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IEEE Transactions on Automatic Control

Issue 7 • July 2004

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Displaying Results 1 - 25 of 36
  • Table of contents

    Publication Year: 2004, Page(s):c1 - c4
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  • IEEE Transactions on Automatic Control publication information

    Publication Year: 2004, Page(s): c2
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  • Scanning the issue

    Publication Year: 2004, Page(s): 1045
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  • Robust M-ary detection filters and smoothers for continuous-time jump Markov systems

    Publication Year: 2004, Page(s):1046 - 1055
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB) | HTML iconHTML

    In this paper, we consider a dynamic M-ary detection problem when Markov chains are observed through a Wiener process. These systems are fully specified by a candidate set of parameters, whose elements are, a rate matrix for the Markov chain and a parameter for the observation model. Further, we suppose these parameter sets can switch according to the state of an unobserved Markov chain and thereb... View full abstract»

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  • Control under communication constraints

    Publication Year: 2004, Page(s):1056 - 1068
    Cited by:  Papers (655)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB) | HTML iconHTML

    There is an increasing interest in studying control systems employing multiple sensors and actuators that are geographically distributed. Communication is an important component of these distributed and networked control systems. Hence, there is a need to understand the interactions between the control components and the communication components of the distributed system. In this paper, we formula... View full abstract»

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  • Homogeneous observers, iterative design, and global stabilization of high-order nonlinear systems by smooth output feedback

    Publication Year: 2004, Page(s):1069 - 1080
    Cited by:  Papers (64)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB) | HTML iconHTML

    We study the problem of global stabilization by smooth output feedback, for a class of n-dimensional homogeneous systems whose Jacobian linearization is neither controllable nor observable. A new output feedback control scheme is proposed for the explicit design of both homogeneous observers and controllers. While the smooth state feedback control law is constructed based on the tool of adding a p... View full abstract»

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  • Further results on robustness of (possibly discontinuous) sample and hold feedback

    Publication Year: 2004, Page(s):1081 - 1089
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB) | HTML iconHTML

    We demonstrate that sample and hold state feedback control (possibly discontinuous with respect to the state) is robust when the closed loop system possesses an appropriate Lyapunov function. We first show that if a Lyapunov decrease over sampling periods exists for the nominal system, this decrease can be maintained with some degradation relative to a sufficiently small additive perturbation. We ... View full abstract»

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  • Satisficing: a new approach to constructive nonlinear control

    Publication Year: 2004, Page(s):1090 - 1102
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB) | HTML iconHTML

    The main contribution of this paper is a constructive parameterization of the class of almost smooth universal formulas which render a system asymptotically stable with respect to a known control Lyapunov function (CLF), and a constructive parameterization of a class of inverse optimal universal formulas having Kalman-like stability margins. The novelty of the parameterization is that it is given ... View full abstract»

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  • A framework for stabilization of nonlinear sampled-data systems based on their approximate discrete-time models

    Publication Year: 2004, Page(s):1103 - 1122
    Cited by:  Papers (230)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB) | HTML iconHTML

    A unified framework for design of stabilizing controllers for sampled-data differential inclusions via their approximate discrete-time models is presented. Both fixed and fast sampling are considered. In each case, sufficient conditions are presented which guarantee that the controller that stabilizes a family of approximate discrete-time plant models also stabilizes the exact discrete-time plant ... View full abstract»

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  • Asymptotical statistics of misspecified hidden Markov models

    Publication Year: 2004, Page(s):1123 - 1132
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    This paper deals with the problem of modeling data generated by an ergodic stochastic process as the output of a hidden Markov model (HMM). More specifically, we consider the problem of fitting a parametric family of HMM with continuous output to an ergodic stochastic process with continuous values, which does not necessarily belong to the family. In this context, we derive the main asymptotic res... View full abstract»

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  • Stabilizability and insensitivity of switched linear systems

    Publication Year: 2004, Page(s):1133 - 1137
    Cited by:  Papers (47)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB) | HTML iconHTML

    This note identifies two types of stabilizability for switched systems: the pointwise stabilizability and the consistent stabilizability. Necessary conditions and sufficient conditions for both types are presented for switched linear systems. Insensitivity issues are briefly addressed as well. View full abstract»

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  • Unified convergence proofs of continuous-time fictitious play

    Publication Year: 2004, Page(s):1137 - 1141
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB) | HTML iconHTML

    We consider a continuous-time version of fictitious play (FP), in which interacting players evolve their strategies in reaction to their opponents' actions without knowledge of their opponents' utilities. It is known that FP need not converge, but that convergence is possible in certain special cases including zero-sum games, identical interest games, and two-player/two-move games. We provide a un... View full abstract»

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  • The effect of regularization on variance error

    Publication Year: 2004, Page(s):1142 - 1147
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB) | HTML iconHTML

    This note addresses the problem of quantifying the effect of noise induced error(so called "variance error") in system estimates found via a regularised cost criterion. It builds on recent work by the authors in which expressions for nonregularised criterions are derived which are exact for finite model order. Those new expressions were established to be very different to previous quantifications ... View full abstract»

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  • Simultaneous tracking and stabilization of mobile robots: an adaptive approach

    Publication Year: 2004, Page(s):1147 - 1151
    Cited by:  Papers (81)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB) | HTML iconHTML

    This note presents a time-varying global adaptive controller at the torque level that simultaneously solves both tracking and stabilization for mobile robots with unknown kinematic and dynamic parameters. The controller synthesis is based on Lyapunov's direct method and backstepping technique. Simulations illustrate the effectiveness of the proposed controller. View full abstract»

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  • Multivariable adaptive control using high-frequency gain matrix factorization

    Publication Year: 2004, Page(s):1152 - 1156
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    In this note, we extend the application of a less restrictive condition about the high-frequency gain matrix to design stable direct model reference adaptive control for a class of multivariable plants with relative degree greater than one. The new approach is based on a control parametrization derived from a factorization of the high-frequency gain matrix Kp in the form of a product of... View full abstract»

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  • Dynamic admission control in a call center with one shared and two dedicated service facilities

    Publication Year: 2004, Page(s):1157 - 1161
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB) | HTML iconHTML

    Admission control of a call center is addressed through a Markovian loss system with two classes of calls and three stations, one dedicated for each class, and one shared station. Each class is identified by different revenues, service and arrival rates. We show that serving a call in its dedicated station, whenever possible, is optimal. For the shared station, we establish the existence of optima... View full abstract»

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  • Properties of the composite quadratic Lyapunov functions

    Publication Year: 2004, Page(s):1162 - 1167
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB) | HTML iconHTML

    A composite quadratic Lyapunov function introduced recently was shown to be very useful in the study of set invariance properties for linear systems with input and state constraints and for systems with a class of convex/concave nonlinearities. In this note, more properties about this function are revealed. In particular, we study the continuity of the optimal parameter involved in this function. ... View full abstract»

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  • Existence of Carathe´odory solutions in nonlinear systems with discontinuous switching feedback controllers

    Publication Year: 2004, Page(s):1167 - 1171
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB) | HTML iconHTML

    In this note, we consider the existence of a Carathe´odory solution in a single-input-single-output nonlinear system with a discontinuous switching feedback controller. The main contribution is to show that if the nonlinear system can be transformed into a global normal form, then we can specify the value of the discontinuous switching feedback controller on the switching hypersurface so tha... View full abstract»

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  • Efficient scheduled stabilizing output feedback model predictive control for constrained nonlinear systems

    Publication Year: 2004, Page(s):1172 - 1177
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB) | HTML iconHTML

    In this note, we present a computationally efficient scheduled output feedback model predictive control (MPC) algorithm for constrained nonlinear systems with large operating regions. We design a set of local output feedback predictive controllers with their estimated regions of stability covering the desired operating region, and implement them as a single scheduled output feedback MPC which on-l... View full abstract»

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  • On optimal LTI approximation of nonlinear systems

    Publication Year: 2004, Page(s):1178 - 1182
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB) | HTML iconHTML

    Optimal linear time-invariant (LTI) approximation of discrete-time nonlinear systems is studied using a quasi-stationary signal description. The optimality of the LTI approximation is quantified as a least average squared error condition, reminescent of recent studies on the performance of least squares type identification methods for LTI models of nonlinear systems. View full abstract»

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  • Input independent chaos synchronization of switched systems

    Publication Year: 2004, Page(s):1182 - 1186
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    Input independent chaos synchronization of switched systems is addressed. The synchronization is carried out by designing an observer which involves a switched matrix gain. A special structure of this gain enables both an input independence of the state reconstruction error equation and a global convergence of this equation. Input independence is ensured by a suitable partial pole placement while ... View full abstract»

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  • On H model reduction using LMIs

    Publication Year: 2004, Page(s):1187 - 1191
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    In this note, we deal with the problem of approximating a given nth-order linear time-invariant system G by an rth-order system Gr where r∞ norm of the associated error system can be analyzed by using linear matrix ineqaulity (LMI)-related techniques. These lower bounds are given in terms of the Hankel singular values of the sys... View full abstract»

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  • An LMI approach to stability of systems with severe time-delay

    Publication Year: 2004, Page(s):1192 - 1195
    Cited by:  Papers (145)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB) | HTML iconHTML

    This note describes the stability problems of uncertain systems with arbitrarily time-varying and severe time-delay. Using new Lyapunov-Krasovskii functionals, less conservative stability conditions are obtained for such systems. The results are illustrated using the numerical examples based on simple linear matrix inequalities. View full abstract»

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  • Control over noisy channels

    Publication Year: 2004, Page(s):1196 - 1201
    Cited by:  Papers (192)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB) | HTML iconHTML

    Communication is an important component of distributed and networked controls systems. In our companion paper, we presented a framework for studying control problems with a digital noiseless communication channel connecting the sensor to the controller. Here, we generalize that framework by applying traditional information theoretic tools of source coding and channel coding to the problem. We pres... View full abstract»

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  • The posture control of a two-link free flying acrobot with initial angular momentum

    Publication Year: 2004, Page(s):1201 - 1206
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    This note studies the posture control problem of a two-link free flying Acrobot with nonzero initial angular momentum, where the control objective is to design an acceleration based control law such that the robot can pass through a desired posture at a given time. Based on the previous results, this posture control problem can be tackled by solving the problem of stabilizing the origin of a syste... 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