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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Oct. 2000

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Displaying Results 1 - 25 of 43
  • Comment on "Steady-state tracking with LFM waveforms"

    Publication Year: 2000, Page(s):1406 - 1407
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (71 KB)

    The purpose of this note is to point out that, if appropriate normalizations are applied, the numerical data presented by W. Wong & W.D. Blair [ibid. vol.36, pp.701-709 (2000)] has much broader applicability than is implied there. View full abstract»

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  • Author index

    Publication Year: 2000, Page(s):1 - 6
    Request permission for commercial reuse | PDF file iconPDF (565 KB)
    Freely Available from IEEE
  • Subject index

    Publication Year: 2000, Page(s):6 - 26
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    Freely Available from IEEE
  • Recursive control design for low frequency disturbance accommodation [and application to satellite attitude control]

    Publication Year: 2000, Page(s):1330 - 1335
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The problem of state estimation and regulation in the presence of uncertainty and low frequency disturbance is dealt with. A controller design method, based on input-output histories as well as a nominal model to attenuate the effects of the uncertainty and the disturbance is proposed. The state vector is predicted recursively using a past state vector, and a past input vector. By this property, t... View full abstract»

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  • Starter/generator employing resonant-converter-fed induction machine. II. Hardware prototype

    Publication Year: 2000, Page(s):1319 - 1329
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    The feasibility of operation of a new procedure to start a jet engine (JE) and to generate power by means of a single induction machine (IM) directly coupled to the turbine has been shown by means of a hardware prototype. An introduction, background, operation principle of this type of a system and software simulation portion was presented in Part I. Both in software simulation and in the experime... View full abstract»

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  • Starter/generator employing resonant-converter-fed induction machine. I. Analysis

    Publication Year: 2000, Page(s):1309 - 1328
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    A new procedure to start a jet engine (JE) and to generate power by means of a single induction machine (IM) directly coupled to the turbine is presented. The JE is brought to an initial speed by the motoring operation of the IM. Later, the IM is taken into generating mode and the turbine is applied to its excitation. The turbine catches up and starts to drive the induction generator (IG). The gen... View full abstract»

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  • Matrix method synthesis of transmitting antenna for wireless power transmission

    Publication Year: 2000, Page(s):1142 - 1148
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The synthesis of the radiating structure of wireless power transmission (WPT) systems has some unique aspects. An important attribute is the efficiency of coupling the radiated energy into the receiving aperture. There are possibilities of improving the WPT by variations of the wave field distribution on the aperture and its configuration too. The matrix method of synthesis of the aforesaid struct... View full abstract»

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  • Divisible load scheduling on single-level tree networks with buffer constraints

    Publication Year: 2000, Page(s):1298 - 1308
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Scheduling a divisible load on a heterogeneous single-level tree network with processors having finite-size buffers is addressed. We first present the closed-form solutions for the case when the available buffer size at each site is assumed to be infinite. Then we analyze the case when these buffer sizes are of finite size. For the first time in the domain of DLT (divisible load theory) literature... View full abstract»

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  • PCM/FM aeronautical telemetry in frequency selective multipath interference

    Publication Year: 2000, Page(s):1090 - 1098
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The performance of PCM/FM using a delay-line detector in multipath interference is analyzed. In aeronautical telemetry applications, the multipath interference causes a in the signal spectrum which is web modeled by a channel composed of a line-of-sight signal and a strong specular reflection with magnitude Γ and excess delay less than a bit time. Analysis shows that the bit error probabilit... View full abstract»

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  • Performance of split-window multipass-mean noise spectral estimators

    Publication Year: 2000, Page(s):1360 - 1370
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    Spectrogram background normalization for narrowband passive acoustic detection systems has a long history, and the split-window three-pass mean noise spectral estimator (S3PM NSE) is currently a standard in this regard. As yet, however, there is no analytical design methodology for choosing the window parameters and shearing thresholds for the S3PM NSE. That deficiency is remedied here by deriving... View full abstract»

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  • Robust sliding-mode control for the uncertain MIMO aircraft model F-18

    Publication Year: 2000, Page(s):1127 - 1141
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1068 KB)

    Robust flight control laws based on variable structure control (VSC) theory and Lyapunov V-function method are designed for a simplified aircraft model F-18. A min-max control (MMC) and VSC laws are derived, for multi-input multi-output (MIMO) systems with plant uncertainties and input disturbance. Two types of robust feedback controllers MMC and VSC for uncertain MIMO systems are considered. For ... View full abstract»

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  • Parametric models for helicopter identification using ANN

    Publication Year: 2000, Page(s):1242 - 1252
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (956 KB)

    An artificial neural network (ANN) based helicopter identification system is proposed. The feature vectors are based on both the tonal and the broadband spectrum of the helicopter signal, ANN pattern classifiers are trained using various parametric spectral representation techniques. Specifically, linear prediction, reflection coefficients, cepstrum, and line spectral frequencies (LSF) are compare... View full abstract»

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  • Performance of decentralized L-CFAR detection in inhomogeneous background

    Publication Year: 2000, Page(s):1414 - 1423
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    The problem of decentralized constant false alarm rate (CFAR) detection, with L-CFAR remote sensors, is considered. Following a previous paper, concerning the design and the analysis of such detection structure in homogeneous environment, we now assume that a detector, designed to operate with homogeneous background, is affected instead by clutter edges and secondary targets entering the local sen... View full abstract»

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  • Robot-aided remote inspection experiment on STS-85

    Publication Year: 2000, Page(s):1290 - 1297
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1044 KB)

    The results are presented for the robot-aided spacecraft inspection experiments using a flaw detection algorithm called multi-images overcast (MIO), which were conducted as an extension of NASDA's Manipulator Flight Demonstration mission installed on space shuttle mission STS-85. These experiments are the first step towards research and development of the Orbital Maintenance System to support spac... View full abstract»

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  • Three-dimensional trajectory estimation from image position and velocity

    Publication Year: 2000, Page(s):1075 - 1089
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (868 KB)

    A recursive algorithm for estimating the three-dimensional trajectory and structure of a moving rigid object in an image sequence has been previously developed by Broida, Chandrashekhar, and Chellappa [1990]. Since then, steady advances have occurred in the calculation of optical flow. This work improves 3D motion trajectory and structure estimation by incorporating optical flow into the estimatio... View full abstract»

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  • Adaptive fuzzy mixed H2/H attitude control of spacecraft

    Publication Year: 2000, Page(s):1343 - 1359
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1140 KB)

    This paper presents an adaptive fuzzy mixed H2/H∞ attitude control of nonlinear spacecraft systems with unknown or uncertain inertia matrix and external disturbances. Using an adaptive fuzzy approximation method, an uncertain nonlinear model is estimated. Then, by a mixed H2 and H∞ attitude control design, the effect of external disturbance a... View full abstract»

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  • Fast converging adaptive processor or a structured covariance matrix

    Publication Year: 2000, Page(s):1115 - 1126
    Cited by:  Papers (85)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    The use of adaptive linear techniques to solve signal processing problems is needed particularly when the interference environment external to the signal processor (such as for a radar or communication system) is not known a priori. Due to this lack of knowledge of an external environment, adaptive techniques require a certain amount of data to cancel the external interference. The number of stati... View full abstract»

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  • Feedback median filter for robust preprocessing of glint noise

    Publication Year: 2000, Page(s):1026 - 1035
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    Glint noise may arise in a target tracking system. The non-Gaussian behavior of glint noise can severely degrade the tracking performance. Measurement preprocessing at the front-end of the tracker is an effective method to reduce glint noise. The preprocessor proposed by Hewer, Martin, and Zeh (1987), which used the computationally intensive M-estimator, may not be suitable for practical implement... View full abstract»

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  • Sensorless synchronous reluctance drive with standstill starting

    Publication Year: 2000, Page(s):1232 - 1241
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    This paper presents a novel sensorless synchronous reluctance drive system. Based on the dynamic model of the synchronous reluctance motor (SRM), a new rotor position estimator is proposed. This estimator is only related to the rate change of the stator currents. It is not related to the parameters, speed, voltage, and external load of the motor. As a result, the estimator is simple and robust. Ba... View full abstract»

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  • Evaluating a linear predictive algorithm for bandwidth conservation

    Publication Year: 2000, Page(s):1407 - 1414
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    A predictive algorithm for bandwidth conservation and enhanced situation awareness is described and evaluated. In such a system, knowledge of position and intent of the participants involved in the operation must be readily available, and distributed to other units by communications link. This objective can be achieved by predicting position tracks of each unit ahead in time, based on past kinemat... View full abstract»

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  • Stability analysis of digital linear flight controllers subject to electromagnetic disturbances

    Publication Year: 2000, Page(s):1204 - 1218
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    High intensity electromagnetic radiation has been demonstrated to be a source of computer upsets in commercially available digital flight control systems. Such upsets can degrade the quality of the control signal ranging from a perturbation error over a few sample periods to a permanent error mode or computer failure. Under these conditions, the primary concern of the control engineer is to insure... View full abstract»

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  • On detection using filter banks and higher order statistics

    Publication Year: 2000, Page(s):1179 - 1189
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    We suggest a method, based on the use of filter bank and higher order statistics (cumulants), for detection of transient signals. The method first uses a bandpass filter bank, which separates the spectrum of the observed signal into narrow frequency bands. Each subfilter of the filter bank is then followed by a cumulant estimator, and thereby suppressing colored noise. By selecting those subfilter... View full abstract»

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  • Performance of 10- and 20-target MSE classifiers

    Publication Year: 2000, Page(s):1279 - 1289
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1608 KB)

    MIT Lincoln Laboratory is responsible for developing the ATR (automatic target recognition) system for the DARPA-sponsored SAIP program; the baseline ATR system recognizes 10 GOB (ground order of battle) targets; the enhanced version of SAIP requires the ATR system to recognize 20 GOB targets. This paper presents ATR performance results for 10- and 20-target mean square error (MSE) classifiers usi... View full abstract»

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  • Analytic models and postprocessing techniques for UWB SAR

    Publication Year: 2000, Page(s):1058 - 1074
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1396 KB)

    The latest generation of fully polarimetric, ultra wideband (UWB), wide angle, low frequency, foliage and ground-penetrating synthetic aperture radars (SARs) record huge amounts of data that must be processed to focus high quality images. At the same time only a few small subimages contain important information. We investigate the relationship between the focused image and the reflectivity profile... View full abstract»

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  • Optimality for data fusion of detectors using Voronoi cells

    Publication Year: 2000, Page(s):1396 - 1400
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The problem of optimal signal classification with distributed sensors and restricted communication channels is considered. The classifier is to decide if a signal is in one of several possible classes after being observed through a suite of sensors, each sensor giving rise to a soft classification. The local classifiers are assumed to be based on a Voronoi decomposition of the associated sensor ou... View full abstract»

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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. 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory