IEEE Transactions on Automatic Control

Issue 6 • June 1997

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Displaying Results 1 - 20 of 20
  • Hierarchical Decision Making In Stochastic Manufacturing Systems [Book Review]

    Publication Year: 1997, Page(s):890 - 891
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    Freely Available from IEEE
  • Frequency-domain tests for validation of linear fractional uncertain models

    Publication Year: 1997, Page(s):748 - 760
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    A frequency domain approach is adopted in this paper to tackle the problem of validating uncertainty models described by linear fractional transforms. This problem amounts to verifying the consistency of certain given mathematical models to experimental information obtained from a physical plant, using either input-output, frequency-domain measurements or frequency samples of the plant. Linear fra... View full abstract»

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  • Optimal damping of forced oscillations in discrete-time systems

    Publication Year: 1997, Page(s):786 - 802
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (828 KB)

    In this paper we consider a linear discrete-time control system affected by an additive sinusoidal disturbance with known frequencies but unknown amplitudes and phases. The problem is to damp this forced oscillation in an optimal fashion. We show that the natural solution from the point of view of optimal control is neither robust with respect to errors in the frequencies, and thus not optimal in ... View full abstract»

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  • Upper matrix bound of the solution for the discrete Riccati equation

    Publication Year: 1997, Page(s):840 - 842
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    A new upper matrix bound of the solution for the discrete algebraic matrix Riccati equation is developed. This matrix bound is then used to derive bounds on the eigenvalues, trace, and determinant of the same solution. It is shown that these eigenvalue bounds are less restrictive than previous results View full abstract»

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  • Necessary and sufficient conditions for stability of LMS

    Publication Year: 1997, Page(s):761 - 770
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Guo and Ljung (1995) established some general results on exponential stability of random linear equations, which can be applied directly to the performance analysis of a wide class of adaptive algorithms, including the basic LMS ones, without requiring stationarity, independency, and boundedness assumptions of the system signals. The current paper attempts to give a complete characterization of th... View full abstract»

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  • Linear nonquadratic optimal control

    Publication Year: 1997, Page(s):875 - 879
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    We consider the optimization of nonquadratic measures of the transient response. We present a computational implementation of dynamic programming recursions to solve finite-horizon problems. In the limit, the finite-horizon performance converges to the infinite-horizon performance. We provide conditions based on finite-horizon computations which only assure that a receding horizon implementation o... View full abstract»

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  • System analysis via integral quadratic constraints

    Publication Year: 1997, Page(s):819 - 830
    Cited by:  Papers (660)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    This paper introduces a unified approach to robustness analysis with respect to nonlinearities, time variations, and uncertain parameters. From an original idea by Yakubovich (1967), the approach has been developed under a combination of influences from the Western and Russian traditions of control theory. It is shown how a complex system can be described, using integral quadratic constraints (IQC... View full abstract»

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  • Robust control system design using random search and genetic algorithms

    Publication Year: 1997, Page(s):835 - 839
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    Random search and genetic algorithms find compensators to minimize stochastic robustness cost functions. Statistical tools are incorporated in the algorithms, allowing intelligent decisions to be based on “noisy” Monte Carlo estimates. The genetic algorithm includes clustering analysis to improve performance and is significantly better than the random search for this application. The a... View full abstract»

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  • Global numerical approach to nonlinear discrete-time control

    Publication Year: 1997, Page(s):872 - 875
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    Interval analysis is used to characterize the set of all input sequences with a given length that drive a nonlinear discrete-time state-space system from a given initial state to a given set of terminal states. No requirement other than computability (i.e. ability to be evaluated by a finite algorithm) is put on the nature of the state equations. The method is based on an algorithm for set inversi... View full abstract»

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  • A frequency domain approach to control of singular systems

    Publication Year: 1997, Page(s):885 - 889
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    In this paper, singular control systems are studied from the frequency domain point of view. The proper stable factorization of a singular system is derived. The stability of the closed-loop system consisting of a singular system and controller is addressed. Most significantly, all proper stabilizing controllers are parameterized for a given singular system View full abstract»

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  • On regulation under sampling

    Publication Year: 1997, Page(s):864 - 868
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    The paper deals with linear and nonlinear regulation under sampling. It is shown that digital solutions exist under assumptions which are closely related to the existence of robust solutions to the continuous problem. Approximated solutions are computed starting from the continuous ones View full abstract»

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  • Wheel torque proportioning, rear steering, and normal force control: a structural investigation

    Publication Year: 1997, Page(s):803 - 818
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    This paper is concerned with various analysis and design issues for a possible set of control channels which may be used to improve the maneuverability and handling of automobiles. Of the possible set of controls, the current paper is limited to variable wheel torque proportioning, rear steering, and normal force control. The analysis and design issues are studied using an extensive linear model r... View full abstract»

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  • On stability of a weighted diamond of real quasi-polynomials

    Publication Year: 1997, Page(s):831 - 835
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    This paper deals with the stability problem for a weighted diamond of real quasi-polynomials. We show that under certain conditions on the weights and coefficients in the exponents, the stability of the weighted diamond follows from the stability of eight one-parameter families (edges) of quasi-polynomials. In order to check the diamond for stability, it is sufficient to examine only eight one-par... View full abstract»

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  • The unfalsified control concept and learning

    Publication Year: 1997, Page(s):843 - 847
    Cited by:  Papers (323)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    Without a plant model or other prejudicial assumptions, a theory is developed for identifying control laws which are consistent with performance objectives and past experimental data-possibly before the control laws are ever inserted in the feedback loop. The theory complements model-based methods such as H∞-robust control theory by providing a precise characterization of how the ... View full abstract»

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  • Optimal state estimation for stochastic systems: an information theoretic approach

    Publication Year: 1997, Page(s):771 - 785
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    In this paper, we examine the problem of optimal state estimation or filtering in stochastic systems using an approach based on information theoretic measures. In this setting, the traditional minimum mean-square measure is compared with information theoretic measures, Kalman filtering theory is reexamined, and some new interpretations are offered. We show that for a linear Gaussian system, the Ka... View full abstract»

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  • Feedback realization of nonsingular precompensators for linear systems with delays

    Publication Year: 1997, Page(s):848 - 852
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    The problem of realization of dynamic precompensators for linear systems with delays by static or dynamic state feedback, and static output feedback, is considered. Necessary and sufficient conditions for the solutions are given View full abstract»

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  • On the JLQ problem with uncertainty

    Publication Year: 1997, Page(s):869 - 872
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    Trofino Neto et al. (1992) have shown that one can formulate an LQ problem in the presence of uncertainties in such a way that the state and input weighting matrices can be derived as the solution of a nonlinear optimization problem. Here it is shown that for linear systems with jumping parameters, the introduction of uncertainties in the state and input matrices can still be carried out and a con... View full abstract»

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  • On nonlinear H control under sampled measurements

    Publication Year: 1997, Page(s):880 - 885
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    This paper deals with the nonlinear H∞ control problem with sampled measurement feedback. This problem has already been studied in Suzuki et al. (1995), where, using a certainty equivalence principle, a control solution involving a state estimator with a linear injection gain is proposed. Using the same general framework, we propose a more refined estimator with a nonlinear inject... View full abstract»

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  • Minimum entropy static output-feedback control with an H-norm performance bound

    Publication Year: 1997, Page(s):853 - 858
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    The problem of designing static output-feedback controllers is considered. The controller is required to minimize the closed-loop entropy (at s=∞) and to satisfy a prescribed H∞-norm bound. The design equations consist of a modified Riccati equation and a Lyapunov equation that are coupled via a projection. These equations are solved using a homotopy algorithm. The design pr... View full abstract»

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  • Relating H2 and H-norm bounds for sampled-data systems

    Publication Year: 1997, Page(s):858 - 863
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    We relate the H∞ and H2 norms for multi-input/multi-output sampled-data feedback control systems, where a continuous-time plant is controlled by a digital compensator with hold and sampler. Upper bounds on both H2 and H∞ norms are obtained based on fundamental relations derived by two different approaches, namely the hybrid state-space approa... 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