IEEE Transactions on Automatic Control

Issue 3 • March 1986

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Displaying Results 1 - 25 of 30
  • [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): 193
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  • An analysis ofH^{∞}-pptimization design methods

    Publication Year: 1986, Page(s):194 - 200
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (907 KB)

    The purpose of this paper is to evaluate feedback systems designed usingH^{infty}-optimization techniques with regard to their ability to satisfy classical design criteria. View full abstract»

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  • Stability analysis of hybrid composite dynamical systems: Descriptions involving operators and differential equations

    Publication Year: 1986, Page(s):216 - 226
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (878 KB)

    We address the stability analysis of composite hybrid dynamical feedback systems of the type depicted in Fig. 1, consisting of a block (usually the plant) which is described by an operatorLand of a finite-dimensional block described by a system of ordinary differential equations (usually the controller). We establish results for the well-posedness, attractivity, asymptotic stability, un... View full abstract»

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  • A Lyapunov theory for linear time-delay systems

    Publication Year: 1986, Page(s):259 - 261
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (322 KB)

    Some relationships between a Lyapunov based stability test and linear control system models with time delays are explored. The main result is a generalization of the result that if (A, B) is a reachable pair of matrices, then squareAis a stability matrix if and only if there is a positive-definite matrixKsuch thatAK + KA' = - BB'. View full abstract»

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  • Cost sensitivity analysis for discrete-time optimal feedback controllers with time-multiplied performance indexes

    Publication Year: 1986, Page(s):262 - 263
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (206 KB)

    The sensitivity of a class ofNth order time-multiplied performance costs for discrete-time optimal output feedback systems is investigated. Sensitivity matrices for optimal costs are evaluated with respect to variations in system parameters and design variables. The derivation of sensitivity matrices can be readily obtained by considering the Lagrangian of the performance index. It is s... View full abstract»

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  • An efficient method to compute consistent estimates of the AR parameters of an ARMA model

    Publication Year: 1986, Page(s):275 - 278
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB)

    A computationally efficient method for consistent estimation of the AR parameters of an ARMA model is obtained, based on an iterated least-squares approach proposed by Tsay and Tiao. The method is derived from the lattice filter structure which generates an orthogonal basis for the Hilbert space of interest. It is shown that for the ARMA (p, q) model, we can get consistent estimates of ... View full abstract»

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  • State estimation in discrete m-D systems

    Publication Year: 1986, Page(s):280 - 283
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (382 KB)

    In this study observers and stochastic state estimation form- D systems are considered. The analysis uses a wave advance process model in transporting the existing 1-D results to them-D setting. A constrained minimization technique is used to compute the optimal state estimator which preserves quarter plane causality. The optimal state estimator, without the quarter plane cau... View full abstract»

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  • Optimization of adaptive identification for time-varying filters

    Publication Year: 1986, Page(s):283 - 287
    Cited by:  Papers (80)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (525 KB)

    Adaptive identification in a time-varying context is studied when controlled by the LMS algorithm with constant gain μ, under the assumption of correlated successive input vectors, it is well known by experience that the tracking mean square error (MSE)epsilon(mu)results from the tradeoff between the gradient part which is μ-increasing and the lag contribution which is μ-... View full abstract»

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  • Comments on "On the type of linear multivariable systems"

    Publication Year: 1986, Page(s):287 - 288
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (177 KB)

    The internal model principle is interpreted for unity feedback systems and then used to compare the results of the research of system type. It is shown that the internal model principle provides more insight into the problem and can be used to address a number of issues which cannot be clarified by the study of the system type. We believe that the study of system types can be covered by the intern... View full abstract»

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  • [Back cover]

    Publication Year: 1986, Page(s): 0
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    Freely Available from IEEE
  • Measuring how far a controllable system is from an uncontrollable one

    Publication Year: 1986, Page(s):249 - 251
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The main goal of this note is to explore some of the properties of a controllable system which, in a precise sense to be defined, is near an uncontrollable pair. To do this, we first discuss the notion of the distance between a controllable system and the nearest uncontrollable one in both real and complex cases [2]-[5]. When this distance is relatively small, we show to what extent this distance ... View full abstract»

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  • A note on the fundamental robustness theorem of Lehtomaki

    Publication Year: 1986, Page(s):255 - 258
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    Using a modified Nyquist contour, it is shown how to eliminate one of the conditions in Lehtomaki's fundamental robustness theorem [4]. The condition requires that the nominal open-loop characteristic polynomial be zero at each point on the imaginary axis where the perturbed open-loop characteristic polynomial has a root. Furthermore, the fundamental theorem is generalized to handle nonsquare tran... View full abstract»

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  • General response formula for two-dimensional linear systems with variable coefficients

    Publication Year: 1986, Page(s):278 - 280
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A new definition of the transition matrix for a general 2-D system model with variable coefficients is presented. The general response formula for the general 2-D system model with variable coefficients is derived. Solution to the first and the second Fornasini-Marchesini models with variable coefficients are also given. View full abstract»

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  • On the solution of a class of algebraic matrix Riccati equation

    Publication Year: 1986, Page(s):252 - 255
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    We consider the algebraic matrix Riccati equation of control theory arising with a scalar control. It is shown that, if the Riccati equation is taken in phase-variable canonical form, the solution may be effected by solving a scalar polynomial equation whose degree is that of the unknown matrix. The resolution of the problem involves only elementary algebraic operations on the solution of the scal... View full abstract»

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  • Optimal infinite-horizon control and the stabilization of linear discrete-time systems: State-control constraints and nonquadratic cost functions

    Publication Year: 1986, Page(s):264 - 266
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Stability results are given for a class of feedback systems arising from the regulation of time-invariant, discrete-time linear systems using optimal infinite-horizon control laws. The class is characterized by joint constraints on the state and the control and a general nonlinear cost function. It is shown that weak conditions on the cost function and the constraints are sufficient to guarantee a... View full abstract»

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  • Numerical simulation of trajectory prescribed path control problems by the backward differentiation formulas

    Publication Year: 1986, Page(s):266 - 269
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The equations which describe trajectory, prescribed path control problems naturally form nonlinear semiexplicit, differential-algebraic systems with index greater than one. It is known that not all fully implicit systems may be solved stably by the k-step backward differentiation formulas, yet these methods do produce convergent numerical solutions to some semiexplicit systems. In this note numeri... View full abstract»

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  • The block partial fraction expansion of a matrix fraction description with repeated block poles

    Publication Year: 1986, Page(s):236 - 239
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A state-space technique is developed for finding the block partial fraction expansion of an irreducible right matrix fraction description with distinct and/or repeated block poles. The developed method is the generalized version of the existing methods which consider only distinct block poles. View full abstract»

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  • An algorithm for computing state feedback in multiinput linear systems

    Publication Year: 1986, Page(s):243 - 246
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A new algorithm is proposed in this note to compute the state feedback for arbitrary pole placement in multiinput linear systems. The algorithm has good numerical behavior. It also allows the user to adjust the eigenstructure of the resulting feedback system and, therefore, improve the condition of the problem and computation. View full abstract»

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  • Accuracy of the decoupled Kalman filter

    Publication Year: 1986, Page(s):274 - 275
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    An explicit analytical solution is obtained for the suboptimal covariance matrix of a decoupled Kalman filter. The result is used to determine when filter decoupling breaks down. View full abstract»

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  • On blocking zeros in linear multivariable systems

    Publication Year: 1986, Page(s):239 - 241
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    In this note, the concept of a "blocking zero" is introduced and the relationship between blocking zeros and other zeros (transmission, invariant, system) is discussed. It is shown that the existence of an uncontrollable and/or unobservable mode in a given state-space description of a multiinput, multioutput system is equivalent to a pole-blocking zero cancellation. This can be regarded as an exte... View full abstract»

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  • A note on a computer-aided root-locus method

    Publication Year: 1986, Page(s):246 - 247
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    It is shown that the computer-aided root-locus method suggested by Pan and Chao [3] can be more efficient, reducing cumbersome complex arithmetics, if one incorporates the Bairstow technique for finding roots of real polynomials. View full abstract»

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  • Self-tuning PID controllers: Algorithms and implementation

    Publication Year: 1986, Page(s):201 - 209
    Cited by:  Papers (82)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    A class of controllers with integral action is shown to arise directly from appropriate system models. Via the zero-gain predictor approach, a corresponding class of hybrid self-tuning controllers is shown to have both integral action in the controller and offset removal in the tuning algorithm. Implementation details and some experimental results are given. View full abstract»

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  • Linear quadratic regulators with eigenvalue placement in a vertical strip

    Publication Year: 1986, Page(s):241 - 243
    Cited by:  Papers (53)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    A computational method is presented for finding the linear quadratic regulator such that the optimal closed-loop system has eigenvalues lying within a vertical strip in the complex plane. The proposed method is suitable for the two-stage optimal design of two-time scale systems. View full abstract»

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  • Approximation and bounds in discrete event dynamic programming

    Publication Year: 1986, Page(s):227 - 235
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    This paper presents a general dynamic programming algorithm for the solution of optimal stochastic control problems concerning a class of discrete event systems. The emphasis is put on the numerical technique used for the approximation of the solution of the dynamic programming equation. This approach can be efficiently used for the solution of optimal control problems concerning Markov renewal pr... 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