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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Oct. 1996

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Displaying Results 1 - 25 of 33
  • 1996 Index IEEE Transactions on Aerospace and Electronic Systems Vol. 32

    Publication Year: 1996
    Request permission for commercial reuse | PDF file iconPDF (3306 KB)
    Freely Available from IEEE
  • Current-mode control for multiple-output converters

    Publication Year: 1996, Page(s):1412 - 1420
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    A small-signal model for multiple-output forward converter with current-mode control is derived. The model can accurately predict the small-signal characteristics for current-mode control. It is observed that the power stage pole-zero relative positions, which are critical to the compensator design, are not affected by introducing current-mode control View full abstract»

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  • Improved COSPAS-SARSAT locating with geostationary satellite data

    Publication Year: 1996, Page(s):1405 - 1411
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    The COSPAS-SARSAT system locates distress beacons via Doppler analysis of beacon transmissions as observed by low Earth orbiting (LEO) satellites. By contrast, the 406 MHz search and rescue transponder on the geostationary satellites can measure only the transmitted frequency of the beacon, which is not currently being used in location determination. This report shows that a combined data approach... View full abstract»

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  • Automatic recognition of ISAR ship images

    Publication Year: 1996, Page(s):1392 - 1404
    Cited by:  Papers (91)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1356 KB)

    Inverse synthetic aperture radar (ISAR) produces images of ships at sea which human operators can be trained to recognize. Because ISAR uses the ship's own varying angular motions (roll, pitch, and yaw) for cross-range resolution, the viewing aspect and cross-range scale factor are continually changing on time scales of a few seconds. This and other characteristics of ISAR imaging make the problem... View full abstract»

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  • Observability in passive target motion analysis

    Publication Year: 1996, Page(s):1290 - 1300
    Cited by:  Papers (65)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    The nature of observability of nonlinear systems encountered in passive target motion analysis (TMA) is carefully examined. The approach proposed here is based upon a well-chosen criterion which allows us to answer the major observability questions View full abstract»

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  • Stochastic stability theory for systems containing interval matrices

    Publication Year: 1996, Page(s):1385 - 1391
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    Known conditions for the stability of stochastic, linear time-varying (LTV) dynamical systems based on Liapunov theory are applied to LTV dynamical systems containing interval matrices; both discrete and continuous time processes are considered. These conditions are sufficient for stability with probability 1 (wp1) and, in the case of discrete time, also necessary for stability in m.s. They lead t... View full abstract»

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  • Data quantization effects in CFAR signal detection

    Publication Year: 1996, Page(s):1277 - 1289
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1012 KB)

    In this paper, we investigate data quantization effects in constant false alarm rate (CFAR) signal detection. Exponential distribution for the input data and uniform quantization are assumed for the CFAR detector analysis. Such assumptions are valid in the case of radar for a Swerling I target in Gaussian clutter plus noise and a receiver with analog square-law detection followed by analog-to-digi... View full abstract»

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  • Chinese National Cumulative Index on Radar Systems: 1988-1994

    Publication Year: 1996, Page(s):1523 - 1526
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4036 KB)

    This “second edition” is a continuation of the series of National Cumulative Indexes on Radar Systems inaugurated in 1988. These National series augment the periodic International Cumulative Indexes on Radar Systems which are prepared by members of the IEEE AESS Radar Systems Panel. Information on both series is contained in IEEE AES Transactions vol. 27, no. 3 p. 581 (May 1991) View full abstract»

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  • Low observable target motion analysis using amplitude information

    Publication Year: 1996, Page(s):1367 - 1384
    Cited by:  Papers (101)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1244 KB)

    In conventional passive and active sonar system, target amplitude information (AI) at the output of the signal processor is used only to declare detections and provide measurements. We show that the AI can be used in passive sonar system, with or without frequency measurements, in the estimation process itself to enhance the performance in the presence of clutter where the target-originated measur... View full abstract»

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  • Model reduction and control of ASTREX using stable fractions

    Publication Year: 1996, Page(s):1268 - 1276
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    The Advanced Space Structures Technology Research Experiments (ASTREX) is a precision structure situated at the Phillips Laboratory Edwards Air Force Base, CA. The structure is a test bed to develop, test, and validate control strategies for large-angle three-axis slewing manoeuvres and vibration suppression. The ASTREX facility consists of the test article (with primary, secondary, and tertiary s... View full abstract»

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  • Analytical solution of 3D true proportional navigation

    Publication Year: 1996, Page(s):1509 - 1522
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    The commanded acceleration applying in the direction normal to the line of sight (LOS) between the interceptor and its target is called true proportional navigation (TPN). The main goal of this work is to derive the complete analytical solutions of three-dimensional (3D) TPN for nonmaneuvering and maneuvering targets. Three coupled nonlinear second-order state equations describing the relative mot... View full abstract»

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  • Strapdown INS error model for multiposition alignment

    Publication Year: 1996, Page(s):1362 - 1366
    Cited by:  Papers (40)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The relationship between quaternion errors and tilt angles from true navigation frame to analytic platform frame is newly derived for strapdown inertial navigation system (SDINS). Using the relationship it is shown that the quaternion error model for attitude and velocity is equivalent to the conventional perturbation error model. Based upon the equivalency, the quaternion errors during a multipos... View full abstract»

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  • OS-CFAR thresholding in decentralized radar systems

    Publication Year: 1996, Page(s):1257 - 1267
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    In a decentralized detection scheme, several sensors perform a binary (hard) decision and send the resulting data to a fusion center for the final decision. If each local decision has a constant false alarm rate (CFAR), the final decision is ensured to be CFAR. We consider the case that each local decision is a threshold decision, and the threshold is proportional, through a suitable multiplier, t... View full abstract»

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  • Current ripple bounds of interleaved power converters

    Publication Year: 1996, Page(s):1505 - 1508
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    We extend the main claims for more general waveforms. Specifically, we show that for any power converter module, if its input/output current ripple waveform is of full-sinusoidal-type or half-sinusoidal-type with peak-to-peak amplitude A(ΔI0), then the amplitude of the input/output current ripple of N (⩾1) parallelly interleaved such modules (with equal phase shift 2π/N) is... View full abstract»

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  • Improved tracking of maneuvering targets: The use of turn-rate distributions for acceleration modeling

    Publication Year: 1996, Page(s):1355 - 1361
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Tactically maneuvering targets are difficult to track since acceleration cannot be observed directly and the accelerations are induced by human control or an autonomous guidance system therefore they are not subject to deterministic models. A common tracking system is the two-state Kalman filter with a Singer maneuver model where the second-order statistics of acceleration is the same as a first-o... View full abstract»

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  • Pure proportional navigation against time-varying target manoeuvres

    Publication Year: 1996, Page(s):1336 - 1347
    Cited by:  Papers (48)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    Capturability of the pure proportional navigation (PPN) guidance law against a target executing bounded piecewise continuous time-varying manoeuvres is investigated. A qualitative analysis is carried out to obtain a set of sufficient conditions for capture defined on the engagement parameters and initial conditions. These conditions are significantly less restrictive than the ones obtained previou... View full abstract»

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  • Nonlinear clutter cancellation and detection using a memory-based predictor

    Publication Year: 1996, Page(s):1249 - 1256
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    In this paper, a nonlinear prediction (NLP) method is proposed as an alternative to the conventional linear prediction (LP) method for clutter cancellation. Because of the nonlinearity and non-Gaussianity of a clutter process, a nonlinear predictor is therefore needed to suppress clutter optimally. A memory-based predictor which uses a table look-up strategy to perform NLP is used in this work. Th... View full abstract»

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  • A fast initial alignment method for strapdown inertial navigation system on stationary base

    Publication Year: 1996, Page(s):1501 - 1504
    Cited by:  Papers (61)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    In this paper a strapdown inertial navigation system (SINS) error model is introduced, and the observability of the SINS error model is analyzed. Then, on the basis of this SINS error model and the analysis of computer simulation results, a fast estimation method of the azimuth error ΦD is proposed for the initial alignment of SINS on stationary base. Consequently, the time of initi... View full abstract»

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  • Monitoring the thermal condition of permanent-magnet synchronous motors

    Publication Year: 1996, Page(s):1421 - 1429
    Cited by:  Papers (56)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    This paper describes a novel approach to monitoring the condition of small permanent-magnet synchronous motors (PMSM) operating under thermal stress. The approach begins with the estimation of temperature-dependent motor parameters from measurements of line voltages and currents. The parameters are then used to derive estimates of motor temperatures. Next, the electrically estimated temperatures a... View full abstract»

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  • Estimation of singularities for intercept point forecasting

    Publication Year: 1996, Page(s):1301 - 1310
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    In this paper, a recursive approach (an algorithm for estimation of singularity (AES)) is proposed to forecast the intercept point of a target and the pursuing interceptor recognized as the estimated singularity of a nodal cubic curve fitted to the data. The data comprises direction of arrival (DOA) estimates of both target and interceptor obtained at regular intervals of time using the maximum li... View full abstract»

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  • A digital quadrature demodulation system

    Publication Year: 1996, Page(s):1218 - 1227
    Cited by:  Papers (18)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Existing digital quadrature demodulation techniques sample the input at either 2B Hz or 4B Hz, select the even samples as the in-phase (I), and interpolate the odd samples to give the quadrature (Q), output. The signal bandwidth is B. We propose a demodulation system to produce I and Q samples at arbitrary sampling rate greater than 2B Hz. The system eliminates the IF downconversion step with a sp... View full abstract»

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  • Passive target tracking using maximum likelihood estimation

    Publication Year: 1996, Page(s):1348 - 1354
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    Estimation of target trajectory from passive sonar bearings and frequency measurements in the presence of multivariate normally distributed noise, with unknown inhomogeneous general covariance, is modeled as a nonlinear multiresponse parameter estimation problem. It is shown that maximum likelihood estimation in this case is identical to optimizing a determinant criterion which has a concise form ... View full abstract»

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  • An alternative closed-form solution to the GPS pseudo-range equations

    Publication Year: 1996, Page(s):1430 - 1439
    Cited by:  Papers (25)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (988 KB)

    In the four satellite Global Positioning System (GPS) problem, the system of pseudo-range equations is shown to be equivalent to a system of two linear equations together with a range difference and pseudo-range equation. The formulation represents the user's position as the intersection of two planes and a hyperbola branch of revolution. The formulation is three-dimensional and includes almost al... View full abstract»

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  • Maneuvering target tracking with colored noise

    Publication Year: 1996, Page(s):1311 - 1320
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    It is known that colored noise may degrade the performance of a tracking algorithm. A common remedy is to model colored noise as an autoregressive (AR) process and apply the measurement difference method. One problem with the approach is that the AR parameters are usually unknown. In this work, we propose a new method to adaptively estimate the AR parameters. It is shown that this method is simple... View full abstract»

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  • Synthesis and analysis of inductor-isolated switched-mode converter

    Publication Year: 1996, Page(s):1228 - 1238
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1120 KB)

    A procedure is developed for the synthesis and analysis of complete classes of inductor-isolated PWM (pulse width-modulated) converters. The procedure is useful in the identification of converters in which the isolation inductors can be integrated with the rest of the inductors on the same magnetic structures. The information obtained from the procedure is useful in the selection of the converter ... 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