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IEEE Transactions on Automatic Control

Issue 8 • Date August 1985

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Displaying Results 1 - 25 of 34
  • [Front cover and table of contents]

    Publication Year: 1985, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (193 KB)
    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1985, Page(s): 0
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    Freely Available from IEEE
  • Linear system reduction by impulse energy approximation

    Publication Year: 1985, Page(s):784 - 786
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A method is given for linear system reduction which is a more general form of the Routh method. The reduced models retain stability, and a fuller contribution is made to the impulse response energy of the reduced system by appropriate selection of retained alpha and beta parameters. It requires no more computation than the Routh method and can be presented in a compact tabular form. Examples are g... View full abstract»

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  • Optimal control of admission to a queueing system

    Publication Year: 1985, Page(s):705 - 713
    Cited by:  Papers (200)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    Congestion in a queueing system can sometimes be controlled by restricting arrivals, either by "closing a gate" or by charging an entrance fee or toll. We review both static (open-loop) and dynamic (closed-loop) models for control of admission to a queueing system. The main emphases are on the difference between socially optimal and individually optimal (equilibrium) controls and on the use of dyn... View full abstract»

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  • Adaptive stabilization of a discrete linear system with an unknown high-frequency gain

    Publication Year: 1985, Page(s):798 - 799
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    This paper presents a simple algorithm for adaptively stabilizing a linear one-dimensional discrete-time process. Prior knowledge of the sign of the process high-frequency gain is not required, and the adaptive control law is a continuous function of its arguments. View full abstract»

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  • Reduced gradient computation in prediction error identification

    Publication Year: 1985, Page(s):776 - 778
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    One way to design practical identification algorithms using the prediction error method is to find a computationally efficient expression for the gradient of the prediction error cost function. Here, results on adjoint equations are used to derive an efficient gradient expression which reduces the computational burden of evaluating it. View full abstract»

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  • Model reduction via a quasi-Kalman decomposition

    Publication Year: 1985, Page(s):786 - 790
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    A system theoretic model reduction algorithm is proposed which appears to be simple to work with. The algorithm is based on a quasi-Kalman decomposition. View full abstract»

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  • Global external linearization of nonlinear systems via feedback

    Publication Year: 1985, Page(s):808 - 811
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    This note presents necessary conditions and sufficient conditions for an affine nonlinear system to be globally feedback equivalent to a controllable linear system over an open subset V of Rn. When V equals Rn, necessary and sufficient conditions are obtained. View full abstract»

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  • Asymptotic stability improvements of multiparameter nonlinear singularly perturbed systems

    Publication Year: 1985, Page(s):802 - 804
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    In this note we study the asymptotic stability properties of multiparameter singularly perturbed systems. We show that by introducing a new fast variable, improved results are obtained for estimating the upper bound of the perturbation parameter and the region of attraction. An example is provided to demonstrate the improvements. View full abstract»

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  • On the estimation of asymptotic stability regions: State of the art and new proposals

    Publication Year: 1985, Page(s):747 - 755
    Cited by:  Papers (119)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    This paper deals with the problem of the estimation of regions of asymptotic stability for continuous, autonomous, nonlinear systems. The first part of the work provides a comprehensive survey of the existing methods and of their applications in engineering fields. In the second part certain topological considerations are first developed and the "trajectory reversing method" is then presented toge... View full abstract»

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  • Nonparametric kernel algorithm for recovery of functions from noisy measurements with applications

    Publication Year: 1985, Page(s):782 - 784
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    This note presents a kernel algorithm for recovery of a regression function from noisy data. Conditions are provided that assure pointwise convergence in the mean square and almost sure senses. An application to a class of linear system identification problems is discussed. View full abstract»

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  • A globally convergent adaptive pole placement algorithm without a persistency of excitation requirement

    Publication Year: 1985, Page(s):795 - 798
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    This paper presents an indirect adaptive control scheme for deterministic plants which are not necessarily minimum phase. Global convergence is established for the scheme in the sense that the closed-loop poles are asymptotically assigned for the given data sequence and the system input and output remain bounded for all time. A key feature of the scheme is that no persistency of excitation conditi... View full abstract»

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  • Signal estimation for second-order vector difference equations

    Publication Year: 1985, Page(s):771 - 773
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    This note considers a linear estimation problem for a stochastic process viewed as the output signal of a linear second-order vector difference equation (VDE) driven by a white-noise input. An innovations approach is applied directly to develop the one-stage prediction estimator and associated error covariances. It is shown that the estimator can be expressed as a second-order recursion that prese... View full abstract»

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  • Stabilization and regulation of nonlinear singularly perturbed systems--Composite control

    Publication Year: 1985, Page(s):739 - 747
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    For a general class of nonlinear singularly perturbed systems, a two-time-scale analysis and design procedure for stabilization and regulation is presented. It is shown that, under a set of conditions, the composite control proposed by Chow and Kokotovic [5], asymptotically stabilizes the desired equilibrium and produces a finite cost Juc, which tends to the cost of the slow regulator a... View full abstract»

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  • Time scale modeling of sparse dynamic networks

    Publication Year: 1985, Page(s):714 - 722
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    This paper develops a time-scale approach to the decomposition and aggregation of dynamic networks with dense and sparse connections. Two parameters are used to characterize time-scale and weak coupling properties. Bounds in terms of these parameters determine when there are two time-scales in sparse networks. Simplified models of the slow and fast subsystems are proposed and physical interpretati... View full abstract»

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  • The generalized matrix continued-fraction descriptions in the second Cauer form

    Publication Year: 1985, Page(s):813 - 816
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    This note presents two generalized matrix continued-fraction descriptions in the second Cauer form obtained from a nonsingular rational matrix and/or polynomial matrix fraction descriptions. Computational algorithms are developed for the expansion and inversion of the generalized matrix continued-fraction descriptions which are useful in developing applications to multivariable control systems. View full abstract»

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  • Linearization of nonlinear systems about constant operating points

    Publication Year: 1985, Page(s):804 - 808
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    For bilinear-realizable nonlinear systems described by a Volterra series, an input-output definition of the linearized system about a constant operating point is given. This definition is then compared to the usual notion of linearization in terms of a bilinear realization of the nonlinear system. Properties of the linearized system with respect to the original nonlinear system are developed, and ... View full abstract»

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  • Nonlinear versus linear control in the direct output feedback stabilization of linear systems

    Publication Year: 1985, Page(s):799 - 802
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    This paper investigates the use of nonlinear direct output feedback in the control of linear time-invariant systems. Inparticular, it is concerned with those nonlinear controllers which result in a closed loop system which is quadratically stable. That is, the closed loop nonlinear system is asymptotically stable and furthermore, a quadratic Lyapunov function can be used to establish this stabilit... View full abstract»

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  • A quasi-linear estimation method--Application to Kalman filtering with stochastic regressors

    Publication Year: 1985, Page(s):767 - 771
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    An estimation method, called quasi-linear estimation, is presented. Quasi-linear estimation is aimed to give an intermediate possibility between linear and nonlinear estimation. A quasi-linear estimator of a parameter vector a given two observation vectors y and z is defined to be of the form View full abstract»

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  • On 2-D pole placement

    Publication Year: 1985, Page(s):819 - 822
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The problem of characteristic polynomial assignment by dynamic output feedback in 2-D systems is solved via 2-D polynomial methods. A simple necessary and sufficient condition is given. The class of all assignable characteristic polynomials is described in a parametric form. Stable and causal solutions are treated. View full abstract»

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  • Optimal algorithms theory for robust estimation and prediction

    Publication Year: 1985, Page(s):730 - 738
    Cited by:  Papers (137)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    This paper deals with the theory of optimal algorithms for problems which cannot be solved exactly. The theory developed allows for the derivation of new and interesting results in parameter estimation and in time series prediction in situations where no reliable statistical hypothesis can be made on the functions and modeling errors involved, but only a bound on them is known, in particular, the ... View full abstract»

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  • Player aggregation in the traveling inspector model

    Publication Year: 1985, Page(s):723 - 729
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    We consider a model of dynamic inspection/surveillance of a number of facilities in different geographical locations. The inspector in this process travels from one facility to another and performs an inspection at each facility he visits. His aim is to devise an inspection/ travel schedule which minimizes the losses to society (or to his employer) resulting both from undetected violations of the ... View full abstract»

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  • A simplified minimal realization of a transfer-function matrix using its modified Markov parameters

    Publication Year: 1985, Page(s):816 - 818
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A technique for the simplified minimal realization of a transfer function matrix by its expansion about an arbitrary point " a " is proposed. The resulting quadruple [ A, B, C, D ] from this technique is more general than the quadruple [ A, B, C, D ] resulting from existing techniques... View full abstract»

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  • Application of improved optimal regulator theory to optimal efficiency control of an electrical drive system

    Publication Year: 1985, Page(s):822 - 825
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A new method to synthesize a speed control system for a dc-motor which attains maximum efficiency is proposed on the basis of an improved optimal regulator theory. Almost maximum efficiency is attained with negligible steady-state error except at the transient state. Considerable improvements on the efficiency at the steady state are obtained, compared to the usual control method in which only arm... View full abstract»

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  • Minimal-order Wiener filter for a system with exact measurements

    Publication Year: 1985, Page(s):773 - 776
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Necessary and sufficient conditions for the existence of an optimal steady-state state estimator are derived under the assumption that this estimator is a linear functional of the measurements and a finite number of derivatives of the exact measurements. Our conditions are shown to be dual to the generalized Legendre-Clebsch conditions of the dual optimal singular regulator. A separation principle... View full abstract»

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Aims & Scope

In the IEEE Transactions on Automatic Control, the IEEE Control Systems Society publishes high-quality papers on the theory, design, and applications of control engineering.  Two types of contributions are regularly considered

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
P. J. Antsaklis
Dept. Electrical Engineering
University of Notre Dame