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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Oct. 1995

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Displaying Results 1 - 15 of 15
  • Design of dynamic dissipative compensators for flexible space structures

    Publication Year: 1995, Page(s):1314 - 1324
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1338 KB)

    Control system design is considered for attitude control and vibration suppression of flexible space structures. The problem addressed is that of controlling both the zero-frequency rigid-body modes and the elastic modes. Model-based compensators, which employ observers tuned to the plant parameters, are first investigated. Such compensators are shown to generally exhibit high sensitivity to the k... View full abstract»

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  • Sensor/actuator failure detection in the Vista F-16 by multiple model adaptive estimation

    Publication Year: 1995, Page(s):1218 - 1229
    Cited by:  Papers (104)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2701 KB)

    Multiple model adaptive estimation (MMAE) is applied to the Variable-In-flight Stability Test Aircraft (VISTA) F-16 flight control system at a low dynamic pressure flight condition (0.4 M at 20000 ft). Single actuator and sensor failures are addressed first, followed by dual actuator and sensor failures. The system is evaluated for complete or "hard" failures, partial or, "soft" failures, and comb... View full abstract»

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  • Improved sequential MUSIC

    Publication Year: 1995, Page(s):1230 - 1239
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1111 KB)

    MUSIC (multiple signal classification) is one of the most frequently considered methods for source location using sensor arrays. Among the location methods based on one-dimensional search, MUSIC has excellent performance. In fact, no other one-dimensional method that may outperform MUSIC (in large samples) was known to exist. Our goal here is to introduce such a method, called improved sequential ... View full abstract»

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  • Performance enhancement of a multiple model adaptive estimator

    Publication Year: 1995, Page(s):1240 - 1254
    Cited by:  Papers (53)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (9522 KB)

    We describe performance improvement techniques for a multiple model adaptive estimator (MMAE) used to detect and identify control surface and sensor failures on an unmanned flight vehicle. Initially failure identification was accomplished within 4 s of onset, but by removing the "β dominance" effects, bounding the hypothesis conditional probabilities, retuning the Kalman filters, increasing t... View full abstract»

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  • Filtering of moving targets using SBIR sequential frames

    Publication Year: 1995, Page(s):1255 - 1267
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2231 KB)

    In this paper three-dimensional (3-D) finite-impulse response (FIR) filters are proposed for moving target detection and tracking from multiframe space-based infrared (SBIR) data. An optimal, in the l p sense, 3-D FIR filter design technique is proposed which is suitable for the above application. This technique is the first 3-D FIR design of its kind presented in the open literature. D... View full abstract»

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  • Adaptive image segmentation using genetic and hybrid search methods

    Publication Year: 1995, Page(s):1268 - 1291
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (13255 KB)

    This paper describes an adaptive approach for the important image processing problem of image segmentation that relies on learning from experience to adapt and improve the segmentation performance. The adaptive image segmentation system incorporates a feedback loop consisting of a machine learning subsystem, an image segmentation algorithm, and an evaluation component which determines segmentation... View full abstract»

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  • Spatio-temporal pattern recognition using hidden Markov models

    Publication Year: 1995, Page(s):1292 - 1300
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3873 KB)

    A spatio-temporal method for identifying objects contained in an image sequence is presented. The Hidden Markov Model (HMM) technique is used as the classification algorithm, making classification decisions based on a spatio-temporal sequence of observed object features. A five class problem is considered. Classification accuracies of 100% and 99.7%, are obtained for sequences of images generated ... View full abstract»

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  • A novel resonant converter topology for DC-to-DC power supply

    Publication Year: 1995, Page(s):1301 - 1313
    Cited by:  Papers (9)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3188 KB)

    A class-E DC-to-DC converter with half-wave controlled current rectifier is proposed. Its output voltage is controlled by the conduction angle of the rectifier switch at constant switching frequency. Zero voltage switching for all the switches can be maintained from full load to no load. Its steady state characteristics are analyzed and the effects of the circuit parameters are studied. Some exten... View full abstract»

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  • Dynamic dissipative compensators for multibody flexible space structures

    Publication Year: 1995, Page(s):1325 - 1330
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (527 KB)

    The stability characteristics of dynamic dissipative compensators are investigated for multibody flexible space structures having nonlinear dynamics. The problem addressed is that of proving asymptotic stability of dynamic dissipative compensators. The stability proof uses the Lyapunov approach and exploits the inherent passivity of such systems. For such systems these compensators are shown to be... View full abstract»

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  • Neural controllers for systems with unknown dynamics

    Publication Year: 1995, Page(s):1331 - 1340
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1684 KB)

    This study presents a methodology for specifying a neural controller for a system about which no a priori model information is available. The neural design presumes that a finite duration input/output (I/O) histogram on the system is available. The design procedure extracts from the histogram sufficient information to specify the neural feedback controller. The resultant controller will drive the ... View full abstract»

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  • Neural control of smart electromagnetic structures [patch antennas]

    Publication Year: 1995, Page(s):1341 - 1347
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1625 KB)

    Smart electromagnetic structures (SEMS) are capable of interacting with the surrounding electromagnetic field and responding to it. A system is "smart" when it integrates sensing, processing, and control elements (e.g. antennas, neural networks, diodes) in an autonomous manner. A SEMS capable of tuning frequency autonomously is described. Data are presented showing that the system can extend the u... View full abstract»

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  • High resolution imaging of objects at Ka band

    Publication Year: 1995, Page(s):1348 - 1353
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1473 KB)

    A coherent wideband millimeter wave (mmW) imaging radar which operates in two different imaging modes is briefly described. The principles of two-dimensional (2-D) high resolution imaging are introduced. The image reconstruction algorithm together with image enhancement techniques are discussed. Some experiments imaging on both scaled aircraft model and full-size large scale vehicle are presented.... View full abstract»

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  • 1995 Pioneer Award [Robert E. Cowdery & William A. Skillman]

    Publication Year: 1995, Page(s):1355 - 1356
    Request permission for commercial reuse | PDF file iconPDF (333 KB)
    Freely Available from IEEE
  • Development of the airborne warning and control system (AWACS) radar

    Publication Year: 1995, Page(s):1357 - 1365
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1314 KB)

    In 1962 both the Tactical Air Command (TAC) and the Air Defense Command (ADC) defined new systems for airborne surveillance. These were similar in basic concept but considerably different in their specific target requirements. Because of the Continental U.S. (CONUS) defense requirements for long-range target detection and tracking of large numbers of targets, the ADC version was the more demanding... View full abstract»

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  • Previous Pioneer Awards

    Publication Year: 1995, Page(s):1366 - 1367
    Request permission for commercial reuse | PDF file iconPDF (154 KB)
    Freely Available from IEEE

Aims & Scope

IEEE Transactions on Aerospace and Electronic Systems focuses on the organization, design, development, integration, and operation of complex systems for space, air, ocean, or ground environment.  These systems include, but are not limited to, navigation, avionics, spacecraft, aerospace power, radar, sonar, telemetry, defense, transportation, automated testing, and command and control. 

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Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory