| Cognitive Nonlinear Radar |
Jan 2013 |
18 pages |
| Authors:
Anthony Martone; David McNamara; Gregory Mazzaro; Abigail Hedden; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
 | In this report, a unique cognitive nonlinear radar (CNR) is introduced. Research and development efforts for the CNR are currently funded by the U.S. Army Research Laboratory (ARL). The CNR adapts to (1) an increasingly cluttered electromagnetic (EM) environment, a growing problem for ground-based and airborne radar systems; (2) multiple targets; and (3) other radar, communication, and electronic systems that must operate without interfering with each other. The CNR uses ... |
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| FASTRAC Data Processing |
05 May 2012 |
28 pages |
| Authors:
Glenn E Lightsey; TEXAS UNIV AT AUSTIN
|
| The Formation Autonomy Spacecraft with Thrust, Relnav, Attitude, and Crosslink (FASTRAC) satellites were launched on November 19, 2010 from Kodiak, AK as part of the Space Test Program STP-S26 launch aboard a Minotaur IV rocket. Throughout the first six months of operations the satellites underwent an extensive check out period ensuring all subsystems were working nominally. During the first year of operations, enough data has been gathered to show that ... |
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| Durability of MWCNT Composites under Electron and Neutron Irradiation |
22 Mar 2012 |
108 pages |
| Authors:
Quan T Lu; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Electromagnetic interference shielding effectiveness and conductive properties of carbon nanotube containing composites intended for use as satellite surface materials have been investigated following electron and neutron irradiation. The MWCNT composites were irradiated to fluence levels of 1016 electrons/cm2 with 500 keV electrons. Increase in EMI-SE and conductivity was observed following electron irradiation in two of the samples. The sample with alternating layers of MWCNT and glass had a decrease in ... |
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| Low Frequency Material Characterization of Thin Substrates in a Coaxial Transmission Line |
22 Mar 2012 |
95 pages |
| Authors:
Lee B Cole; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research analyzes the complex permittivity and permeability of thin material samples at low frequencies in the presence of large outer air gaps. It uses the modal method developed in previous research to account for the errors introduced to the system by the presence of higher order modes excited by the air gaps. The theoretical scattering parameters returned by the modal method are compared to the measured scattering parameters and ... |
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| Joint Electromagnetic Spectrum Management Operations |
20 Mar 2012 |
103 pages |
| Authors:
JOINT CHIEFS OF STAFF WASHINGTON DC
|
| Military operations are complicated by increasingly complex demands on the electromagnetic spectrum (EMS). All modern forces depend on the EMS. The EMS is a physical medium through which joint forces conduct operations. The importance of the EMS and its relationship to the operational capabilities is the key focus of joint electromagnetic spectrum management operations (JEMSMO). The EMS is a highly regulated and saturated natural resource. The EMS includes the full ... |
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| Electromagnetic Interference Behavior of Multiwall Carbon Nanotubes and Carbon Nanofibers Composites Under Fatigue |
Mar 2012 |
151 pages |
| Authors:
Peter A Hunt; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The United States military is researching the use of nanocomposite materials for structural applications on space vehicle systems. To reduce vehicle weight and mitigate the electromagnetic interference (EMI) brought on by the harsh space environment, today's space vehicles are made of composites coated with expensive conductive materials. Research on composites made of carbon nanotubes (CNT) and carbon nanofibers (CNF) has shown better EMI shielding performance with these materials compared to ... |
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| Camp Beale Live-Site UXO Data Inversion and Classification Using Advanced EMI Models |
Nov 2011 |
25 pages |
| Authors:
Fridon Shubitidze; Irma Shamatava; Jon Miller; Joe Keranen; Alex Bijamov; Benjamin Barrowes; DARTMOUTH COLL HANOVER NH THAYER SCHOOL OF ENGINEERING
|
| The advanced EMI and statistical classification models are applied to the cued data sets of the Metal Mapper and two next-generation portable sensors: MPV and 2x2 3D TEMTADS. The advanced models combine: (1) the joint diagonalization (JD) algorithm for estimating the number of potential anomalies from the measured data without inversion, (2) the orthonormalized volume magnetic source (ONVMS) model for representing the EMI responses and extracting the intrinsic parameters (feature ... |
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| Evaluation of Nanocomposites for Shielding Electromagnetic Interference |
Sep 2011 |
105 pages |
| Authors:
Kenneth Y Chong; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Numerous efforts are ongoing to research and develop nanocomposite materials for space applications. Current composite spacecraft materials are nonconductive and require costly shielding materials to be applied in order to protect spacecraft from the harmful effects caused by electromagnetic interference (EMI), which is a by-product of exposure to the space environment. Conductive fillers (nanofibers) are being employed in composites to produce nanocomposites to reduce the dry weight of space vehicles ... |
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| Programming Models for Heterogeneous Multicore Systems |
08 Aug 2011 |
9 pages |
| Authors:
Jesus J Labarta; BARCELONA SUPERCOMPUTING CENTER BARCELONA (SPAIN)
|
| This report results from a contract tasking BSC as follows. The objective of this grant was to study a programming model and performance analysis tools to productively exploit the parallelism in multicore systems. The work is based on the StarSs programming model proposal by BSC and the performance analysis tools also developed at BSC, The focus was on three areas: 1) Intelligent analysis techniques in performance data analysis, 2) Locality ... |
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| Revolutions in Science and Technology: Future Threats to US National Security |
Apr 2011 |
176 pages |
| Authors:
Dallas Boyd; Lisa Andivahis; Jeffrey R Cooper; Stephen J Lukasik; Victor Oancea; George W Ullrich; SCIENCE APPLICATIONS INTERNATIONAL CORP MCLEAN VA
|
| The accompanying report provides a framework for evaluating S&T developments through the lens of their national security implications. This framework allows analysts to assess postulated technologies using a multi-tiered filtering process. The process consists first of a determination of whether the technology qualifies as a weapon of mass effect, a term for which a new definition is provided. The next step assesses whether the technology possesses various qualities that would ... |
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| Advanced Computational Methods for Study of Electromagnetic Compatibility |
31 MAR 2011 |
18 pages |
| Authors:
Oscar Bruno; Catalin Turc; MATHEMATICAL SYSTEMS AND SOLUTIONS INC PASADENA CA
|
| We have developed a variety of electromagnetic scattering solvers whose combined use enables solution of a wide range of problems in the field of electromagnetic compatibility. In particular, we 1) Developed surface integral equations for homogeneous and isotropic dielectric bodies whose bounding surfaces can contain corners and edges, and that incorporate regularizations which give rise to favorable eigenvalue distributions and small numbers of GMRES iterations; 2) Implemented a fast high-order ... |
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| Standardized UXO Technology Demonstration Site Scoring Record No. 934 |
MAR 2011 |
68 pages |
| Authors:
Stephen J. McClung; William Burch; Leonard Lombardo; Rick Fling; Christina McClung; ARMY DEVELOPMENTAL TEST COMMAND ABERDEEN PROVING GROUND MD
|
| This scoring record documents the efforts of the Environmental Security Technology Certification Program to detect and discriminate inert unexploded ordnance (UXO) utilizing the APG Standardized UXO Technology Demonstration Site calibration lanes and open field sites. This Scoring Record was coordinated by J. Stephen McClung and the Standardized UXO Technology Demonstration Site Scoring Committee. Organizations on the committee include the U.S. Army Corps of Engineers, the Environmental Security Technology Certification Program, ... |
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| COMPACFLT |
MAR 2011 |
10 pages |
| Authors:
William A. Somerville; PACIFIC FLEET PEARL HARBOR HI
|
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| AESOP 3.0 Highlights: Afloat Electromagnetic Spectrum Operations Program |
MAR 2011 |
23 pages |
| Authors:
Ken Fewell; SENTEL CORP ALEXANDRIA VA ENGINEERING AND AVIATION SERVICES
|
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| OPNAV - Year in Review |
MAR 2011 |
22 pages |
| Authors:
D. M. Johnson; Scott A. Hoschar; OFFICE OF THE CHIEF OF NAVAL OPERATIONS WASHINGTON DC
|
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| Navy and Marine Corps Spectrum Office Central Bahrain |
MAR 2011 |
28 pages |
| Authors:
NAVY AND MARINE CORPS SPECTRUM OFFICE CENTRAL FPO AE 09834
|
|
| Navy and Marine Corps Spectrum Offices (NMCSO) Status |
MAR 2011 |
16 pages |
| Authors:
Keith Van Blarcom; NAVY AND MARINE CORPS SPECTRUM OFFICE ATLANTIC NORFOLK VA
|
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| Offshore Renewable Energy Installations: Impact on Navigation and Marine Safety |
Jan 2011 |
4 pages |
| Authors:
Jr Detweiler George H; COAST GUARD WASHINGTON DC MARINE TRANSPORTATION SYSTEMS MANAGEMENT DIRECTORATE
|
| To reduce our dependence on foreign energy supplies, alternative or renewable energy sources are being pursued. These sources exploit a wide range of technologies: solar photovoltaics or power plants; hydroelectricity (dams); ocean thermal energy conversion facilities; and offshore renewable energy installations, which may include wind farms, marine current turbines, and wave generators (hydrokinetics). All these technologies have the potential to affect marine navigation and safety, and although no offshore renewable ... |
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| SAIC Analysis of Data Acquired at Camp Butner, NC |
Dec 2010 |
25 pages |
| Authors:
Dean Keiswetter; Bruce Barrow; Tom Bell; Jim Kingdon; Nagi Khadr; Jonathan Miller; Tom Furuya; SCIENCE APPLICATIONS INTERNATIONAL CORP (SAIC) CARY NC
|
| The Large Scale Classification Project at Camp Butner provides an excellent opportunity to compare and contrast classification performances for static and reconnaissance EMI data and for a variety of analysis approaches. SAIC analyzed EM61 data acquired in reconnaissance mode as well as Metal Mapper and TEMTADS data acquired while stationary. Our analysis included single- and multi-source solvers. Our classification utilizes a decision tree targeting the intrinsic polarizabilities. The decision tree ... |
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| The Role of Channel Distribution Information for Interference Management and Network Performance Enhancement |
03 NOV 2010 |
22 pages |
| Authors:
James R. Zeidler; Sagnik Ghosh; CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| One of the key technologies proposed for next generation commercial and military communications systems is the use of multiple antennas at both the transmitting and receiving nodes of the network. The additional antenna elements provide degrees of freedom that can provide spatial filtering, spatial multiplexing and diversity gain. These advances can be applied to increase link gain, provide interference management, mitigate hostile jammers and facilitate multi-packet reception. In this project ... |
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| Camp Butner UXO Data Inversion and Classification Using Advanced EMI Models |
Nov 2010 |
25 pages |
| Authors:
Fridon Shubitidze; Irma Shamatava; Alex Bijamov; Benjamin Barrowes; Kevin O'Neill; DARTMOUTH COLL HANOVER NH THAYER SCHOOL OF ENGINEERING
|
| Advanced (non-simple-dipole) EMI models' inversion and classification performance is presented for the ESTCP Live-site UXO Discrimination Study at former Camp Butner, NC. The advanced models combine: (1) the joint diagonalization (JD) algorithm for estimating number of potential anomalies from the measured data without inversion, (2) the orthonormalized volume magnetic source (ONVMS) for representing targets' EMI responses and extracting targets' intrinsic parameters feature vector, and (3) the Gaussian Mixture algorithm and ... |
|
| Tents and Shelters |
15 Jul 2010 |
49 pages |
| Authors:
ABERDEEN TEST CENTER MD
|
| This TOP describes procedures for testing rigid wall, soft wall, and hybrid shelters and their accessories, tools and equipment. Tests include Initial Inspection, Safety and Health, Physical Characteristics, Blackout/Infrared Detectability, Roof Load, Durability, Electromagnetic Interference (EMI), Transportability, Environmental, Human Factors Engineering (HFE), Reliability, Availability and Maintainability (RAM), and Final Inspection. |
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| Coordinated Beamforming for MISO Interference Channel: Complexity Analysis and Efficient Algorithms |
2010 |
19 pages |
| Authors:
Ya-Feng Liu; Yu-Hong Dai; Zhi-Quan Luo; MINNESOTA UNIV MINNEAPOLIS DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| In a cellular wireless system, users located at cell edges often suffer significant out-of-cell interference. Assuming each base station is equipped with multiple antennas, we can model this scenario as a multiple-input single-output (MISO) interference channel. In this paper we consider a coordinated beamforming approach whereby multiple base stations jointly optimize their downlink beamforming vectors in order to simultaneously improve the data rates of a given group of cell edge ... |
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| Optimal Jammer Placement to Interdict Wireless Network Services |
01-Jun-2008 |
59 pages |
| Authors:
Arun Shankar; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The demand for wireless networks continues to grow as the need for portable, low-cost telecommunications systems increases around the world. Wireless networks are particularly complex because their topologies can change in response to operational requirements or environmental conditions and also because wireless networks are susceptible to electromagnetic interference. In this thesis, we consider the challenges associated with the operation and jamming of so-called wireless mesh networks. In a wireless mesh ... |
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| Evaluation of Nanocomposites as Lightweight Electronic Enclosures for Satellites' Applications |
JUN 2008 |
98 pages |
| Authors:
Benjamin T. Harder; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The United States military is exploring the use of nanocomposite materials for satellite structural applications. Current composite spacecraft structures are nonconductive and must have expensive shielding materials applied in order to protect the spacecraft from catastrophic damage that can be caused by electromagnetic interference (EMI) and/or electrostatic discharge (ESD) which are characteristics of the space environment. Conductive nanocomposites are being developed for spacecraft structures that will provide ESD and EMI ... |
|
| Compressed Scattering Matrices and Fast Direct Solvers |
18 OCT 2007 |
9 pages |
| Authors:
Vladimir Rokhlin; YALE UNIV NEW HAVEN CT GRANT AND CONTRACT ADMINISTRATION
|
| New direct and analytically precondidoned frequency and time domain integral equation solvers have been developed. First mechanisms for compressing scattering matrices in static and relatively low-frequency environments will be pursued and used in the construction of direct frequency domain integral equation solvers applicable to objects roughly 40 wavelengths in size. Second hierarchical and Calderon preconditioned time-domain integral equation solvers were developed. These solvers remain repidly convergent and stable even when ... |
|
| Electromagnetic Shielding Effectiveness Analysis of Nanoreinforced Polymer Composites |
22 AUG 2007 |
4 pages |
| Authors:
Karen Lozano; Arturo Fuentes; TEXAS UNIV-PAN AMERICAN EDINBURG
|
| The team conducted dielectric analysis of samples to promote a better understanding of the mechanisms involved in changes in dielectric structure of microstructures exposed to varying frequency fields and temperatures. The results were published as S. Yang, R. Benitez, A. Fuentes, and K. Lozano, "Dielectric Analysis of VGCNF Reinforced Polyethylene Composites," Composite Science and Technology, Vol. 67, No. 6, p. 1159 (2007). A journal article also was published relating to ... |
|
| Badlands Bombing Range, South Dakota. Executive Summary |
Jul-2007 |
98 pages |
| Authors:
SCIENCE APPLICATIONS INTERNATIONAL CORP (SAIC) CARY NC
|
| The objective of this demonstration was to compare the discrimination potential of three dynamic surveys among themselves and with static grid data over common targets at the CT-3A Bombing target, Former Badlands Bombing Range, South Dakota. This demonstration leveraged an ordnance and explosive removal action funded by the Corps of Engineers, whose objective was to remove all items larger than a 40mm projectile. We analyzed data from part of the ... |
|
| Assured Reference Technology Research (ARTHR) Project. Delivery Order 0004: Fiber-Optic RF Distribution (FORD) (PREPRINT) |
FEB 2007 |
34 pages |
| Authors:
Daniel McLaughlin; Jeffrey Wells; Timothy Wurthh; Daniel Dresher; NORTHROP GRUMMAN SPACE TECHNOLOGY DAYTON OH
|
| The use of fiber optics is considered herein as a means to distribute Radio Frequency (RF) signals across Printed Circuit Boards (PCB). The use of fiber optics is studied with an emphasis on reducing inter-board Electromagnetic Interference (EMI). High performance RF circuits are especially sensitive to EMI and other Radio Frequency Interference (RFI), resulting in poor circuit to circuit isolation, spurious signals, additional filtering requirements, and increased shielding constraints. Fiber-optic ... |
|
| Conformal Antennas and Integrated Design Procedures |
01 OCT 2006 |
23 pages |
| Authors:
Mauro Bandinelli; Aldo Citriniti; Antonio Guidoni; IDS INGEGNERIA DEI SISTEMI SPA PISA (ITALY)
|
| At present radio communications and radio assistance services aboard aircrafts and helicopters are generally scattered among a number of antennas and sensors across the whole airframe. This policy, which is probably convenient from the point of view of equipment procurement, inevitably causes installation problems on medium/small aircraft, helicopters and UAVs, where only a reduced portion of the airframe surface is usually available for antenna location. Consequently, performance reductions have to ... |
|
| Advanced Filters and Components for Power Applications |
31 AUG 2006 |
135 pages |
| Authors:
Timothy C. Neugebauer; Brandon J. Pierquet; David J. Perreault; MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR ELECTROMAGNETIC AND ELECTRONIC SYSTEMS
|
| The objective of the research presented in this report is to improve the high frequency performance of power filters and components by better compensating the parasitic effects of practical components. A major application for this improvement is in design of low pass filters for power electronics, although some other applications are also explored. In power electronics, the input and output filters are the dominant consideration in limiting electromagnetic interference and ... |
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| Electromagnetic Susceptibility of the Area Denial Weapon System (ADWS) |
AUG 2006 |
|
| Authors:
Valerian A. Kuznetsov; Vinod P. Puri; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA)
|
 | A practical realisation of Electromagnetic Immunity/Compatibility (EMI/EMC) testing of ordnance weapons with electrical initiation according to compliance standards is described. The Area Denial Weapon System (ADWS), which is electrically initiated and electronically controlled, was exposed to electromagnetic interference of a known intensity in an anechioic chamber by injection of induced current, in accordance with the requirements of the USA MIL-STD-461E standard [1] and of the UK's Ordnance Board Pillar Proceeding ... |
|
| Personal Navigation System |
31 OCT 2005 |
51 pages |
| Authors:
Peter Sherman; Steven Holmes; CHARLES STARK DRAPER LAB INC CAMBRIDGE MA
|
| The U.S. Army has a need to provide an affordable navigation system to meet the multi-mission needs of the warfighter. Recent advances in Micro-Electro Mechanical System (MEMS) inertial instruments, Global Positioning System (GPS) receivers, GPS anti-jam technologies and state-of-the-art processing allow the development of a low-cost, GPS/INS-based Personal Navigation System (PNS) that will meet the expected power, size, weight, cost, and performance needs of the Ground Soldier System (formerly Future ... |
|
| Standardized UXO Technology Demonstration Site Open Field Scoring Record Number 668 (NAEVA Geophysics, Inc.) |
SEP 2005 |
60 pages |
| Authors:
Larry Overbay; George Robitaille; ABERDEEN TEST CENTER MD
|
| This scoring record documents the efforts of NAEVA Geophysics Inc. to detect and discriminate inert unexploded ordnance (UXO) utilizing they PG Standardized UXO Technology Demonstration Site Open Field. Scoring Records have been coordinate by Larry Overbay and the Standardized UXO Technology Demonstration Site Scoring Committee. Organizations on the committee include, the U.S. Army Corps of Engineers, the Environmental Security Technology Certification Program, the Strategic Environmental Research and Development Program, the ... |
|
| Details on an AFRL Field Reversed Configuration Plasma Device |
JUN 2005 |
10 pages |
| Authors:
David Kirtley; Daniel L. Brown; Alec D. Gallimore; James Haas; MICHIGAN UNIV ANN ARBOR
|
| A field reversed configuration (FRC) plasma device is being developed at AFRL Edwards. This geometry concept is based off of the coaxial slow source FRC fusion reactor concept developed at the University of Washington by Vlases, et al. A scaling energy model, COTS FEA, and a proof-of-concept experiment have been completed. In addition a complete suite of magnetic diagnostics as well as photometric/optical and internal plasma measurements have been constructed. ... |
|
| Space Dependence - A Critical Vulnerability of the Net-Centric Operational Commander |
17 MAY 2005 |
23 pages |
| Authors:
Matthew E. Grant; NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT
|
| The U.S. military of today is increasingly dependent on highly integrated, complex C2 systems at all levels of command. These complexities have the potential to cause a break down of C2 required by the operational commander. C2 failures become possible if supportive satellite systems are compromised by threats of natural means, rogue states, or non-state actors. Military commanders and systems dependent on satellite information, data, and processes must have alternative ... |
|
| Optical CDMA Systems in High-Speed Telecommunications |
03 MAR 2005 |
43 pages |
| Authors:
Xiaowei Xia; BOULDER NONLINEAR SYSTEMS INC LAFAYETTE CO
|
| Boulder Nonlinear Systems (BNS) and the University of Colorado at Boulder (CU-Boulder) have developed a novel spectral optical code division multiple access (OCDMA) system with bipolar code capability for use in ultra- high-speed communication applications. By using liquid crystal spatial light modulators (SLMs), BNS and CU-Boulder have successfully fabricated and demonstrated a reconfigurable 2-user encoder-decoder system based on a fiber test bed using three arrayed liquid crystal SLMs. A broadband ... |
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| Defeating a Transformed U.S. Military |
14 FEB 2005 |
27 pages |
| Authors:
G. T. Puntney; NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT
|
| Network-centric warfare (NCW), as a theory of war, relies on the premise that ubiquitously networked forces and capabilities will outperform forces that are not. Put another way, all things being equal, the side with the ability to network will generally win. Fundamentally, then, the key enabler of NCW is represented by the functioning of the network that connects sensors, shooters, and decision makers in a system exploiting the synergy of ... |
|
| Shielding Effectiveness of Three Dimensional Gratings using the Periodic FDTD Technique and CPML Absorbing Boundary Condition |
01 JAN 2005 |
5 pages |
| Authors:
J. A. Roden; J. P. Skinner; Steven L. Johns; AEROSPACE CORP CHANTILLY VA
|
| This paper examines the benefits of grating thickness in regards to enhancing EMI attenuation. Analysis is performed using the FDTD technique using periodic boundary conditions along with new formulations of the CPML absorbing boundary. Furthermore, it is demonstrated that a simple waveguide below cutoff approximation provides accurate results for the normal incident plane wave case. |
|
| Proceedings of the Siberian Polarization Workshop (SibPol 2004) (3rd) held 7-9 September 2004 in Surgut, Russia |
01 NOV 2004 |
252 pages |
| Authors:
DELFT UNIV OF TECHNOLOGY (NETHERLANDS)
|
| This document contains the Final Proceedings for the Third Siberian Polarization Workshop (Sibpol 2004), which was held on 7-9 September 2004. The workshop's 34 papers focused on the following topics: (1) polarization of electromagnetic waves at reflection and scattering by complex objects; (2) vector processing of optical signals; (3) polarization characteristics of signals in radar, radio navigation, and communication systems; and (4) polarization radar. A partial listing of titles follows: ... |
|
| Robust Adaptive Control of UCAVs |
30 SEP 2004 |
96 pages |
| Authors:
Yutaka Ikeda; James Ramsey; Eugene Lavretsky; Patrick McCormick; MCDONNELL DOUGLAS CORP ST LOUIS MO MANNED HYPERSONIC SPACE- CAPABLE VEHICLE TECHNOLOGIES DIV
|
| This report describes work performed to investigate adaptive nonlinear control for UCAVs. Specifc control techniques investigated were Internal Model Principle Nonliear Output Regulation for UCAV flight control desing and aero-servo-elastic filter deisgn; and Adaptive Inverse Control for electromagnetic actuator control design for UAVs and advaced missiles. Simulation results show good command following (or reference tracking) characteristic of the Internal Model Priciple Output Regulation technique for designs of flight control and ... |
|
| The Use of Geophysical Data in Studies of the Historical Solar-Terrestrial Environment |
29 SEP 2004 |
12 pages |
| Authors:
M. A. Shea; D. F. Smart; AIR FORCE RESEARCH LAB HANSCOM AFB MA SPACE VEHICLES DIRECTORATE
|
| Recent studies of the solar-terrestrial environment for the past 500 years have necessitated the use of a variety of historical databases: nitrates in ice cores, knowledge of large volcanic eruptions, sunspot numbers, mid-latitude aurora, and geomagnetic records. The nitrate data are being used to identify large solar proton fluence events. The volcanic records help to provide time markers for the ice core. The records of major geomagnetic storms and mid-latitude ... |
|
| MOUT Through the Wall Surveillance Technology Development |
JUN 2004 |
175 pages |
| Authors:
Bob White; TIME DOMAIN CORP HUNTSVILLE AL
|
| The objective of this effort was to develop a handheld impulse radar that would detect the presence of human beings through walls in a military operations and urbanized terrain environment. Particular emphasis was placed on minimizing the weight of the unit so that it conformed to an overall ensemble. The completed unit was then submitted to testing. Areas of testing conducted included system testing, EMI/EMS testing, and temperature and humidity ... |
|
| Positioning, Navigation and Timing: The Foundation of Command and Control |
JUN 2004 |
30 pages |
| Authors:
Raymond Filler; Steven Ganop; Paul Olson; Stanley Sokolowski; William Fischer; UNITED STATES ARMY COMMAND AND CONTROL DIRECTORATE (CERDEC) FORT MONMOUTH NJ
|
| A major tenet of Network Centric Warfare is Information Dominance. The accuracy and availability of position information directly affects operational effectiveness. The traditional role of positioning was for own ship pilotage. That is, can I get from Point A to Point B? The evolving role of positioning is as a shared resource to establish nearperfect Situation Awareness (SA) to enhance Command and Control (C2). C2 systems such as the Army ... |
|
| Asynchronous Techniques for Noise Tolerant Nanoelectronics |
17 MAY 2004 |
14 pages |
| Authors:
Alain J. Martin; Mika Nystroem; SITUS LOGIC PASADENA CA
|
| The objective of this Phase I study was to demonstrate the advantages of asynchronous (clockless) VLST techniques with respect to noise tolerance, to determine the susceptibility of asynchronous QDI logic to noise-induced Single Event Upsets (SEU), and to propose solutions to detect and possible correct SEU errors. A logical model based on production rules was developed in which the effect of an SEU is represented as the random flipping of ... |
|
| Multiple Access Interference Characterization for Direct-Sequence Spread-Spectrum Communications Using Chip Waveform Shaping |
MAR 2004 |
78 pages |
| Authors:
Matthew G. Glen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research characterizes MAI effects on DS/SSMA system performance through simulation in Matlab , and explores the impact of multiple access code selection, chip waveform shaping, and multiple access code length on BER for both synchronous and asynchronous multiple access networks. In addition, the simulated DS/SSMA model permits rapid research into the effects of additional factors on BER. Prior to experimental testing, model validation is conducted through single user trials ... |
|
| An Analysis of Electromagnetic Interference (EMI) of Ultra Wideband(UWB) and IEEE 802.11A Wireless Local Area Network (WLAN) Employing Orthogonal Frequency Division Multiplexing (OFDM) |
MAR 2004 |
158 pages |
| Authors:
Juan Lopez Jr.; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Military communications require the rapid deployment of mobile, high- bandwidth systems. These systems must provide anytime, anywhere capabilities with minimal interference to existing military, private, and commercial communications. Ultra Wideband (UWB) technology is being advanced as the next generation radio technology and has the potential to revolutionize indoor wireless communications. The ability of UWB to mitigate multipath fading, provide high-throughput data rates (e.g., greater than 100 Mbps), provide excellent signal ... |
|
| A Simple Transverse Motion Detector for Railguns |
JAN 2004 |
5 pages |
| Authors:
S. J. Levinson; Stephan Bless; TEXAS UNIV AT AUSTIN INST FOR ADVANCED TECHNOLOGY
|
| This paper addresses the accurate measurement of the transverse armature-sabot motion during a railgun shot. One way to make such measurements is to use three orthogonally arranged piezorestive accelerometers made by ENDEVCO. Model 7270A-200k is a tiny unit rated for measurements up to 200 kGee. Each unit costs about $ 1,500 and has a specified 4-kGee uncertainty due to "non-linearity and hysteresis" and a 5 percent "transverse sensitivity." There are ... |
|
| Information Assurance: Trends in Vulnerabilities, Threats, and Technologies |
2004 |
147 pages |
| Authors:
Jacques S. Gansler; Hans Binnendijk; NATIONAL DEFENSE UNIV WASHINGTON DC CENTER FOR TECHNOLOGY AND NATIONAL SECURITY POLICY
|
| One of the missions of the Center for Technology and National Security Policy at National Defense University is to study the transformation of America's military and to explore the consequences of the information revolution. To further this mission, National Defense University, in collaboration with The Center for Public Policy and Private Enterprise of the University of Maryland's School of Public Affairs, brought together leaders in the fields of military and ... |
|
| Applied Computational Electromagnetics Society Journal. Volume 18, Number 4, November 2003. Special Issue on ACES 2003 Conference. Part 1 |
NOV 2003 |
123 pages |
| Authors:
Atef Z. Elsherbeni; APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY UNIVERSITY MS
|
| The Applied Computational Electromagnetics Society (ACES) Journal hereinafter known as the ACES Journal is devoted to the exchange of information in computational electromagnetics, to the advancement of the state-of-the art, and the promotion of related technical activities. A primary objective of the information exchange is the elimination of the need to "reinvent the wheel" to solve a previously-solved computational problem in electrical engineering, physics, or related fields of study. The ... |
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Reports by Keyword(s)
ELECTROMAGNETIC INTERFERENCE
