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Automatic Control, IEEE Transactions on

Issue 3 • Date June 1982

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Displaying Results 1 - 25 of 51
  • [Front cover]

    Publication Year: 1982 , Page(s): 0
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    Freely Available from IEEE
  • Editorial: Outstanding AC transactions paper awards

    Publication Year: 1982 , Page(s): 521
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    Freely Available from IEEE
  • Comments on "Decentralization, stabilization, and estimation of large scale linear systems"

    Publication Year: 1982 , Page(s): 747 - 748
    Cited by:  Papers (3)
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    It is shown here that the input decentralization scheme for the large scale linear system presented by Siljak and Vukcevic does not always result in interconnected subsystems controlled by local (scalar) inputs. View full abstract»

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  • Author's reply

    Publication Year: 1982 , Page(s): 748
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  • Correction to "Homogeneous interconnected systems: An example"

    Publication Year: 1982 , Page(s): 748
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  • [Back cover]

    Publication Year: 1982 , Page(s): 0
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    Freely Available from IEEE
  • Trends in large space structure control theory: Fondest hopes, wildest dreams

    Publication Year: 1982 , Page(s): 522 - 535
    Cited by:  Papers (124)  |  Patents (1)
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    This paper presents a mathematical framework for discussion of large space structure (LSS) control theory. Within this framework, current trends in LSS control theory and related topics in general control science are surveyed. View full abstract»

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  • Gradient computation in prediction error identification of linear discrete-time systems

    Publication Year: 1982 , Page(s): 738 - 739
    Cited by:  Papers (2)
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    A dynamic programming formulation is used to derive efficient expressions for the gradient of the identification criterion with respect to the parameters of a linear time-invariant system. These expressions reduce the computational costs of the parameter optimization step in prediction error identification. View full abstract»

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  • Qualitative analysis of large scale dynamical systems

    Publication Year: 1982 , Page(s): 749
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  • On the selection of the eigenvalues to be retained in the reduced order models

    Publication Year: 1982 , Page(s): 688 - 690
    Cited by:  Papers (2)
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    This note points out that the model order selection criteria proposed earlier for Davison's and Marshall's reduced order models are not applicable in many of the practical cases. A new criterion is proposed to overcome the deficiencies of the earlier methods. View full abstract»

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  • Electrostatically figured reflecting membrane antennas for satellites

    Publication Year: 1982 , Page(s): 666 - 670
    Cited by:  Papers (14)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (568 KB)  

    A design concept is described which may permit the construction of very large high-precision low-mass reflecting antennas for use in space. The concept utilizes electrostatic forces to actively shape a flexible membrane reflector, a method which appears to substantially reduce the number of reflector figure actuators required to achieve a specified reflector surface precision. The concept presents a challenging control problem, however, because the equilibrium reflector figure may exhibit several open-loop Rayleigh-Taylor modal instabilities. The origin and essential elements of this control problem are described and a control approach is proposed. A laboratory demonstration of three successfully stabilized modes on a meter-square membrane is also described which suggests that electrostatically figured satellite antennas with diameters reaching several hundred meters, and ratios of focal length to diameter as small as one, could achieve beamwidths of several arc seconds. View full abstract»

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  • Martingale convergence analysis of adaptive schemes--A feedback approach

    Publication Year: 1982 , Page(s): 716 - 719
    Cited by:  Papers (1)
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    An equivalent stochastic feedback system can be associated to many recursive identification and adaptive control schemes. This equivalent feedback system has a certain structure which can be used for selecting appropriate near supermartingales allowing us to establish a.s. convergence. A basic convergence result is presented which can be used in the analysis of various adaptive schemes. View full abstract»

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  • On stabilization by local state feedback for discrete-time large-scale systems with delays in interconnections

    Publication Year: 1982 , Page(s): 744 - 746
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (296 KB)  

    By employing an extended Nyquist array technique, a sufficient condition is obtained for decentralized stabilization of a class of discrete-time large-scale systems with delays in interconnections. View full abstract»

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  • Decentralized dynamic control of a multiaccess broadcast channel

    Publication Year: 1982 , Page(s): 559 - 569
    Cited by:  Papers (108)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1120 KB)  

    Retransmission policies are presented for the decentralized control of a multiaccess packet-switched broadcast channel. The policies have a simple recursive form yielding a Markov description of the system. Finite average delay is achieved for an infinite-population Poisson arrival model for any rate \lambda < e^{-1} . It is proposed that the goal of retransmission policies should be to maintain the traffic intensity at a nearly constant, optimum level. The policies we introduce achieve this goal by nearly decoupling the dynamics of the traffic intensity from the backlog fluctuations. Analysis and simulations show that the policies perform well, even when the channel feedback information is unreliable or incomplete. View full abstract»

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  • On satisfying strict positive real condition for convergence by overparameterization

    Publication Year: 1982 , Page(s): 715 - 716
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (240 KB)  

    Strict positive real (SPR) conditions for global convergence of stochastic adaptive control and recursive identification schemes have appeared in a number of analyses using different approaches. It is shown that this strict positive real condition on the unknown operator associated with the plant can be removed in every case by a sufficient overparameterization of the parameter vector. View full abstract»

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  • Wiener-like fourier kernels for nonlinear system identification and synthesis (nonanalytic cascade, bilinear, and feedback cases)

    Publication Year: 1982 , Page(s): 677 - 685
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (728 KB)  

    Nonlinear systems subjected to Gaussian inputs are studied based on the Wiener-like stochastic functional Fourier series [1]. Analytic and nonanalytic cascade, bilinear, and feedback nonlinear structures are considered and their n th-order Fourier-Hermite kernels are calculated analytically. The characteristic kernel features thus revealed are discussed as a guide to interpret data from multidimensional cross-correlation experiments for nonparametric nonlinear system identification. The results are shown to be useful also for the mean-square-signal analysis of nonlinear systems whose structures and parameters are known a priori. For the feedback case, a certain approximation is employed for finding the n th-order closed-loop kernel. This is a generalization of the describing function technique, and using examples, the algorithm is compared to existing procedures for random-input nonlinear servosynthesis. View full abstract»

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  • Decoupled decomposition of the Riccati equation

    Publication Year: 1982 , Page(s): 696 - 698
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    The general matrix Riccati equation is decomposed into product of two factors where the first one is determined independent of the second factor. Condition for existence of solution of the Riccati equation is given via this decomposition and the existence of solution of the self-adjoint matrix Riccati equation arising in optimal control and Kalman filtering is directly established from that condition. View full abstract»

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  • Geometric properties and invariant manifolds of the Riccati equation

    Publication Year: 1982 , Page(s): 670 - 677
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (848 KB)  

    This short paper considers the general Riccati matrix differential equation. It reviews and extends results on the characterization and existence of equilibrium solutions, establishes that the Riccati equation has at most one stable equilibrium solution as t \rightarrow \infty or t \rightarrow -\infty , and confines the region of attraction to this unique stable equilibrium solution by identifying and utilizing linear and nonlinear invariant manifolds of the Riccati equation. View full abstract»

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  • Direct adaptive pole placement with application to nonminimum phase systems

    Publication Year: 1982 , Page(s): 720 - 722
    Cited by:  Papers (39)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (328 KB)  

    This note presents the first direct adaptive control structure for nonminimum phase systems where controller parameter identification can be posed as a standard linear parameter estimation problem. In particular, a linear equation error model is formulated for estimating both the controller parameters and some additional auxiliary parameters. The key idea involves insertion of the Bezout polynomial identity into the polynomial design equation which arises in arbitrary pole placement. View full abstract»

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  • On eigenstructure assignment in linear multivariable systems

    Publication Year: 1982 , Page(s): 690 - 693
    Cited by:  Papers (35)
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    The eigenvalue-assignment approach of Brogan [1], [2] is generalized and extended to the assignment of the entire closed-loop eigenstructure of linear multivariable systems. The set of assignable eigenvectors and generalized eigenvectors emerges naturally in the solution and is given, moreover, in an explicit parametric form. Two numerical examples are worked out to demonstrate the application of the procedure. View full abstract»

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  • A note on the stability of linear discrete systems and lyapunov method

    Publication Year: 1982 , Page(s): 707 - 708
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (168 KB)  

    In a publication by Y. P. Harn and C. T. Chen [1] a proof of a discrete stability test by using the Lyapunov method was given. In this note the main results obtained by the author in this direction in 1965 [6], [7] and the extensions and applications obtained partially with other authors since then and published in different journals [8]-[10] are surveyed. The similarity to the results in [1] is obvious. View full abstract»

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  • The control of angular momentum for asymmetric rigid bodies

    Publication Year: 1982 , Page(s): 686 - 688
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (264 KB)  

    A linear feedback law is obtained in closed form for the regulation of the angular momentum of an arbitrary rotating rigid body, without linearizing hypotheses of symmetry, yet optimal for a suitable quadratic energy cost. The evolution of the amplitude of the controlled angular momentum is thereby obtained in closed form, whence asymptotic closed-loop stability and exact open-loop terminal rate nulling are derived. Earlier steady-state results are recovered as particular cases. View full abstract»

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  • On the relation between stable matrix fraction factorizations and regulable realizations of linear systems over rings

    Publication Year: 1982 , Page(s): 627 - 638
    Cited by:  Papers (38)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1280 KB)  

    Various types of transfer matrix factorizations are of interest when designing regulators for generalized types of linear systems (delay differential, 2-D, and families of systems). This paper studies the existence of stable and of stable proper factorizations, in the context of the theory of systems over rings. Factorability is related to stabilizability and detectability properties of realizations of the transfer matrix. View full abstract»

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  • A note on modeling error of linear stochastic systems with a white coefficient

    Publication Year: 1982 , Page(s): 733 - 736
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (328 KB)  

    Consider a linear stochastic system with a white coefficient under a quadratic cost. Conditions are given that guarantee the superiority of the optimal controller designed on a model with an erroneous variance of the coefficient over the certainty equivalence controller and the existence of the actual cost for infinite horizon. View full abstract»

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  • Planar regions of attraction

    Publication Year: 1982 , Page(s): 708 - 710
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (304 KB)  

    An effective method for estimation of the region of attraction of an equilibrium point in the plane is proposed in this note. This new method for stability analysis of the second-order nonlinear system \dot{x} = f(x) ; x(t_{0})=x_{0} , is based on the properties of phase flows and associated velocity fields. Several engineering examples have been solved which illustrate the usefulness of the technique. 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