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IEEE Transactions on Automatic Control

Issue 4 • Date August 1982

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Displaying Results 1 - 25 of 54
  • [Front cover and table of contents]

    Publication Year: 1982, Page(s): 0
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  • Comments on model reduction by minimizing the equation error

    Publication Year: 1982, Page(s):1000 - 1002
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (279 KB)

    Minimization of the equation error is a well-known and powerful tool, which has been introduced to the reduction of time-invariant linear systems independently by Obinata and Inooka [1], [2] and by Eitelberg [3]-[5]. The purpose of this note is to examine critically the methods in [1], [2] and to propose to the readers of IEEE TRANSACTIONS ON AUTOMATIC CONTROL an altenative formalism, which has be... View full abstract»

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  • Comments on an approximation coefficient proposed in 'stochastic model simplification

    Publication Year: 1982, Page(s):1002 - 1004
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (286 KB)

    It is pointed out that the approximation coefficient defined in the above paper does not always satisfy the claimed properties. An alternative definition is suggested. View full abstract»

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  • Comment on "A new configuration for linear filtering problems"

    Publication Year: 1982, Page(s): 1004
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (98 KB)

    A simplified argument is presented for the results of the above paper. View full abstract»

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  • Authors' reply

    Publication Year: 1982, Page(s): 1004
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (98 KB)

    First Page of the Article
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  • Author's reply

    Publication Year: 1982, Page(s):1006 - 1007
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

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  • Advanced process control

    Publication Year: 1982, Page(s):1007 - 1009
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (386 KB)

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  • [Back cover]

    Publication Year: 1982, Page(s): 0
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    Freely Available from IEEE
  • A decomposition technique for an optimal control problem with "PQDZ" cost and bounded controls

    Publication Year: 1982, Page(s):947 - 951
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    In this note we present a solution method for a discrete-time linear optimal control problem where the controls are bounded and both the states and controls have asymmetric costs with dead zones containing the nominal values. This model generalizes the well-known optimal control model for a linear system with symmetric (quadratic) objective functional. We transform the problem into an equivalent l... View full abstract»

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  • Generalized functional reproducibility condition for nonlinear systems

    Publication Year: 1982, Page(s):958 - 960
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    A new sufficient condition for the existence of control to generate a given real analytic function as the output of a large class of multivariable nonlinear control system is derived. Furthermore, a prefilter (right-inverse system) is constructed to generate the required control. View full abstract»

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  • LQP: Dominant output feedbacks

    Publication Year: 1982, Page(s):915 - 921
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    An output feedback matrix F will be said to dominate another, \bar{F} , if the cost for F is not higher for any initial condition than the cost for \bar{F} and if the cost is lower for some (perhaps all) initial conditions. The output feedback obta... View full abstract»

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  • Root distribution for the ellipse

    Publication Year: 1982, Page(s):960 - 963
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    It is shown that the number of characteristic roots of a given matrix (or polynomial) inside, outside, and on the boundary, of a given ellipse, can be determined by a common half-plane test (e.g., Routh test). The test should be performed on a polynomial which is received from the original characteristic polynomial by a simple transformation. Root exclusion and root clustering criteria are include... View full abstract»

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  • Sensitivity analysis of distributed parameter systems

    Publication Year: 1982, Page(s):951 - 955
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A method is developed for the calculation of sensitivity coefficients of general distributed parameter systems to the variation of spatially and temporally varying parameters appearing in the system equations and initial and boundary conditions. View full abstract»

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  • On the finite escape phenomena for matrix Riccati equations

    Publication Year: 1982, Page(s):977 - 979
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    We show a necessary and sufficient condition for the solution of Riccati differential equations to escape to the infinity in finite time. This implies that we obtain a necessary and sufficient condition for the existence of the solution of all time t \geq 0 . This condition is given as a rank condition of the matrix which we refer to as the escape criterion m... View full abstract»

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  • A useful input parameterization for optimal experiment design

    Publication Year: 1982, Page(s):986 - 989
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Optimal inputs are usually, determined by minimizing a scalar-valued function of the inverse Fisher information matrix. The function should be monotonically increasing. This is the case, e.g., for the trace and the determinant. The minimization must be performed under some constraints to prevent the input or output amplitude to blow up. In this note it is proved that, assuming open-loop experiment... View full abstract»

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  • Continuous-time stochastic model simplification

    Publication Year: 1982, Page(s):993 - 996
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Approximation of high-order and time-varying linear continuous-time Gaussian models by low-order and time-invariant models is considered. The recent work of Baram and Be'eri pertaining to the discrete-time systems is extended to continuous-time system models. The model simplification is carried out by maximizing the probabilistic ambiguity between the actual system and the approximate model. Diffe... View full abstract»

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  • Transfer function conditions for output feedback disturbance rejection

    Publication Year: 1982, Page(s):974 - 977
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A recent paper [1] has derived state space conditions under which the disturbance transfer function in a linear multivariable system can be zeroed by a dynamic compensator forced by a prescribed set of measurements. The present note derives necessary conditions for this problem in terms of the orders of the open-loop control, disturbance, and measurement transfer functions. These necessary conditi... View full abstract»

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  • The robustness of controllability and observability of linear time-varying systems

    Publication Year: 1982, Page(s):933 - 939
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    Fixed point methods from nonlinear analysis are used to establish conditions under which the uniform complete controllability, of linear time-varying systems is preserved under nonlinear perturbations in the state dynamics and the zero-input uniform complete observability of linear time-varying systems is preserved under nonlinear perturbation in the state dynamics and output read-out map. Robustn... View full abstract»

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  • On the existence of a periodic model for a class of stochastic processes

    Publication Year: 1982, Page(s):991 - 993
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The existence of a periodic solution to a class of nonlinear Riccati equations is considered. A set of conditions to be satisfied by the coefficients of the Riccati equation and proper initial condition leads to the periodic solution. This class of equations appears in the solution to the factorization problem; i.e., determination of a linear system which transforms white noise into a possibly non... View full abstract»

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  • Design of the steering controller of a supertanker using linear quadratic control theory: A feasibility study

    Publication Year: 1982, Page(s):940 - 942
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Linear quadratic regulator (LQR) techniques are applied to the design of the steering controller of a supertanker. A performance criterion representative of propulsion losses related to steering is used as a basis for the design of controllers for course keeping in open seas. The effect of variation of relative weightings in the performance criterion on controller performance when subjected to the... View full abstract»

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  • Relations of moments in composite systems

    Publication Year: 1982, Page(s):967 - 969
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The relations of moments in composite systems can be studied easily by the manipulation of the series expansions of the related transfer function matrices. Using this technique, it is shown that the moments of a compensator which yields some specified moments of a composite system can be given explicitly in terms of related moments. These expressions are useful in systems design. View full abstract»

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  • On the existence of Lyapunov function for absolute stability of nonlinear feedback systems

    Publication Year: 1982, Page(s):963 - 964
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    A Lyapunov function of the form "a quadratic term plus an integral of the nonlinearity" to assure absolute stability, in the sector, of a nonlinear feedback system need not necessarily always satisfy the MKY lemma equations. View full abstract»

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  • On-line parameter identification of bilinear systems

    Publication Year: 1982, Page(s):984 - 986
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    In this correspondence, an on-line identification scheme for bilinear systems is presented. This algorithm is a direct extension of the stochastic approximation algorithm proposed by Saridis and Stein to bilinear systems. The properties of the algorithm are that it does not require knowledge of the noise statistics and that it converges to the true value of the parameters (Volterra kernals) in the... View full abstract»

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  • An asymptotic error analysis of identifiers and adaptive observers in the presence of parasitics

    Publication Year: 1982, Page(s):921 - 927
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The behavior of identifiers and adaptive observers in the presence of parasitics is analyzed. Bounds for the state/parameter error are established. The adaptive schemes considered are shown to be robust provided the input signal is rich for the dominant modes, but does not contain high frequencies in the parasitic range. The bounds indicate possibilities for reducing the error by a proper choice o... View full abstract»

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  • Singular perturbational model reduction in the frequency domain

    Publication Year: 1982, Page(s):969 - 970
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    Singular perturbational approximations for linear continuous-time and discrete-time systems are developed in the frequency domain. It is shown that the familiar singular perturbational result is an approximation at the origin in the complex plane. However, if the system has multiple time-scale effects, other approximations can be obtained at different locations on the negative real axis to emphasi... 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