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IEEE Transactions on Aerospace and Electronic Systems

Issue 5 • Date Sept. 1985

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Displaying Results 1 - 25 of 27
  • Table of contents

    Publication Year: 1985, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1985, Page(s): c2
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  • From the Editors

    Publication Year: 1985, Page(s): 593
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  • Stochastic Dynamic System Suboptimal Control with Uncertain Parameters

    Publication Year: 1985, Page(s):594 - 600
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1484 KB)

    The control of a linear system with random coefficients is studied here. The cost function is of a quadratic form and the random coefficients are assumed to be partially observable by the controller. By means of the stochastic Bellman equation, the optimal control of stochastic dynamic models with partially observable coefficients is derived. The optimal control is shown to be a linear function of... View full abstract»

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  • Transient Nonstationary Behavior of a Delay Line Discriminator

    Publication Year: 1985, Page(s):601 - 609
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2928 KB)

    The development of numerical methods for studying the transient nonstationary behavior of a delay line discriminator is presented. Expressions are developed for the mean and the variance of the output noise process. For the cases where the output is stationary, power density spectra are found. View full abstract»

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  • Improved Carrier Tracking by Smoothing Estimators

    Publication Year: 1985, Page(s):610 - 618
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1425 KB)

    Smoothing as a way to improve the carrier phase estimation is proposed and analyzed. The performance of first-and second-order Kalman optimum smoothers are investigated. This perfomance is evaluated in terms of steady-state covariance error computation, dynamic tracking, and noise response. It is shown that with practical amounts of memory, a second-order smoother can have a position error due to ... View full abstract»

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  • Surge and Noise Generation in a Forward DC-to-DC Converter

    Publication Year: 1985, Page(s):619 - 630
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2210 KB)

    Switching surge and noise voltages are analyzed under the common-mode condition in a forward dc-to-dc converter. The analysis is performed by partitioning the switching time into several states and introducing the high-frequency equivalent circuits. The equivalent circuits include not only inductive and capacitive parameters, but also the parameters related to the switching speed of the transistor... View full abstract»

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  • Nonlinear Adaptive Control of a Synchronous Machine

    Publication Year: 1985, Page(s):631 - 643
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1863 KB)

    A nonlinear adaptive controller for a load-commutated brushless dc machine that allows the machine to develop high torque over a wide range of operating conditions, while satisfying voltage and current constraints on both stator and field circuits, is presented. The approach taken is fundamentally different from past work in that a nonlinear control is formulated from the steady-state model of the... View full abstract»

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  • Nickel-Cadmium Batteries as Capacitive Filters for Pulsed Loads

    Publication Year: 1985, Page(s):644 - 653
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2928 KB)

    This investigation consisted of several tests of specially fabricated nickel-cadmium batteries having circular disk-type electrodes. These batteries were evaluated as filter elements between a constant current power supply and a 5 Hz pulsed load demanding approximately twice the power supply current during the load on a portion of the cycle. Short tests lasting 104 cycles were conducted at up to a... View full abstract»

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  • Interference Canceler Array with Reference Generating Loop

    Publication Year: 1985, Page(s):654 - 662
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1806 KB)

    Adaptive arrays utilizing an internally generated reference signal to drive least mean square (LMS) weight determining loops have experienced difficulty arising from phase shifts induced by the reference generating circuits. The phenomenon observed is that the expected value of the weights oscillate in the steady state modulating the incoming signal. A scheme is reported which avoids this problem.... View full abstract»

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  • Multidimensional Algebraic Polynomial Approximation

    Publication Year: 1985, Page(s):663 - 669
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1012 KB)

    A computational algorithm to approximate an n-dimensional function of the form F(x,y,z, ...) by an algebraic polynomial in the least square (LSQ) sense is described. The basis of this algorithm is that the n-dimensional function can be approximated by a set of polynomials in each one of the independent variables x,y,z, ... . This technique is illustrated by deriving the algebraic polynomial approx... View full abstract»

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  • Error Covariance Analysis of a Karhunen-Loeve Random Field Estimator

    Publication Year: 1985, Page(s):670 - 687
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2474 KB)

    An error covariance analysis of a two-dimensional Karhunen-Loeve random field estimator (KLE) for gridded gravity data is presented without actually using the data. Attention is focused particularly on the north-south deflection component of the disturbance vector so that the rms value of its residual error may not exceed 3 percent of the signal rms for grid spacing of not less than 5 nm, when sig... View full abstract»

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  • Batch Recursive Data Compression Schemes for INS Error Estimation

    Publication Year: 1985, Page(s):688 - 697
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1788 KB)

    Application of new data compression schemes to aided inertial navigation systems is presented. The need for data compression is motivated by the fact that the external aiding system generates frequent but inaccurate position measurements, which have to be processed by a processor whose computation capability is limited. Two new data compression techniques are presented and their efficiency is demo... View full abstract»

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  • Torque, Speed, and Position Control of Induction Machines Using the DQ Model

    Publication Year: 1985, Page(s):698 - 710
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2008 KB)

    New nonlinear controllers for torque, speed, and shaft position of inverter fed induction machines are developed. The controllers are novel because they are based on the full DQ model of the machine and hence account for the nonlinear characteristics of induction machines. In addition, a multivariable control algorithm based on the DQ model is considered. Simulation results for the single input co... View full abstract»

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  • The Proper Computation of the Matrix Pseudoinverse and its Impact in MVRO Filtering

    Publication Year: 1985, Page(s):711 - 724
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2996 KB)

    There have been two new algorithms of fairly recent origin offered for the calculation of the matrix pseudoinverse. Unfortunately, nonpathological counterexamples can be constructed, as offered herein, that demonstrate the questionable nature of these two algorithms; however, a resolution is offered here to help prevent possible uncritical propagation of the questionable algorithms. As a rigorous ... View full abstract»

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  • On Sampling the Envelope of a Bandlimited Signal

    Publication Year: 1985, Page(s):725 - 728
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (597 KB)

    For x(t) a generalized bandpass signal, either deterministic or zero-mean, wide sense stationary Gaussian, bandlimited to the frequency region characterized by 0 ¿¿0 - ¿/2 ¿|¿|¿ ¿0 +¿/2 ¿ ¿ with positive frequency bandwidth ¿ > 0, it is shown that the squared envelope of x(t) is lowpass and bandlimited to |¿| ¿¿. This contrasts with earlier results which gave the bandwidth of the squ... View full abstract»

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  • Hansen's Method Applied to the Inversion of the Incomplete Gamma Function, with Applications

    Publication Year: 1985, Page(s):728 - 731
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (590 KB)

    Hansen's method for obtaining the threshold for a speciried false alarm probability following noncoherent integration after square law detection is applied to finding the inverse of the incomplete gamma function. The method is algebraic and direct, circumventing the necessity for repeated evaluation of an integral or of a finite series. The method is applied to finding any specified percentile of ... View full abstract»

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  • Erratam: Radiation Supported Space Mirror & Ground Radiation Pattern

    Publication Year: 1985, Page(s): 731
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  • Emendation to "Two Methods of Spectral Estimation for SARSAT Signals"

    Publication Year: 1985, Page(s): 731
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  • Emendations to "Adaptive Tracker Field-of-View Variation via Multiple Model Filtering"

    Publication Year: 1985, Page(s):731 - 732
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  • Emendations to "Particle Velocity Estimation using Kalman Filtering"

    Publication Year: 1985, Page(s): 732
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  • M. Barry Cariton Award for 1985

    Publication Year: 1985, Page(s): 733
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  • Information for authors

    Publication Year: 1985, Page(s): 734
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  • Automation and Robotics for the Space Station: Recommendations

    Publication Year: 1985, Page(s):735 - 743
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1715 KB)

    On January 25, 1984, President Reagan announced a United States program to place a permanent space station in orbit in 1992. The Congressional bill appropriating the funding for this program requires that a significant portion of the program funds be for the development of new automation and robotics technologies not in use on existing spacecraft. To assist it in developing plans to meet this requ... View full abstract»

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  • Call for Pioneer Award Nominations

    Publication Year: 1985, Page(s): 743-a
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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