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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
  • Continuous-time observers with delayed sampled data

    Publication Year: 1978, Page(s):1107 - 1109
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A theory and design procedure for continuous-time full-order observers driven by delayed sampled data is presented. An example is included to illustrate the advantage of this method. View full abstract»

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  • 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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  • Guaranteed ultimate boundedness for a class of uncertain linear dynamical systems

    Publication Year: 1978, Page(s):1109 - 1110
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    We consider a class of linear dynamical systems with uncertainty in the system matrix, input matrix, input, and state measurement. Based solely on the knowledge of the uncertainty bounds, we give a measured state feedback control that guarantees uniform boundedness and ultimate boundedness in a certain neighborhood of the zero state. View full abstract»

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  • Time-optimal feedback control for small disturbances

    Publication Year: 1978, Page(s):1095 - 1099
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    This paper introduces a new technique for the analysis of time-optimal systems having multidimensional inputs. The method provides a cellular decomposition of the controllable set for small response times for a new generic class of systems called "minimally controllable systems." The decomposition permits a complete study of the time-optimal flow near the origin and forms the basis for the synthes... 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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  • A note on commutative bilinear optimal control

    Publication Year: 1978, Page(s): 1111
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    For optimal control problems with bilinear dynamics and quadratic cost, the assumption of commutativity is extremely strong and reduces the problem to the classical one of least action. View full abstract»

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  • Optimal scheduling of thermal generating units

    Publication Year: 1978, Page(s):1000 - 1005
    Cited by:  Papers (56)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    Scheduling the operation of thermal generating units involves the selection of units to be placed in operation and the allocation of the load among them- These two decisions must be taken so as to minimize the sum of tile startup, banking, and expected riming costs subject to the demand, spinning-reserve, and minimum down-time and up-time constraints and, sometimes, to the following two additional... 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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  • 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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  • 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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  • 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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  • Unstable suboptimal periodic control of a certain chemical reactor

    Publication Year: 1978, Page(s):1111 - 1113
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The suboptimal periodic control of a CSTR (continuous stirred tank reactor) in which two reactions are occurring in parallel is sought by use of a computer simulation technique. The results indicate that the corresponding suboptimal periodic state may be unstable under open-loop control and, consequently, some stabilization technique which will be proposed in another work is required. Structure an... View full abstract»

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  • A study of frequency prediction for power systems

    Publication Year: 1978, Page(s):996 - 1000
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A frequency predictor is identified from simulated measurements of power and frequency on a power system. An on-line Ieast-squares algorithm is used along with a new system structure test for model order identification. A comparison of this system structure test with other model order identification tests is also included. The performance of the resultant predictor is then determined as a function... 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