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IEEE Transactions on Automatic Control

Issue 12 • Date Dec. 1997

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Displaying Results 1 - 21 of 21
  • Comments on "Quadratic stabilization of continuous time systems with state-delay and norm-bounded time-varying uncertainties"

    Publication Year: 1997, Page(s):1740 - 1742
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (106 KB)

    In the above mentioned paper by Mahmoud-Muthairi (ibid. vol.39 (1994)) a sufficient condition for memoryless stabilization of a class of uncertain linear systems with a variable-state delay and norm-bounded time-varying uncertainties is derived in terms of an algebraic Riccati equation. This Riccati equation depends on several free matrix variables, and a subsequent result in the paper, Theorem 2,... View full abstract»

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  • 1997 Index IEEE Transactions on Automatic Control Vol. 42

    Publication Year: 1997, Page(s):1 - 24
    Request permission for commercial reuse | PDF file iconPDF (992 KB)
    Freely Available from IEEE
  • Robustness analysis and synthesis for nonlinear uncertain systems

    Publication Year: 1997, Page(s):1654 - 1662
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    A state-space characterization of robustness analysis and synthesis for nonlinear uncertain systems is proposed. The robustness of a class of nonlinear systems subject to L2-bounded structured uncertainties is characterized in terms of a nonlinear matrix inequality (NLMI), which yields a convex feasibility problem. As in the linear case, scalings are used to find a Lyapunov or storage f... View full abstract»

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  • Some qualitative properties of sampled-data control systems

    Publication Year: 1997, Page(s):1721 - 1725
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    The authors consider sampled-data control systems which consist of an interconnection of a continuous-time nonlinear plant and a digital controller which has quantizers (but is otherwise linear), along with the required interface elements (A/D and D/A converters). In the present paper the authors study the qualitative effects of the quantizers and the plant nonlinearities of these systems View full abstract»

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  • Nonlinear H control: a J-dissipative approach

    Publication Year: 1997, Page(s):1636 - 1653
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    This paper applies the chain-scattering approach for linear H control to input affine nonlinear plants with general output structure. The nonlinear H-control problem is reformulated in terms of the chain representation of a given plant. The state-space characterization of J-dissipative (J-lossless) systems together with two special types of coprime factorization... View full abstract»

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  • On a common quadratic Lyapunov function for widely distant systems

    Publication Year: 1997, Page(s):1697 - 1699
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    A sufficient condition concerning the construction of a common quadratic Lyapunov function for widely distant linear systems is presented. The condition is set on a mutual relation matrix whose size is just equal to the number of the coefficient matrices View full abstract»

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  • Frequency domain system identification using arbitrary signals

    Publication Year: 1997, Page(s):1717 - 1720
    Cited by:  Papers (85)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    It is the common conviction that frequency domain system identification suffers from the drawback that it cannot handle arbitrary signals without introducing systematic errors. This paper shows that it is possible to deal with nonperiodic signals without any approximation and under the same assumptions as in the time domain, by estimating simultaneously some initial conditions and the system model... View full abstract»

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  • Identification in the presence of classes of unmodeled dynamics and noise

    Publication Year: 1997, Page(s):1620 - 1635
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    Identification involves obtaining a model from an a priori chosen model class(es) using finite corrupted data. The corruption may be due to several reasons ranging from noise to unmodeled dynamics, since the real system may not belong to the model class. Two popular approaches-probabilistic and set-membership identification-deal with this problem by imposing temporal constraints on the noise sampl... View full abstract»

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  • Asymptotic behavior analysis of a coupled time-varying system: application to adaptive systems

    Publication Year: 1997, Page(s):1693 - 1697
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    Asymptotic behavior of a partial state of a coupled ordinary and/or partial differential equation is investigated. It is specifically shown that if a signal x(t) is a solution to a dynamic system existing for all t⩾0 in an abstract Banach space and pth (p⩾1) power integrable, then x(t)→0 as t→∞. The system is allowed to be nonautonomous and assumes the existence of a Lyapun... View full abstract»

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  • An algorithm to find the smallest possible values in a matrix to satisfy the M-matrix condition

    Publication Year: 1997, Page(s):1738 - 1740
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    M-matrix is an important tool for the construction of vector Lyapunov functions for linear and nonlinear large-scale systems. It is also widely used in the conditions related to decentralized control of large-scale systems. An algorithm and its intended application to large-scale system decentralized controller designs are presented in this paper View full abstract»

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  • Adaptive output feedback regulation of a class of nonlinear systems: convergence and robustness

    Publication Year: 1997, Page(s):1714 - 1716
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    In this paper we consider a minimum-phase, input-output linearizable system that is represented globally by an nth-order differential equation. The nonlinearities of the system depend linearly on unknown parameters which belong to a known convex set. We design a semiglobal adaptive output feedback controller to ensure boundedness of all state variables and regulation of the output to zero (an open... View full abstract»

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  • The policy iteration algorithm for average reward Markov decision processes with general state space

    Publication Year: 1997, Page(s):1663 - 1680
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    The average cost optimal control problem is addressed for Markov decision processes with unbounded cost. It is found that the policy iteration algorithm generates a sequence of policies which are c-regular, where c is the cost function under consideration. This result only requires the existence of an initial c-regular policy and an irreducibility condition on the state space. Furthermore, under t... View full abstract»

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  • Auto-tuning of parameters in estimation and adaptive control of robots with weaker PE conditions

    Publication Year: 1997, Page(s):1726 - 1730
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    Knowledge of the system parameters is necessary for optimum performance of the system. A new class of parameter estimation and adaptive control algorithms was shown by Ahmad (1995), which was applied to the robotic system. These algorithms require relaxed conditions of persistent excitation for parameter convergence. Here we propose an enhancement of these algorithms via improved initialization re... View full abstract»

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  • Switching observer design for uncertain nonlinear systems

    Publication Year: 1997, Page(s):1699 - 1703
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    The problem of designing a switching observer for a finite or infinite set of nonlinear time-varying systems with unknown parameters and/or varying structure is studied in this paper. Under a compactness condition and a Lyapunov detectability assumption, it is shown that a switching observer with asymptotically stable error dynamics can be constructed. Different from the variable structure control... View full abstract»

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  • ODE analysis and redesign in blind adaptation

    Publication Year: 1997, Page(s):1742 - 1747
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    In blind adaptation the dynamics of an unknown channel (system) is recovered together with the transmitted symbol sequence (input signal). This paper generalizes the author's previous algorithm (1994, 1997), that is not derived by criterion minimization, to include adaptive regressor filtering. The resulting scheme, which adapts a finite-dimensional IIR channel model, is designed to converge only ... View full abstract»

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  • Robustness of zero shifting via generalized sampled-data hold functions

    Publication Year: 1997, Page(s):1681 - 1692
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    In this paper we study robustness and sensitivity properties of a sampled-data feedback system with a generalized sampled-data hold function (GSHF). We argue that shifting non-minimum phase zeros using GSHF control can lead to difficulties unless the zero is outside the closed-loop bandwidth View full abstract»

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  • Robust performance: unknown disturbances and known fixed inputs

    Publication Year: 1997, Page(s):1730 - 1734
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    This paper addresses the robust performance problem when the system under consideration is subjected to norm bounded time-varying uncertainty. Different performance objectives are considered, and computable bounds are obtained for the worst case performance in various norms. In some important cases, it is shown that these bounds are tight, giving simple exact formulas for computing robust performa... View full abstract»

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  • Optimal scheduling with deadline constraints in tree networks

    Publication Year: 1997, Page(s):1703 - 1705
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (72 KB)

    The problem of scheduling time-critical messages over a tree network is considered. Messages arrive at any of the nodes and have to reach the root node before their deadlines expire, else they are considered lost. The network is assumed to be operating in discrete time and the messages need one time unit for transmission from one node to the next along its path. The arrival and deadline processes ... View full abstract»

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  • A remark on the problem of semiglobal nonlinear output regulation

    Publication Year: 1997, Page(s):1734 - 1738
    Cited by:  Papers (79)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    This paper shows how the method for semiglobal stabilization by output feedback, based on high-gain observer and saturation, and the method for structurally stable regulation, based on system immersion, can be effectively coupled in order to solve problems of robust output regulation in the presence of parameter uncertainties ranging over compact sets View full abstract»

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  • On deadlock-free modular supervisory control of discrete-event systems

    Publication Year: 1997, Page(s):1705 - 1708
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    In this paper the problem of synthesizing deadlock-free modular supervisors for discrete-event systems is discussed. By introducing the d-invariant relation between a pair of supervisors, it is shown that when the control objective is described in terms of intersection of two languages, a necessary and sufficient condition for the modular supervisor to be deadlock-free is that this pair of subsupe... View full abstract»

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  • Adaptive control of a constrained robot - ensuring zero tracking and zero force errors

    Publication Year: 1997, Page(s):1709 - 1714
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    A constrained robot is a mathematical model that describes the interaction between a robot and the environment as the robot moves along a prescribed trajectory. The main difficulty in the control of constrained robots is to ensure zero error for the constraint force in addition to accurate trajectory tracking. This study extends the result of Slotine and Li (1991) to design a simple adaptive contr... View full abstract»

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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