IVE and NIVE. Subjects were tested in IVE and NIVE flight scenarios using three flying tasks normal crosswind approach and landing (NCAL), go-around (GA), and constant speed ... |
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| Robustness Study of the Dynamic Inversion Based Indirect Adaptive Control of Flight Vehicles with Uncertain Model Data |
OCT 2002 |
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| Authors:
Rama K. Yedavalli; Praveen Shankar; David B. Doman; OHIO STATE UNIV COLUMBUS
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| The objective of this paper is to analyze the stability robustness of dynamic inversion based control laws being used for flight control with uncertainties in model data such as the aerodynamic stability and control derivatives. In particular, the proposed method is aimed at determining the robustness of an indirect adaptive control system developed by the researchers at the AFRL, which is built around a baseline dynamic inversion inner loop. MATLAB/SIMULINK ... |
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| Development and Control of the Naval Postgraduate School Planar Autonomous Docking Simulator (NPADS) |
SEP 2002 |
101 pages |
| Authors:
Robert D. Porter; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The objective of this thesis was to design, construct and develop the initial autonomous control algorithm for the NPS Planar Autonomous Docking Simulator (NPADS) The effort included hardware design, fabrication, installation and integration; mass property determination; and the development and testing of control laws utilizing MATLAB and Simulink for modeling and LabView for NPADS control, The NPADS vehicle uses air pads and a granite table to simulate a 2-D, drag-free, ... |
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| Workload Demands of Remotely Piloted Vehicle Supervision and Control: (1) Single Vehicle Performance |
Sep-2002 |
40 pages |
| Authors:
Stephen Dixon; Christopher D Wickens; ILLINOIS UNIV AT URBANA-CHAMPAIGN SAVOY AVIATION HUMAN FACTORS DIVISION
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| Eighteen licensed pilots flew a remotely piloted vehicle RPV simulation on three 10-leg missions. The simulation required navigating to an enemy target, monitoring for unexpected targets in a 3D image display, and monitoring on-board systems. Both of the first two tasks required zooming in to inspect 3D images of the targets. Displays to support these activities were presented on a 19 inch Screen. Each pilot flew in a baseline condition, ... |
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| SA-CIRCA: Self-Adaptive Control for Mission-Critical Systems |
AUG 2002 |
48 pages |
| Authors:
David J. Musliner; Robert P. Goldman; Michael J. Pelican; Kurt D. Krebsbach; Edmund H. Dunfee; HONEYWELL TECHNOLOGY CENTER MINNEAPOLISMN
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| The goal of this effort was to begin extending the Cooperative Intelligent Real-Time Control Architecture (CIRCA) with abilities to automatically monitor its own performance and adapt in real-time, forming Self- Adaptive CIRCA (SA-CIRCA). CIRCA is a coarse-grain architecture designed to control autonomous systems which require both intelligence, deliberative planning activity and highly reliable, hard-real-time reactions to safety threats. CIRCA allows systems to provide performance guarantees that ensure they will remain ... |
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| Mathematical Models for a Missile Autopilot Design |
AUG 2002 |
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| Authors:
Farhan A. Faruqi; Thanh L. Vu; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION CANBERRA (AUSTRALIA)
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| This report considers the derivation of the mathematical model for a missile autopilot in state space form. The basic equations defining the airframe dynamics are non-linear, however, since the non-linearities are "structured" (in the sense that the states are of quadratic form) a novel approach of expressing this non-linear dynamics in state space form is given. This should provide a useful way to implement the equations in a computer simulation ... |
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| Separation Control for Rotorcraft |
AUG 2002 |
73 pages |
| Authors:
Peter F. Lorber; Duane C. McCormick; Brian E. Wake; Razvan Florea; UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT
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| Active flow control can play a significant role in improving rotorcraft performance by delaying flow separation. Retreating blade stall (RBS) limits rotor capability to generate lift and transmits large pitching moments to the flight control system. This project developed compact, high-power flow control actuators for RBS and evaluated them using a combination of computation and a wind tunnel test on a full scale helicopter blade section. A set of electromechanical ... |
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| Nonlinear Control and Identification |
31 JUL 2002 |
8 pages |
| Authors:
Munther A. Dahleh; John N. Tsitsiklis; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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| This research is motivated by the problem of motion planning of autonomous vehicles in an uncertain environment. A possible approach to reduce the computational complexity of the motion planning problem for a nonlinear, high dimensional system, is based on a quantization of the system dynamics, in the sense that we restrict the feasible nominal system trajectories to the family of time-parametrized curves that can be obtained by the Inter-connection of ... |
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| Application of Sliding Mode Methods to the Design of Reconfigurable Flight Control Systems |
JUN 2002 |
320 pages |
| Authors:
Scott R. Wells; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH
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| Observer-based sliding mode control is investigated for application to aircraft reconfigurable flight control. An overview of reconfigurable flight control is given, including a review of the current state-of-the-art within the subdisciplines of fault detection parameter identification, adaptive control schemes, and dynamic control allocation. Of the adaptive control methods reviewed, sliding mode control (SMC) appears promising due its property of invariance to matched uncertainty. An overview of SMC is given and ... |
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| Air Traffic Conflict Resolution and Recovery |
MAY 2002 |
24 pages |
| Authors:
Alfons Geser; Cesar Munoz; Gilles Dowek; Florent Kirchner; INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA
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| An essential element in the Free Flight concept is the detection and avoidance of air traffic conflicts. A conflict occurs when the required separation between two aircraft, namely the ownership and the intruder, is lost. Conflict detection and resolution systems predict loss of separation and output conflict avoidance maneuvers that divert the ownership from its original trajectory. In this paper, we address the problem of redirecting the ownership to its ... |
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| Applying Performance-Controlled Systems, Fuzzy Logic, and Fly-by-Wire Controls to General Aviation |
MAY 2002 |
12 pages |
| Authors:
Dennis B. Beringer; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
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| A fuzzy-logic 'performance control' system, providing envelope protection and direct command of airspeed, vertical velocity, and turn rate, was evaluated in a reconfigurable general aviation simulator (configured as a Piper Malibu) at the FAA Civil Aerospace Medical Institute. Performance of 24 individuals (6 each of high-time pilots, low-time pilots, student pilots, and non-pilots) was assessed during a flight task requiring participants to track a 3-D course, from take-off to landing, ... |
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| Fear No Evil: Unmanned Combat Air Vehicles For Suppression of Enemy Air Defenses |
01 APR 2002 |
81 pages |
| Authors:
Robert E. Suminsby; AIR UNIV MAXWELL AFB AL AEROSPACE STUDIES INST
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| American strategies for the employment of airpower are increasingly based on the presumption of rapidly attaining air superiority with minimal losses. Such strategies presume an ability to locate and destroy enemy air defenses, exploiting US advantages in intelligence collection, stealth, and precision strike. While stealth technology has given US forces a huge advantage over most adversaries, and enables unprecedented freedom of action, this "technology gap" is not an advantage that ... |
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| Control Science Center of Excellence (CoE) |
APR 2002 |
4 pages |
| Authors:
David Leggett; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
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| The Air Vehicles Directorate formed the Control Science Center of Excellence (CoE) in 1998. The mission of the Control Science CoE is to plan and conduct basic research and exploratory development in advanced control technology to support the Air Force in the 21st century. The CoE develops and transitions air and space vehicle control technology in the areas of flight dynamics, multi variable control theory, adaptive control theory, robust control, ... |
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| Application of Multivariable Control to Air Vehicle |
APR 2002 |
8 pages |
| Authors:
Silva S. Banda; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
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| Modem military aircraft make use of fly-by-wire flight control systems to enhance the pilot's ability to control the vehicle. Fly-by-wire systems were first developed in the 1960s and were used to alleviate the pilot's workload. Today, virtually all modern military aircraft use feedback control systems to modify the vehicle dynamics and to provide some level of autonomy. |
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| Human/System Interface (HSI) Issues from a USAF Pilot/Combat Unmanned Air Vehicle (UAV) Test Operator Perspective |
APR 2002 |
7 pages |
| Authors:
Mark E. Garner; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH AIR VEHICLES DIRECTORATE
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| The complexity issues in dealing with the Human/System Interface (HSI) for an Unmanned Combat Air Vehicle (UCAV) system are numerous, varied, and difficult to overcome. I have been a part of the design and flight test team for one such system since early in the program. From this experience, I have come to conclusions that should help to reduce time and money spent on producing a useable, safe and robust ... |
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| A Six-Degree-of-Freedom Shaker Table, Active Isolator, and Gimbaled Stage for Research in Precision Motion Control and Target Tracking |
31 MAR 2002 |
14 pages |
| Authors:
Dennis S. Bernstein; MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING
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| We have acquired a unique facility that will allow us to conduct experimental research relating to precision motion control and target tracking in a high disturbance environment. The principal components include a six- degree-of-freedom (6-DOF) shaker table, active isolation stage, gimbal mount, and camera sensor. Individually, these components are valuable for research in guidance, tracking, control and related technologies. As an integrated system, this equipment provides a unique facility for ... |
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| Suppression of Pilot-Induced Oscillation (PIO) |
MAR 2002 |
203 pages |
| Authors:
Donald A. Johnson; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| Closed loop instability caused by excess phase lag induced by actuator rate limiting has been suspected in many pilot-induced oscillations (PIOs) and oscillatory departures from controlled flight. As part of the joint AFIT/TPS program, a longitudinal pilot command notch filter activated by a real- time oscillation verifier (ROVER) algorithm was developed to eliminate the PIO source for any developing, severe PIO. Closed loop computer simulations were conducted to prepare for ... |
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| YF22 Model With On-Board On-Line Learning Microprocessors-Based Neural Algorithms for Autopilot and Fault-Tolerant Flight Control Systems |
MAR 2002 |
233 pages |
| Authors:
Marcello R. Napolitano; WEST VIRGINIA UNIV RESEARCH CORP MORGANTOWN*
|
| This project focused on investigating the potential of on-line learning 'hardware-based' neural approximators and controllers to provide fault tolerance capabilities following sensor and actuator failures. Following a phase of simulation studies a set of selected architectures for neural estimators and neural controllers were flown on a semi-scale YF-22 aircraft model. The YF-22 model was designed, built, and flown at research facilities at West Virginia University. Additionally, a customized electronic payload ... |
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| Flight Control Failure Detection and Control Redistribution Using Multiple Model Adaptive Estimation with Filter Spawning |
MAR 2002 |
259 pages |
| Authors:
Michael L. Torres Jr; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| In the current research, the MMAE with Filter Spawning and Control Redistribution (MMAE/FS/CR) are used together to identify failures and apply appropriate corrections. This effort explores the performance of the MMAE/FS/CR in different regions of the flight envelope using model and gain scheduling. The MMAE/FS/CR is able to detect complete and partial actuator/surface failures, as well as complete sensor failures. Once the actuator/surface failure is identified and the effectiveness is ... |
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| Analysis of a Semi-Tailless Aircraft Design |
MAR 2002 |
108 pages |
| Authors:
Kurt W. Muller; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Many unique aircraft configurations cane out of Germany in World War II, one of these was the Blohm and Voss BV P 208. By using longitudinal and directional control surfaces located outboard of the wing tips they are removed from the downwash of the main wing. Additionally, the result is fewer component surfaces with less total surface area, thereby reducing both friction and interference drag and manufacturing cost. The configuration ... |
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| Design and Rapid Prototyping of Flight Control and Navigation System for an Unmanned Aerial Vehicle |
MAR 2002 |
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| Authors:
Bock Aeng Lim; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The work in this thesis is in support of a larger research effort to implement a cluster of autonomous airborne vehicles with the capability to conduct coordinated flight maneuver planning and to perform distributed sensor fusion, Specifically, it seeks to design and implement an onboard flight control and navigation system for NPS FROG UAV, which will be used as the autonomous airborne vehicle for the research, using the newly marketed ... |
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| A Neural Network Approach for Helicopter Airspeed Prediction |
MAR 2002 |
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| Authors:
Ozcan Samlioglu; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Conventional pitot-static airspeed measurement systems do not yield accurate measurements when aircraft speed is below 40 knots. Recent studies have demonstrated that neural network approaches for predicting airspeed are quite promising. In this thesis, a back-propagation neural network is used to predict the airspeed of UH-60A and OH-6A helicopters in the low speed environment. The input data to the neural networks were obtained using the FLIGHTLAB flight simulator. The results ... |
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| Instrument Scan Strategies of F-117A Pilots |
FEB 2002 |
16 pages |
| Authors:
David L. Brown; Holly S. Bautsch; Paul A. Wetzel; Gretchen M. Anderson; LOGICON TECHNICAL SERVICES INC DAYTON OH
|
| Eye tracking is an accurate and objective means of measuring an instrument scan pattern. The purpose of this study was to determine if prior aircraft experience, phase of flight, and autopilot mode modulated the instrument scan pattern of F-117A pilots. Twenty-three F-117A pilots, grouped by prior experience, flew an instrument approach manually and with autopilot while wearing and El Mar eye tracker in the F-117A simulator at Holloman AFB NM. ... |
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| Sliding Mode Control Applied to Reconfigurable Flight Control Design |
17 JAN 2002 |
15 pages |
| Authors:
Scott R. Wells; CALIFORNIA UNIV DAVIS
|
| Sliding mode control is applied to the design of flight control systems capable of operating with limited bandwidth actuators and in the presence of significant damage to the airframe and/or control effector actuators. Although inherently robust, sliding mode control algorithms have been hampered by their sensitivity to the effects of parasitic unmodeled dynamics, such as those associated with actuators and structural modes. It is known that asymptotic observers can alleviate ... |
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| Temperature-Altitude Tests for Missile System and Missile Subsystem Equipment |
08 JAN 2002 |
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| Authors:
WHITE SANDS MISSILE RANGE NM
|
| This TOP provides guidance for determining the ability of equipment under test to operate and the ability of the equipment materiel to withstand exposure to various temperature-altitude environments. Temperature-altitude tests are one of a series of possible environmental tests conducted to ensure the reliability of a missile system. The tests described herein include the probable extreme temperature-altitude conditions to which a missile system may be exposed. In addition, these tests ... |
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| Hierarchical System for Multiple-Agent Scenarios |
01 JAN 2002 |
9 pages |
| Authors:
H. J. Kim; David H. Shim; Shahid Rashid; Shankar Sastry; CALIFORNIA UNIV BERKELEY ELECTRONICS RESEARCH LAB
|
| This paper presents a hierarchical architecture for the coordination and control of autonomous agents performing intelligent team operations. Each team consisting of multiple aerial and ground vehicles, uses a coordinated strategy through communication via a wireless network. As an exemplary case study, a pursuit-evasion scenario is developed. This paper also introduces the experimental setup for aerial and ground-based autonomous agents. The proposed scheme is currently under development for near future ... |
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| Air-Ground Integration Experiment |
JAN 2002 |
218 pages |
| Authors:
Karen DiMeo; Randy Sollenberger; Parimal Kopardekar; Sandy Lozito; Margaret-Anne Mackintosh; WILLIAM J HUGHES TECHNICAL CENTER ATLANTIC CITY NJ
|
| The concept of free flight is intended to provide increased flexibility and efficiency throughout the global airspace system. This idea could potentially shift aircraft separation responsibility from air traffic controllers to flight crews creating a 'shared-separation' authority environment. A real-time, human-in-the-loop study was conducted using facilities at NASA Ames Research Center and the FAA William J. Hughes Technical Center. The goal was to collect data from controllers and pilots on ... |
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| Piloted Simulator Investigation of Techniques to Achieve Attitude Command Response with Limited Authority Servos |
JAN 2002 |
68 pages |
| Authors:
David L. Key; Robert K. Heffley; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCHCENTER
|
| The purpose of the study was to develop generic design principles for obtaining attitude command response in moderate to aggressive maneuvers without increasing SCAS series servo authority from the existing +/- 10%. In particular, to develop a scheme that would work on the UH-60 helicopter so that it can be considered for incorporation in future upgrades. The basic math model was a UH- 60A version of GENHEL. The simulation facility ... |
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| Effects of Primary Flight Symbology on Workload and Situation Awareness in a Head-Up Synthetic Vision Display |
2002 |
11 pages |
| Authors:
Michael P. Snow; Guy A. French; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
|
| Precision navigation, display, and avionics technologies have progressed to the point that a head-up primary flight display incorporating synthetic elements such as terrain and commanded flight path is a possibility in the near future. The goal of such a display is to increase situation awareness and reduce aircrew reliance on warning systems or automation to prevent controlled flight into terrain (CFIT) mishaps. The primary flight display- and primary focus of ... |
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| Control Allocation for the Next Generation of Entry Vehicles |
07 DEC 2001 |
116 pages |
| Authors:
Richard H. Shertzer; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF AERONAUTICS AND ASTRONAUTICS
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| Control allocation is the process of assigning control responsibility amongst redundant actuators. A control allocation algorithm for an entry vehicle is presented that uses a linear program to optimally specify bounded aerosurface deflections and jet firings in response to torque commands. Actuator preference is introduced via an objective function to produce a unique solution when the system of linear equations is underdetermined. A multivariable control law is adopted to drive ... |
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| Flying Qualities Flight Testing of Digital Flight Control Systems. Flight Test Techniques Series - Volume 21 (les Essais en vol des performances des systemes de ommande de vol numeriques) |
DEC 2001 |
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| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
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| This document covers the basics of flying qualities flight testing for digital flight control systems. Most of the techniques and subjects discussed also apply to analog systems as well. The techniques discussed are by no means the only techniques available, nor are they necessarily applicable to every flight test program. Rather, they are a collection of best practices from organizations across NATO, which practice the subject matter. The author hopes ... |
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| Tower Cab Metrics |
DEC 2001 |
29 pages |
| Authors:
Randy L. Sollenberger; Pamela S. Rocco; FEDERAL AVIATION ADMINISTRATION TECHNICAL CENTER ATLANTIC CITY NJ
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| This report is part of a continuing effort to develop human factors measures for different operational environments in the Federal Aviation Administration Air Traffic Control (ATC) system. Previous research at the William J. Hughes Technical Center Research Development and Human Factors Laboratory has focused on measures for the Terminal Radar Approach Control and en route radar environments (e.g., Sollenberger, Stein, & Gromelski, 1997; Vardaman & Stein, 1998). This work focuses ... |
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| Supporting Battlefield Situation Assessment Through Attention Guidance and Diagnostic Aiding: A Cost-Benefit and Depth of Processing Analysis |
DEC 2001 |
69 pages |
| Authors:
William J. Horrey; Christopher D. Wickens; ILLINOIS UNIV AT URBANA-CHAMPAIGN SAVOYAVIATION RESEARCH LAB
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| Automated support systems may be useful tools for aiding situation assessment in complex environments such as the military battlefield, medical diagnosis, and crisis management. These environments are marked by large amounts of information which often must be weighted and integrated into a meaningful judgment or assessment. Two experiments examined the effects of attention cueing and decision aiding on information integration tasks in static battlefield situations. In the first experiment, sixteen ... |
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| Development of Design Methodologies for Robust, Adaptive Autonomous Hierarchical Systems: Final Report |
15 NOV 2001 |
30 pages |
| Authors:
B. D. Anderson; T. S. Brinsmead; J. Davoren; T. Moor; M. Smith; AUSTRALIAN NATIONAL UNIV CANBERRA DEPTOF SYSTEMS ENGINEERING
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| This report describes the research outcomes from a three year study of methodologies to secure robust behaviour of nonlinear systems with high speed adaptation capability and principles for control architectures with self- organizing adaptive capabilities appropriate for use in intelligent, autonomous, unmanned air vehicles. |
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| JSASS International Sessions (15th) in Aircraft Symposium (39th) held in Gifu, Japan on 29-31 Oct 2001 |
31 OCT 2001 |
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| Authors:
NATIONAL AEROSPACE LAB TOKYO (JAPAN)
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| The 15th International Session of the Japan Society of Aeronautical and Space Sciences was held 29-31 Oct 2001 in Gifu Japan. It incorporated the 2nd Japan-Korea Aeronautical Technology Symposium. Thirty-nine papers are included in the proceedings. Topical sessions included: Guidance Navigation and Control, Development, Fluid Dynamics and Propulsion, fluid Dynamics, Guidance and Control, Structure, Structure and Aeroelasticity. |
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| Simultaneous Offset Instrument Approaches at Newark International Airport: An Airspace Feasibility Study |
OCT 2001 |
43 pages |
| Authors:
Sherri Magyarits; Parimal Kopardekar; Nicole Sacco; Kevin Carmen; FEDERAL AVIATION ADMINISTRATION ATLANTIC CITY NJ AIRPORT AND AIRCRAFT SAFETY RESEARCH AND DEVELOPMENT
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| A real-time human-in-the-loop study of simultaneous offset instrument approaches (SOIA) was conducted at the William J. Hughes Technical Center in Atlantic City, NJ, August 14 through 17, 2000. The purpose of the study was to assess the operational feasibility of Air Traffic Control to support dual feed operations to Newark International Airport (EWR) with a straight-in approach to Runway 4R and an offset localizer directional aid with glideslope approach to ... |
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| Human Factors Design Guidelines for Multifunction Displays |
OCT 2001 |
77 pages |
| Authors:
Sig Mejdal; Michael E. McCauley; Dennis B. Beringer; MONTEREY TECHNOLOGIES INC MONTEREY CA
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| References related to the design of multifunction displays are summarized into a series of human factors design guidelines. These are presented in a number of sections, which include: general guidelines, the design process, air traffic displays, weather displays, navigation displays, MFD menu organization, automation, individual displays, and general design principles for aircraft displays. Particularly relevant data graphs are included to illustrate some of the recommendations. These sections are followed by ... |
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| Biologically Inspired Direct Adaptive Guidance and Control for High- Bandwidth Flight Systems |
15 JUL 2001 |
34 pages |
| Authors:
Eric Corban; Cole Gilbert; Anthony Calise; Allen Tannenbaum; GUIDED SYSTEMS TECHNOLOGIES MCDONOUGH GA
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| The capability of biological flight systems to autonomously maneuver, track, and pursue evasive targets in a cluttered environment is vastly superior to current engineered systems. The reported effort seeks to fully characterize the tracking, guidance and control functions of one such biological system (the male flesh fly in pursuit of the female), and to use the developed understanding to improve the design of engineered guidance and control systems for small ... |
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Flight Control and Instrumentation
