| Pilot-In-The-Loop Evaluation of the Approach Procedures Expert System (APES) |
30 JUL 97 |
104 pages |
| Authors:
Mona L. Toms; Joseph J. Cavallaro; Scott M. Conem; Frank W. Moore; Airam Gonzalez-Garcia; VEDA INC DAYTON OH
|
 | The Vehicle-Pilot Integration Branch of Wright Laboratory(WL/FIGP) conducted a pilot-in-the-loop study to evaluate the utility of a prototype decision aid, the Approach Procedures Expert System (APES), to support the pilot's use of electronic approach plates in flying instrument approaches. This report describes the APES decision aid and the methodology and results of the Vehicle-Pilot Integration Branch's pilot-in-the-loop evaluation of the APES. The objectives of the study were to assess: (1) ... |
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| Feasibility Assessment and Optimization Study of Smart Actuation Systems for Enhanced Aircraft Maneuver Performance |
JUL 97 |
36 pages |
| Authors:
K. Appa; J. Ausman; NORTHROP GRUMMAN CORP EL SEGUNDO CA MILITARY AIRCRAFT SYSTEMS DIV
|
| This report presents an analytical method developed to assess the power requirement and placement of the solid state actuators for enhanced maneuver performance of tactical fighters. Optimal control methodology is employed to compute the input stimuli such that the total power requirement is minimum with reduced peak stress levels. The study suggests that solid state actuators require some form of mechanical magnification of displacement for reduced control actuation power. ... |
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| Nonlinear Control of Mechanical Systems in the Presence of Magnitude and Rate Saturation |
13 JUN 97 |
3 pages |
| Authors:
Richard M. Murray; CALIFORNIA INST OF TECH PASADENA MECHANICAL ENGINEERING LAB
|
| This report describes recent analytical and experimental results on nonlinear control of systems with simultaneous magnitude and rate saturations. |
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| Microfabricated Ice-Detection Sensor |
JUN 97 |
12 pages |
| Authors:
Russell G. DeAnna; Mehran Mehregany; Shuvo Roy; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER
|
| Knowledge of ice conditions on important aircraft lift and control surfaces is critical for safe operation. These conditions can be determined with conventional ice detection sensors, but these sensors are often expensive, require elaborate installation procedures, and interrupt the airflow. A micromachined, silicon based, flush mounted sensor which generates no internal heat has been designed, batch fabricated, packaged, and tested. The sensor is capable of distinguishing between an ice covered ... |
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| CONDUIT - A New Multidisciplinary Integration Environment for Flight Control Development |
JUN 97 |
25 pages |
| Authors:
Mark B. Tischler; Jason D. Colbourne; Mark R. Morel; Daniel J. Biezad; William S. Levine; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER
|
| A state-of-the-art computational facility for aircraft flight control design, evaluation, and integration called CONDUIT (Control Designer's Unified Interface) has been developed. This paper describes the CONDUIT tool and case study applications to complex rotary- and fixed- wing fly-by-wire flight control problems. Control system analysis and design optimization methods are presented, including definition of design specifications and system models within CONDUIT, and the multi-objective function optimization (CONSOL-OPTCAD) used to tune the ... |
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| Transfer of Training Effectiveness of Personal Computer-Based Aviation Training Devices |
MAY 97 |
24 pages |
| Authors:
Henry L. Taylor; Gavan Lintern; Charles L. Hulin; Donald Talleur; Tom Emanuel; ILLINOIS UNIV AT URBANA-CHAMPAIGN SAVOY INST OF AVIATION
|
| The training effectiveness of Personal Computer-Based Aviation Training Devices (PCATDs) has received only limited testing. In the experiment reported here, a commercially available PCATD was evaluated in a transfer of training experiment for its effectiveness in supporting instrument flight training. The data show levels of savings in airplane flight time that varied from 15% to over 40% for certain training exercises. However, there were also cases in which savings were ... |
|
| Flightfax; Army Aviation Risk-Management Information. Volume 25, Number 7, April 1997. Spatial Disorientation |
APR 1997 |
12 pages |
| Authors:
ARMY SAFETY CENTER FORT RUCKER AL
|
| Basic to any discussion of spatial-disorientation controls is recognizing that there are two types of SD. The challenge of Type 1 SD is to find a way to apply controls (the appropriate course of action) when you are unaware that you are in an SD situation. The challenge of Type 2 SD is to apply the right controls to the specific SD situation. Identifying appropriate controls for both types of ... |
|
| Wright Laboratory Success Stories: A Review of 1996 |
APR 97 |
203 pages |
| Authors:
WRIGHT LAB WRIGHT-PATTERSON AFB OH
|
| Success stories from 1996 that recognize the accomplishments and combined efforts of Wright Laboratory Scientists and Engineers. Stories have been selected from the following categories: (1) Technology Transition, technology that has achieved application on a DoD system in development or operation; (2) Technology Transfer, technology transferred from the laboratory to the private sector; (3) Technical Advancement, major innovative technological advancements that offer significant potential for existing & future AF systems, ... |
|
| Military Airlift: Savings Achievable by Eliminating Support Operations at Torrejon Air Base, Spain |
APR 97 |
22 pages |
| Authors:
GENERAL ACCOUNTING OFFICE WASHINGTON DC NATIONAL SECURITY AND INTERNATIONAL A FFAIRS DIV
|
| The Department of Defense (DOD) increasingly relies on its global network of en route bases to provide logistical support to military airlift aircraft during contingencies. According to Air Mobility Command documents, two en route bases in Spain-Torrejon and Zaragoza-supported about 50 percent of the Air Mobility Command's airlift missions during Operations Desert Shield and Desert Storm. However, according to Spanish government officials, Torrejon Air Base's proximity to Madrid, the capital ... |
|
| Predictive Model of a Parachute Retraction Soft Landing System |
APR 97 |
58 pages |
| Authors:
Walter J. Krainski Jr; ARMY NATICK RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA
|
| The U.S. Army Soldier Systems Command's Natick Research, Development and Engineering Center (NRDEC) is currently examining a novel concept for reducing the impact shock sustained by airdropped payloads upon ground impact A device, called a parachute retractor, is placed between the payload and parachute confluence point, and when activated, accelerates the parachute and payload toward each other; slowing the payload prior to ground impact. The goal is to eliminate the ... |
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| Aircraft Multifunction Display and Control Systems: A New Quantitative Human Factors Design Method for Organizing Functions and Display Contents |
APR 97 |
46 pages |
| Authors:
Gregory Francis; Matthew J. Reardon; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The objectives of this study were to review the current state of aircraft multifunction display and control system (MPDCS) design methods and develop a quantitative method of designing MFDCSs that incorporate important human factors issues. Reports in the literature indicate that MFDCS design can influence flight performance. However, current design methods rely primarily on the designer's intuition and experience. MFDCSs in aircraft cockpits use computer-generated graphics and symbology that have ... |
|
| The Referred Weight Flight Test Technique Applied to First of Class Flight Trials |
APR 97 |
|
| Authors:
A. M. Arney; DEFENCE SCIENCE AND TECHNOLOGY ORGANIZATION CANBERRA (AUSTRALIA)
|
 | The referred weight flight test technique has been used by the RAN to establish Ship Helicopter Operating Limits for a number of years. This technique involves keeping the referred weight, defined as aircraft weight divided by density ratio, constant for a given flight test. The validity of using this technique has been questioned within the RAN, specifically with respect to its relevance and application to power and flight control margins. ... |
|
| The Effects of Elevator Rate Limiting and Stick Dynamics on Longitudinal Pilot-Induced Oscillations |
MAR 97 |
147 pages |
| Authors:
Patrick J. Peters; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| This report presents the results of an investigation into the effects of elevator rate limiting and stick dynamics on longitudinal pilot-induced oscillations (PIO). A simulation study was conducted to prepare for the flight test, but also to gain insight into the effects of rate limiting and stick dynamics. Due to the non-numerical nature of the simulation results, a flexible three-phase flight test plan was developed, first varying the rate limits, ... |
|
| Modern Flight Control Design, Implementation, and Flight Test |
MAR 97 |
141 pages |
| Authors:
Phillip T. Edwards; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| This thesis addresses the application issues raised implementing flight control designs derived from optimal control theory and the challenges in obtaining acceptable handling qualities when using these techniques. Using the USAF TPS FCS project as the controller architecture, four controllers were designed using classical methods, and H2, H3, and mixed H2/H optimal control theory. These designs were implemented in the Calspan VSS II Learjet, simulating unstable aircraft longitudinal dynamics and ... |
|
| Stick and Feel System Design (Systemes de Restitution des Efforts au Manche) |
MAR 97 |
|
| Authors:
J. C. Gibson; R. A. Hess; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)
|
| Since the earliest days of manned flight, designers have to sought to assist the pilot in the performance of tasks by using stick and feel systems to bring these tasks within the bounds of human physical capabilities. This volume describes stick and feel systems in two parts. Part one describes the technologies which have been developed throughout the history of 20th Century aviation. Part two describes how modern systems dynamics ... |
|
| Effect of Incompatible Light on Modified Class B Night Vision Goggle- Aided Visual Acuity and Contrast Sensitivity |
FEB 97 |
28 pages |
| Authors:
Randall W. Gibb; Jack D. Reising; HUGHES TRAINING INC MESA AZ TRAINING OPERATIONS DIV
|
| MIL-L-85762A, Lighting, Aircraft, Interior, Night Vision Imaging System (NVIS) Compatible, defines criteria for assessing night vision goggle (NVG) compatibility of cockpit lighting. As part of the assessment procedures, NVG aided visual acuity (VA) is measured using the USAF Tri-Bar Chart. A cockpit light is incompatible if NVG aided VA is degraded. An alternative method of measuring NVG aided VA uses an NVG Chart. This research assessed whether the two NVG ... |
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| Manual Tracking Flight Control with Amplitude and Rate Constrained Dynamic Actuators |
JAN 97 |
149 pages |
| Authors:
Russel B. Miller; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| A new control methodology for manual flight control, viz., real-time tracking control, is developed. Amplitude and rate constrained dynamic actuators are considered. Optimal tracking control is made possible by the use of unique reference signal prediction strategies which extrapolate the reference signal over the optimization horizon. A receding horizon, linear-quadratic inner-loop controller is employed in conjunction with an outer-loop nonlinear element. The constraint effects mitigation strategy is to optimally track ... |
|
| Limited Handling Qualities Evaluation of Augmented Longitudinal Flight Control Systems Designed with State-Space Optimization Techniques (HAVE INFINITY) |
JAN 97 |
81 pages |
| Authors:
Phillip T. Edwards; Philip R. Fittante; Tony DeLiberato; Steven P. Snyder; Thomas W. Yarger; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
|
| This technical report presents the results of a limited handling qualities evaluation of augmented longitudinal flight control systems designed with state-space optimization techniques. The objective of the test was to evaluate the handling qualities of four longitudinal flight control systems during the approach and landing phase of flight. Three of the flight control systems used state-space design techniques and the fourth used classical design techniques. The four flight control systems ... |
|
| Lessons Learned from Utilizing PEMs in a Flight/Safety Critical System |
1997 |
11 pages |
| Authors:
Brian Jones; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| In 1997 the Naval Air Systems Command F/A-18 Flight Control Team was tasked with redesigning the Flight Control Computer's processor card. This was mainly due to parts obsolescence. The old processor incorporated mid-SOs technology. The processor card contract was awarded to the current computer manufacturer. Issues raised due to the obsolescence of military rated ceramic microcircuits: Design options limited using only MIL parts or PEMs ... |
|
| Technology and the Air Force: A Retrospective Assessment |
1997 |
341 pages |
| Authors:
Jacob Neufeld; Jr. Watson George M.; David Chenoweth; AIR FORCE HISTORICAL STUDIES OFFICE BOLLING AFB DC
|
| The history of the United States Air Force is inextricably bound up in the history of aerospace technology. Major revolutions have influenced the evolution of Air Force capabilities and systems, most notably those of atomic weaponry, the turbojet revolution, supersonic flight, avionics, aerial refueling, space flight, precision weaponry, electronic flying controls, composite materials, and stealth. It is worthwhile to take a retrospective look at some of the aerospace challenges and ... |
|
| Multiple Model Adaptive Estimation and Control Redistribution for the Vista F-16 |
DEC 96 |
247 pages |
| Authors:
Robert W. Lewis Sr; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| Performance characteristics of a Multiple Model Adaptive Estimation and Control Redistribution (MMAE/CR) algorithm are evaluated against single and double actuator and sensor failures. MMAE alone can compensate for sensor failures, whereas Control Redistribution compensates for actuator failures by redistributing commands, initially intended for failed actuators, to the unfailed actuators in such a way that the desired system response is achieved. Both failure detection and compensation capabilities are developed and analyzed ... |
|
| Development and Performance of a Cockpit Control System Operated by Voice: Summary Report of Project DMKLu/ACO2/A/9lO5 |
29 NOV 96 |
|
| Authors:
H. J. Steeneken; HUMAN FACTORS RESEARCH INST TNO SOESTERBERG (NETHERLANDS)
|
| Phase 3 of this project is concerned with the evaluation of an automatic speech recognizer for cockpit control functions in the MLU-F16. The report is a summary of the following 3 reports: (1) Automatic speech recognition performance in a simulation-based fast-jet cockpit application, (2) Spontaneous- speech data base for cockpit control applications applied to commercial state- of-the-art speech recognition technology, and (3) Evaluation of integrated automatic speech recognition on the ... |
|
| Automatic Speech Recognition Performance in a Simulation-Based Fast-Jet Cockpit Application (Automatische spraakherkenning toegepast voor controletaken in de cockpit van een jachtvliegtuig) |
28 NOV 96 |
|
| Authors:
H. J. Steeneken; J. J. Kriekaard; D. A. van Leeuwen; HUMAN FACTORS RESEARCH INST TNO SOESTERBERG (NETHERLANDS)
|
| A project on automatic speech recognition for control of systems in a fast-jet cockpit was conducted by the TNO Human Factors Research Institute (TNO- HFRI) and the National Aerospace Laboratory (NLR). The project comprised performance testing in an advanced fast jet simulator. In total the results of 17 sorties, performed by three experienced pilots, are presented. During each sortie the pilot had access to a control by voice of radio ... |
|
| Neural Network Based Helicopter Low Airspeed Indicator |
24 OCT 1996 |
40 pages |
| Authors:
Carl Schaefer Jr.; David Haas; Kelly McCool; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| This invention relates generally to virtual sensors and, more particularly, to a means and method utilizing a neural network for estimating helicopter airspeed at speeds below about 50 knots using only fixed system parameters (i.e., parameters measured or determined in a reference frame fixed relative to the helicopter fuselage) as inputs to the neural network. |
|
| New Developments Abroad in Space Flight Control Technology |
01 OCT 96 |
27 pages |
| Authors:
Zugui Chen; NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| This article introduces achievements over the past few years and the direction of developments in the major fields involving space control technology at the 12th Conference on Space Automated Control. It emphasizes a description of ground testing technology of space vehicle GNC systems, space vehicle autonomous control technology, space robot technology and mechanical arm technology as well as flexible space vehicle control technology and GPS navigation technology. Finally it concludes ... |
|
| Achieving Near-Optimal Sensor Allocation Policies Through Reinforcement Learning |
OCT 96 |
11 pages |
| Authors:
P. Malhotra; WRIGHT LAB WRIGHT-PATTERSON AFB OH
|
| TACTICAL AIRCRAFT MUST FREQUENTLY PERFORM COMPLEX SEQUENTIAL TASKS IN WHICH THEY RELY HEAVILY ON THE INTEGRATION OF SENSORY DATA TO ASSESS STATE AND MAINTAIN SITUATIONAL AWARENESS. IN MODERN SYSTEMS, THE CONTROL OF THE SENSORS' INFORMATION-GATHERING ACTIVITIES IS CRITICAL-OPTIMAL PERFORMANCE IS DESIRED. BUT THIS IS MADE DIFFICULT BY THE REQUIREMENTS TO CONTEND WITH SOPHISTICATED FLEXIBLE SENSORY ASSETS, AND VOLATILE, UNCERTAIN ENVIRONMENTS. THIS PAPER INTRODUCES THE SENSOR MANAGEMENT PROBLEM AND THE PLAUSIBILITY ... |
|
| Flight Inspection Crew Resource Management Training Needs Analysis |
SEP 96 |
17 pages |
| Authors:
Lawrence L. Bailey; Rogers V. Shaw; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF AVIATION MEDICINE
|
| On October 26, 1993, there was a fatal crash of a Federal Aviation Administration (FAA) flight inspection aircraft. During the accident investigation, the National Transportation Safety Board (NTSB) cited ineffective crew resource management (CRM) as one of the causal factors and recommended CRM training for flight inspection aircrews. As part of the FAA's response to the NTSB recommendation, a CRM training needs analysis was conducted. Cluster analytic results of the ... |
|
| A Historical Perspective of Aircrew Systems Effects on Aircraft Design |
SEP 96 |
112 pages |
| Authors:
David O. Bauer; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The design of the aircrew workstation often has not been an orderly part of the overall aircraft design process but rather of much lower priority than the integration of the airframe and powerplant. However, the true test of the aircraft is how well the aircrew can use the aircraft for mission performance. NAVAIR has been seeking the establishment of an Aircrew Centered System Design discipline, to be addressed as an ... |
|
| Gain-Scheduled Aircraft Control Using Linear Parameter-Varying Feedback |
JUN 96 |
218 pages |
| Authors:
Martin R. Breton; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Systems which vary significantly over an operating envelope, such as fighter aircraft, generally cannot be controlled by a single linear time- invariant controller. As a result, gain-scheduling methods are employed to design control laws which can provide the desired performance. This thesis examines a relatively new approach to gain-scheduling, in which the varying controller is designed from the outset to guarantee robust performance, thereby avoiding the disadvantages of point designs. ... |
|
| Aircraft Avionics Nonsupportability and Microcircuit Obsolescence |
02 MAY 96 |
11 pages |
| Authors:
Donald L. Nedresky; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| The declining military budget has resulted in service life extensions for many weapons systems. Conversely, mission essential systems, such as the avionics suite, on naval aircraft extend, must contend with the scheduled phase out of subcomponents and microcircuits over the next few years. This unplanned obsolescence will have a costly impact on the ability of naval aviation to maintain weapons systems in a high state of operational readiness. Identifying the ... |
|
| Application of Multivariable Control Theory to Aircraft Control Laws. Final Report: Multivariable Control Design Guidelines |
MAY 1996 |
286 pages |
| Authors:
HONEYWELL INC MINNEAPOLIS MN
|
| THE RESEARCH COVERED IN THIS REPORT IS A RESULT OF THE TASKS IN THE CONTROL APPLICATION OF MULTIVARIABLE CONTROL THEORY TO AIRCRAFT CONTROL LAWS. THE REPORT IS WRITTEN TO PROVIDE GUIDELINES TO HELP CONTROL LAW DESIGNERS USE MULTIVARIABLE CONTROL THEORY FOR AIRCRAFT CONTROLS. THE REPORT IS ORGANIZED INTO THREE PARTS. THE FIRST INCLUDES DISCUSSIONS ON VARIOUS CONTROL METHODOLOGIES AND PRESENTATION OF FUNDAMENTALS OF CONTROL. THE SECOND DISCUSSES THE DESIGN AND ... |
|
| Flight and Ground Testing of New Flight Control Software for the F/A-18 Hornet |
17 APR 96 |
23 pages |
| Authors:
C. J. Loria; Evin Beck; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| Our briefing will cover the: (1) F/A-18 Aircraft; (2) An overview of the Hornet's Flight Control System; (3) A brief synopsis of selected flight controls system related mishaps; (4) Our testing of the software, or 'Operational Flight Program' which in a highly augmented, fly-by-wire aircraft constitutes a new flight control system; and (5) Results and Conclusions. And a brief overview of lessons learned. |
|
| Wright Laboratory Success Stories. A Review of 1995 |
APR 96 |
127 pages |
| Authors:
WRIGHT LAB WRIGHT-PATTERSON AFB OH
|
| Success stories from 1995 that recognize the accomplishments and combined effort of Wright Laboratory scientists and engineers. Stories have been selected from the following categories: TECHNOLOGY TRANSITION -- Technology that has achieved application on a Department of Defense system in development or operation or that has provided 'quick-reaction' response to problems or needs of field organizations; TECHNOLOGY TRANSFER -- Technology that has transferred from the laboratory to the private sector, ... |
|
| Evaluation of Approach Path Indicator Systems for Heliports |
APR 96 |
237 pages |
| Authors:
Keith Bagot; FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF AVIATION RESEARCH
|
| The objective of this report was to determine the acceptability of using existing approach path indicator technology to develop the criteria for establishing production and installation requirements for approach path indicators for heliports. The approach path indicators give the pilot a visual reference as to his proximity to a specific approach angle to the heliport in visual flight rule (VFR) landing operations. This effort required photometric testing for actual light ... |
|
| Aircraft Control Lever Simulator. |
19 MAR 1996 |
|
| Authors:
G. T. Thomas; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An aircraft throttle simulator comprises throttle lever which extend upwardly from spheres fractionally clamped between plates. The levers are constrained for movement in a pattern allowing for forward movement from an idle position to a full throttle position, a lateral shift from the full throttle position, and forward movement to an afterburner position. A linkage is provided to connect each lever to a linear transducer to provide a position signal. ... |
|
| Three-Dimensional Auditory Localization as a Cue for Spatial Orientation in Aircraft |
MAR 96 |
58 pages |
| Authors:
Mica R. Endsley; S. A. Rosiles; Hua Zhang; Jose Macedo; TEXAS TECH UNIV LUBBOCK DEPT OF INDUSTRIAL ENGINEERING
|
| The use of technology which provides spatially localizable auditory cues through headphones is proposed as a means of providing supplemental information to pilots on the spatial orientation of an aircraft. This technique shows promise for reducing accidents due to spatial disorientation associated with high visual load. An Auditory Head up Display (HUD) was developed that provides realtime aircraft pitch and roll indications in the form of spatially localized auditory tones. ... |
|
| Spatial Disorientation: A Survey of U.S. Army Rotary-Wing Aircrew |
MAR 96 |
106 pages |
| Authors:
Simon J. Durnford; Shannon L. DeRoche; Jennifer P. Harper; Lester A. Trudeau; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| A survey of 299 aircrew in current flying' practice was performed at five U.S. Army airfields within CONUS. Respondents were asked a number of questions about their worst ever episode of spatial disorientation (SD) and their worst episode in the 4 months prior to the survey. They also were asked to classify episodes as minor, significant, or severe according to the threat to flight safety. Opinions also were sought on ... |
|
| Economic Analysis of Local Area Augmentation System and Alternative Architectures |
MAR 96 |
70 pages |
| Authors:
Anand S. Prabhakar; TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MA
|
| The objective of this study has been to perform an economic comparison by conducting a cost-benefit analysis (CBA) of five Local Area Augmentation System (LAAS) and alternative architectures. The five architectures chosen by the FAA for the study are: Pseudolite Kinematic LAAS, Wide-Lane Kinematic LAAS, Code-Based LAAS, instrument Landing System (ILS), and the LAAS- Glide Slope System. A comparison of architectures based on the benefit/cost (B/ C) ratio and cost- ... |
|
| Flying Qualities Phase. Planning Guide |
MAR 96 |
319 pages |
| Authors:
AIR FORCE TEST PILOT SCHOOL EDWARDS AFB CA
|
| The purpose of this text is to provide an aid to the student for planning flights in the Flying Qualities Phase of the USAFTPS curriculum. In the Performance Phase, your evaluation of an aircraft tended to focus on objective data. Flying qualities flight test is much more than just comparing the results of a flight test to the applicable military standard. In the Flying Qualities (FQ) Phase, you will be ... |
|
| Innovative Control Effectors (ICE) |
MAR 1996 |
|
| Authors:
E. L. Roetman; S. A. Northcraft; J. R. Dawdy; BOEING DEFENSE AND SPACE GROUP SEATTLE WA
|
| This report describes a joint U.S. Air Force. U.S. Navy sponsored investigation of innovative aerodynamic control concepts for fighter aircraft without vertical tails. Land-based and carrier-based configurations were analyzed to determine the flying qualities, performance, and aircraft-level integration impacts of the innovative controls. Six control concepts were evaluated for their potential to provide sufficient lateral-directional control power to a highly maneuverable tailless fighter. They were: (1) split ailerons; (2) movable ... |
|
| Flight Controls V10.5.1 (Videorecording). |
14 FEB 1996 |
|
| Authors:
NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
|
| Physical description: 1 VHS video; 1/2 in.; col.; sd.; mono; 5 mins.; standard playback sp. |
|
| Qualification Guidelines for Personal Computer-Based Aviation Training Devices: Instrument Training |
FEB 96 |
73 pages |
| Authors:
Kevin W. Williams; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| This is a report of the analytical development of qualification guidelines for personal computer based aviation training devices (PCATDs) for use in instrument flight training. The report includes a task analysis of instrument flight tasks, along with baseline and task-specific guidelines that were developed as a result of the analysis. In addition a PCATD qualification tool is presented in the appendix for use in approving a Part 141 flight school ... |
|
| A Limited Evaluation of Predicting Pilot Opinion of Aircraft Handling Qualities in the Landing Phase of Flight Using the Control Anticipation Parameter and Bandwidth Criteria (HAVE CAP). |
JAN 1996 |
255 pages |
| Authors:
David A. Kivioja; Christopher C. McCann; Mark R. Schaible; David N. Larson; James C. McEachen; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
|
| This technical report presents the results of a limited evaluation of predicting pilot opinion of aircraft handling qualities in the landing phase of flight using the control anticipation parameter (CAP) and bandwidth criteria. The objective of this flight-test was to evaluate the validity of predicting pilot opinion using the CAP and bandwidth criteria. The CAP was defined as in MIL-STD-1797A, Flying Qualities of Piloted Aircrafl. The bandwidth criterion used the ... |
|
| Innovative Control Effectors (ICE) |
JAN 1996 |
410 pages |
| Authors:
Kenneth M. Dorsett; David R. Mehl; LOCKHEED MARTIN TACTICAL AIRCRAFT SYSTEMS FORT WORTH TX
|
| This report describes a joint U.S. Air Force - U.S. Navy sponsored investigation of innovative aerodynamic control concepts for fighter aircraft without vertical tails. Land-based and carrier-based configurations were analyzed to determine the flying qualities, performance, and aircraft-level integration impacts of the innovative controls. Five control concepts were evaluated for their potential to provide sufficient lateral-directional control power to a highly maneuverable tailless fighter. They were: (1) all-moving wing tip ... |
|
| Autopilot Control Strategies for Reducing Weapon Separation Transient Motion |
96 |
11 pages |
| Authors:
Ralph D. Ehrich; Mark N. Lamb; ROCKWELL INTERNATIONAL CORP DULUTH GA AUTONETICS MISSILES SYSTEMS DIV
|
| One of the essential elements in assessing the effectiveness of a weapon system is the determination of the separation characteristics of the weapon system from its release platform. The release platform can impart significant transient motion on the weapon due to flow field interference effects, This, in turn, can result in limitations in the employment envelope of the weapon system. When the AGM-130 air-to-ground missile system was integrated with the ... |
|
| Control of Slowly Varying LPV Systems: An Application to Flight Control |
96 |
9 pages |
| Authors:
Lawton H. Lee; Mark Sullivan; WRIGHT LAB WRIGHT-PATTERSON AFB OH
|
| Recent results in parameter-dependent control of linear parameter- varying (LPV) systems are applied to the problem of designing gain-scheduled pitch rate controllers for the F-16 VISTA (Variable-Stability In-Flight Simulator Test Aircraft). These methods, based on parameter-dependent quadratic Lyapunov functions, take advantage of known a priori bounds on the parameters' rates of variation (the bounds may themselves be parameter-varying). The controller achieves an induced-L2-norm performance objective; Level 1 flying qualities are ... |
|
| A Robust Gain-Scheduling Example User Linear Parameter-Varying Feedback |
96 |
21 pages |
| Authors:
Mark S. Spillman; Paul A. Blue; Siva S. Banda; WRIGHT LAB WRIGHT-PATTERSON AFB OH
|
| A gain-scheduling approach for uncertain Linear Parameter-Varying (LPV) systems with fixed linear fractional relationships on a parameter set is developed. The approach combines LPV theory based on Linear Matrix Inequalities (LMIs) and synthesis to form a new robust approach for large envelope control design. The new approach is used to design an automatically gain scheduled pitch-rate controller for the F-16 Variable Stability InFlight Simulator Test Aircraft (VISTA). The ability of ... |
|
| A Multiservice Switch for Advanced Avionics Data Networks |
1996 |
7 pages |
| Authors:
W. A. Rosen; W. A. Phipps; A. D. George; D. D. Turner; V. Gershman; M. P. Birmingham; NAVAL AIR WARFARE CENTER AIRCRAFT DIV WARMINSTER PA
|
| With knowledge of persistent data communication traffic patterns offered to an avionics data network, modifications to the routing through the network can be made to improve total throughput and bound the latency of packets. The Multiservice Switch (MSS) is such a route-optimizing switch for streaming sensor data. The MSS has two switching fabrics: packet switching and circuit switching. The packet-switching fabric routes small control and data packets between switch ports. ... |
|
| Center of Excellence in Rotorcraft Technology |
31 DEC 95 |
54 pages |
| Authors:
D. P. Schrage; E. A. Armanios; V. L. Berdichevsky; A. J. Calise; S. V. Hanagud; GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
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| Georgia Tech's research investigations during the reporting period focused on several analytical and experimental tasks in rotorcraft technology. In the area of Rotorcraft Aerodynamics, work continued on the development of numerical formulations for prediction of viscous flow over rotors and rotor-body combinations without resort to empirical or Lagrangian-based formulations for capturing the tip vortex. Experimental work in transient aerodynamic interactions were aimed at a new capability for, among others, a ... |
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| Distributed Optimization for Customized Aircraft Fleet Scheduling |
31 DEC 95 |
93 pages |
| Authors:
Kendall E. Nygard; NORTH DAKOTA STATE UNIV FARGO
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| DAKOTA is a software environment for aircraft scheduling. Important features of the system include an extended set partitioning algorithm for optimizing schedules, a geographic-based display subsystem, schedule editing tools, context-sensitive hyperhelp, and report writing facilities. The goal is to provide a system that can help users quickly produce aircraft schedules that efficiently utilize the available fleet. The manual schedule editing procedures and the optimizer work seamlessly, making the best of ... |
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Flight Control and Instrumentation
