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IEEE Transactions on Automatic Control

Issue 12 • December 1986

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

    Publication Year: 1986, Page(s): 0
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1986, Page(s): 1089
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    Freely Available from IEEE
  • Editorial: Bringing the excitement back

    Publication Year: 1986, Page(s): 1090
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    Freely Available from IEEE
  • A symplectic QR like algorithm for the solution of the real algebraic Riccati equation

    Publication Year: 1986, Page(s):1104 - 1113
    Cited by:  Papers (67)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    A method is presented to solve the real algebraic Riccati equation -XNX + XA + A^{T}X + K = 0, whereK = K^{T}andN = N^{T}. The solution for the corresponding eigenvalue problemMx = lambda x, whereMis a Hamiltonian matrix, is computed by an algorithm similar to the QR algorithm. Special symplectic matrices are used for the transformation of View full abstract»

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  • A projection approach to covariance equivalent realizations of discrete systems

    Publication Year: 1986, Page(s):1114 - 1120
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (701 KB)

    Covariance equivalent realization theory has been used recently in continuous systems for model reduction [1]-[4] and controller reduction [2], [5]. In model reduction, this technique produces a reduced-order model that matchesq + 1output covariances andqMarkov parameters of the full-order model. In controller reduction, it produces a reduced controller that is "close" to mat... View full abstract»

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  • On the robustness of linear continuous-time dynamic systems

    Publication Year: 1986, Page(s):1136 - 1138
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    In this note, for a given linear continuous-time dynamic systemdot{x} = Ax + Bu, we determine sufficient conditions for the existence of a constant feedback matrixksuch that the closed-loop system matrixA - Bkadmits a diagonal positive solution of the Lyapunov equation. An algorithm for the determination of suchkmatrix is given and some examples are solv... View full abstract»

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  • Poor convergence in applying an optimal integral regulator to a system with a RHS zero

    Publication Year: 1986, Page(s):1143 - 1146
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Necessary and sufficient conditions of the optimal regulator incorporating integral feedback were given by Porter Ill and Smith and Davison [2]. This note presents a problem of poor convergence in an iterative solution of the discrete Riccati equations when an optimal regulator incorporatingr = mintegral feedback is applied to a system which has a zero on the RHS ofs-plane, w... View full abstract»

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  • A computational method for infinite-time optimal regulation problems

    Publication Year: 1986, Page(s):1146 - 1149
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    It is shown that, when an infinite-time optimal regulation problem is solved via a method of increasing the terminal time tfof a corresponding finite-time problem, convergence can be accelerated by incorporating a quadratic terminal weightx(t_{f})^{T} Px(t_{f}), wherePis the steady-state solution of the Riccati equation for a corresponding truncated linear quadrati... View full abstract»

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  • Stability regions for multiloop LQ-regulated systems with state estimators

    Publication Year: 1986, Page(s):1151 - 1153
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (285 KB)

    This note investigates the closed-loop stability of linear, time-invariant systems controlled by linear-quadratic-Gaussian (LQG) type controllers, when the actuators have nonlinearities. The nonlinearitiesN(sigma)are assumed to violate the standard LQ robustness conditionsigmaN(sigma) geq 0.5sigma^{2}, either for values of σ away fromsigma = 0, or in a neighbo... View full abstract»

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  • Solution in the z-domain to the discrete-time stationary Kalman filtering problem for systems with perfect measurements

    Publication Year: 1986, Page(s):1156 - 1159
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (414 KB)

    The discrete-time stationary Kalman filtering problem is solved in thez-domain for general right invertible linear systems whose measurements are all noise free. A simple expression in closed form is obtained for the transfer function of the optimal filter both for the uniform and the general nonuniform rank cases. It provides an optimal solution also for systems with uniform and nonuni... View full abstract»

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  • Comments on "On blocking zeros in linear multivariable systems"

    Publication Year: 1986, Page(s):1175 - 1176
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (213 KB)

    It is suggested that the name "blocking zeros" in the above technical note is not appropriate and should be changed in order to avoid confusion in the literature. View full abstract»

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  • Author's reply

    Publication Year: 1986, Page(s): 1176
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (137 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1986, Page(s): 0
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    Freely Available from IEEE
  • Adaptive stabilization of linear systems via switching control

    Publication Year: 1986, Page(s):1097 - 1103
    Cited by:  Papers (133)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    In this paper, we develop a method for adaptive stabilization without a minimum-phase assumption and without knowledge of the sign of the high-frequency gain. In contrast to recent work by Martensson [8], we include a compactness requirement on the set of possible plants and assume that an upper bound on the order of the plant is known. Under these additional hypotheses, we generate a piecewise li... View full abstract»

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  • Parameter identification in a process-model system

    Publication Year: 1986, Page(s):1173 - 1175
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Parameter identification in a process-model control system, in which the controller involves a model of the process, is presented. The identification is performed through using information about the difference between the actual and specified responses. The identification procedure is based on an expression for the prediction of the controlled response as a linear function in the process parameter... View full abstract»

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  • On the computation of sensitivity functions of linear time-invariant systems responses via diagonalization

    Publication Year: 1986, Page(s):1141 - 1143
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    This note presents a method for computing the sensitivity functions of parametrized linear time-invariant systems, for the case where the system matrix A is diagonalizable. The method is based on a formula, derived in the note, for the sensitivity of an exponential of a diagonalizable matrix. View full abstract»

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  • Toward a feasible variable structure control design for a synchronous machine connected to an infinite bus

    Publication Year: 1986, Page(s):1159 - 1163
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    This note details the design of a nonlinear controller to achieve transient stability of a synchronous machine connected to an infinite bus. The design method combines the use of variable structure control, nonlinear transformation techniques, and linear system theory to develop a switched control law to drive the machine from a perturbed, unstable state to a desired equilibrium point and to maint... View full abstract»

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  • Dynamic output feedback control of a class of uncertain systems

    Publication Year: 1986, Page(s):1163 - 1165
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    A dynamic output feedback controller, which guarantees global uniform ultimate boundedness, is derived for a class of single-input, single-output systems with bounded uncertainty. The main feature of the approach is that the positive real condition, required by the static output feedback design method of [1], is not imposed on the class of systems considered here. View full abstract»

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  • On recursiveness and related topics in linear systems

    Publication Year: 1986, Page(s):1121 - 1135
    Cited by:  Papers (57)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1416 KB)

    A decomposition of matrix formal power series (linear systems) is developed. The interconnections between formal power series, realization (Padé approximation), recursiveness (Berlekamp-Massey algorithm), feedback interconnections, (matrix) linear fractional representations, (matrix) continued fractions and the (matrix) Euclidean algorithm are thereby revealed. View full abstract»

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  • Loop transfer recovery techniques for discrete-time optimal regulators using prediction estimators

    Publication Year: 1986, Page(s):1149 - 1151
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    For discrete-time LQG optimal regulators using current estimators, it has been shown that perfect recoveries of the loop transfer matrices at the input or at the output are possible for square minimum-phase systems. However, current estimators cannot be used when the processing time of the controller is significant. In this note, the loop transfer recoveries using prediction estimators for square ... View full abstract»

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  • Stabilization of hyperbolic systems using concentrated sensors and actuators

    Publication Year: 1986, Page(s):1091 - 1096
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    Certain hyperbolic systems of partial differential equations which are known to be uniformly asymptotically stabilizable using point sensors/actuators (S/A) are considered. The issue to be investigated is the effect on stability when point S/A's are replaced by "concentrated" S/ A's, that is, S/A's which average over small regions of the spatial domain. Although it is known that passing from point... View full abstract»

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  • Target image tracking using a nonlinear filter based on Pontryagin minimum principle

    Publication Year: 1986, Page(s):1170 - 1173
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The major contribution of this technical note is the introduction of a new nonlinear filter, based on Pontryagin minimum principle and the method of invariant imbedding, as applied to spatial filtering of FLIR image sequences. This filler is used to improve the signal-to-noise ratio (SNR) of each frame. The target center is then estimated using different approaches. It is shown, through Monte Carl... View full abstract»

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  • Eigenstructure assignment in descriptor systems

    Publication Year: 1986, Page(s):1138 - 1141
    Cited by:  Papers (68)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Coordinate free conditions are given for pole assignment by feedback in linear descriptor (singular) systems which guarantee closed-loop regularity. These conditions are shown to be both necessary and sufficient for assignment of the maximum possible number of finite poles. Transformation to special coordinates are not used and the results provide a robust algorithm for the computation of the requ... View full abstract»

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  • An algorithm for a solution of a stochastic adaptive linear quadratic optimal control problem

    Publication Year: 1986, Page(s):1165 - 1170
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    A variational approach is taken to derive optimality conditions for a discrete-time linear quadratic adaptive stochastic optimal control problem. These conditions lead to an algorithm for computing optimal control laws which differs from the dynamic programming algorithm. View full abstract»

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  • Deadbeat control of linear discrete-time systems by periodic output-feedback

    Publication Year: 1986, Page(s):1153 - 1156
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Two deadbeat control problems for open-loop, time-invariant linear, discrete-time multivariable systems by periodic output-feedbacks are formulated and solved. Sufficient conditions for the existence of solutions to the problems are established. Procedures for finding solutions to the problems are presented and illustrated by numerical examples. 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

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Meet Our Editors

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