IEEE Transactions on Automatic Control

Issue 6 • December 1978

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Displaying Results 1 - 25 of 43
  • [Front cover and table of contents]

    Publication Year: 1978, Page(s): 0
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    Freely Available from IEEE
  • Editorial: Some thoughts after two years on the information dissemination committee

    Publication Year: 1978, Page(s):973 - 974
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • Shift Walsh matrix and delay-differential equations

    Publication Year: 1978, Page(s):1023 - 1028
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    Shift Walsh matrix is first introduced. Them times mshift Walsh matrix is formed from them times mWalsh matrix by shifting the columns of the Walsh matrix to the right, dropping the lastk(m geq k > O)columns and assigning firstkcolumns of the new matrix as zero elements. Delay Walsh functions can be expanded in terms of Walsh functions using shift Wal... View full abstract»

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  • Output deadbeat controllers with stability for discrete-time multivariable linear systems

    Publication Year: 1978, Page(s):1036 - 1043
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (651 KB)

    This short paper Treats the problem of designing output deadbeat controllers having the property that the control input to the system converges to zero as time goes to infinity, for discrete-time multivariable linear systems. Two configurations of controllers are considered: one is of state feedback; the other is a dynamic controller using an observer. The existence of such controllers is examined... View full abstract»

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  • Greatest common divisor via generalized Sylvester and Bezout matrices

    Publication Year: 1978, Page(s):1043 - 1047
    Cited by:  Papers (121)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    We present new methods for computing the greatest common right divisor of polynomial matrices. These methods involve the recently studied generalized Sylvester and generalized Bezoutian resultant matrices, which require no polynomial operations. They can provide a row proper greatest common right divisor, test for coprimeness and calculate dual dynamical indices. The generalized resultant matrices... View full abstract»

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  • The existence and uniqueness of Volterra series for nonlinear systems

    Publication Year: 1978, Page(s):1090 - 1095
    Cited by:  Papers (84)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    Given an input-output map described by a nonlinear control systemdot{x}=f(x,u)and nonlinear outputy=h(x), we present a simple straightforward means for obtaining a series representation of the outputy(t)in terms of the inputu(t). When the control enters linearly,dot{x} =f(x)+ ug(x), the method yields the existence of a Volterra series represen... View full abstract»

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  • Stable proper nth-order inverses

    Publication Year: 1978, Page(s):1104 - 1106
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    A stable proper right (left)nth-order inverse of a given linear time-invariant system of orderncan always be constructed, via a simple algorithm, if a proper right (left) inverse exists and the zeros of the given system are stable. Furthermore, it is shown that all of the poles of this inverse can be arbitrarily assigned except those which equal the zeros of the given system. View full abstract»

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  • Author's reply

    Publication Year: 1978, Page(s): 1116
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    First Page of the Article
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  • Comments on "New estimation algorithms for nonlinear continuous systems with multiple delays"

    Publication Year: 1978, Page(s):1116 - 1117
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (213 KB)

    This technical note points out certain inaccuracies in the results presented in the above correspondence. View full abstract»

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  • Comments on "A note on the Routh-Hurwitz criterion"

    Publication Year: 1978, Page(s): 1116
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    In a recent note, it was pointed out that the "ε method" in the application of Routh-Hurwitz criterion fails when the characteristic equation has an arbitrarily small coefficient In this correspondence it is shown that the cause of such a failure is the wrong interpretation of the arbitrariness of ε. View full abstract»

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  • Correction to "An invalid norm appearing in control and estimation"

    Publication Year: 1978, Page(s):1117 - 1118
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    Two counterexamples are presented in the above correspondence [1] to demonstrate that|A|_{3},the minimum of the standard column-sum norm(|A|_{1})and the row-sum norm(|A|_{2}), is not a valid norm. While these observations are correct, there is an error in [1] in the argument used to justify the use of|A|_{3}as a convergence test. This error is corrected ... View full abstract»

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  • [Back cover]

    Publication Year: 1978, Page(s): 0
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • System theory: A unified state-space approach to continuous and discrete-time systems

    Publication Year: 1978, Page(s):1118 - 1119
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    First Page of the Article
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  • A scheme for determining stepsizes for unconstrained optimization methods

    Publication Year: 1978, Page(s):987 - 995
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    We present a new scheme for determining stepsizes for iterative unconstrained minimization methods. This scheme provides a stepsize estimate for the efficient Armijo-type stepsize determination rule and improves its performance. As examples for the new scheme, we also present a new gradient algorithm and a new conjugate gradient algorithm. These two algorithms are readily implementable and eventua... View full abstract»

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  • Elimination of the real positivity condition in the design of parallel MRAS

    Publication Year: 1978, Page(s):1015 - 1020
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    All the algorithms developed hitherto in order to obtain a global asymptotically stable "parallel" MRAS (model reference adaptive system) require that a certain transfer function should be made strictly positive real. This condition is restrictive in the case of parallel MRAS used as identifiers or as adaptive state observers, because part of the unknown parameters of the plant to be identified ap... View full abstract»

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  • Three important matrix inequalities currently impacting control and estimation applications

    Publication Year: 1978, Page(s):1110 - 1111
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    This correspondence traces the origin of three simple but powerful matrix inequalities that have arisen in many diverse control and estimation studies. The purpose of this slightly critical discussion is to stimulate an awareness of the variety of applications for these inequalities and by so doing, hopefully, to reduce the period for their reappearance in the control and estimation theory literat... View full abstract»

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  • An algorithm for obtaining the minimal realization of a linear time-invariant system and determining if a system is stabilizable-detectable

    Publication Year: 1978, Page(s):1048 - 1054
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A definition of centralized fixed modes of a system, which is an adoption of the definition of fixed modes for a decentralized system [1], is made. It is shown that the centralized fixed modes of a system can be easily and efficiently calculated in terms of the eigenvalues of the system, and that the calculation of such fixed modes enables one to determine, in a numerically efficient way, whether ... View full abstract»

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  • An iterative coordination approach to decentralized decision problems

    Publication Year: 1978, Page(s):1031 - 1036
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Splitting methods are examined for the iterative solution of the classical linear least-squares problem in Hilbert space. Conditions for convergence of the class of iterations studied generalize existing conditions in the literature. Throughout, the emphasis is on an organization-theoretic interpretation of the algorithm, thereby clarifying certain questions of decentralization of information and ... View full abstract»

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  • Global asymptotic stability of a nonlinear parabolic equation

    Publication Year: 1978, Page(s): 1114
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    Necessary and sufficient conditions are derived for the asymptotic stability of a nonlinear parabolic equation. Spatial Fourier transformation converts the stability determination to that for an infinite system of ordinary differential equations, and facilitates approximate to exact solutions, depending on the boundary conditions, the nonlinearities, and the harmonic content of the steady-state di... View full abstract»

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  • Stabilized suboptimal periodic control of a chemical reactor

    Publication Year: 1978, Page(s):1005 - 1008
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The suboptimal periodic state of a chemical reactor which is unstable under open-loop control is realized and stabilized by applying a simple closed-loop relay control. The method of return state difference in which the computer simulation technique is effectively utilized is developed and used for the stability analysis of the relay control systenm. View full abstract»

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  • Design of sensitivity-reducing compensators using observers

    Publication Year: 1978, Page(s):1058 - 1062
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    In this paper the design of compensators for output feedback systems which satisfy a sensitivity, reduction criterion is considered for the case when the dynamic compensator is an observer. Using the conditions for comparison sensitivity design of output feedback systems derived by Naeije and Bosgra [4], it is shown that for arbitrary stable state-observers (full or reduced order) there exist feed... View full abstract»

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  • On the stabilization of closed-loop stabilizable systems

    Publication Year: 1978, Page(s):1103 - 1104
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    The question of stabilizing unity feedback linear systems through the employment of proper feedforward compensators is important in many aspects of control theory. Although it appears to be well-known that a large class of linear systems, namely those which might be termed "closed-loop stabilizable," can be so stabilized, it is difficult to find a definitive reference which establishes this observ... View full abstract»

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  • Calculation of Pareto-optimal solutions to multiple-objective problems using threshold-of-acceptability constraints

    Publication Year: 1978, Page(s):1114 - 1115
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    A technique is presented for the calculation of Pareto-optimal solutions to a multiple-objective constrained optimization problem by solving a series of single-objective problems. Threshold-of-acceptability constraints are placed on the objective functions at each stage to both limit the area of search and to mathematically guarantee convergence to a Pareto optimum. View full abstract»

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  • On the state-space realizations of matrix fraction descriptions for multivariable systems

    Publication Year: 1978, Page(s):1054 - 1058
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    A new representative of the state is introduced. This makes a connection between the input/output description of the system (in terms of module theory) and the state-space description (in terms of abstract linear algebra) via the transfer function methods of Rosenbrock and the operator-form realization of Fuhrmann. The state and the realization are both expressed explicitly in terms of a minimal m... View full abstract»

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  • Design optimization of microprocessor-based remote multiplexing systems

    Publication Year: 1978, Page(s):975 - 986
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    A physical model of a microprocessor-based remote multiplexing system is constructed, based on the physical layout of the plant and the distribution of input/output variables. A cost index is generated based on the above model, which when maximized, yields a maximum solution that defines the cost optimal number, location and load of the remote systems. The optimal solution is determined by simulat... 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