IEEE Transactions on Automatic Control

Issue 3 • Mar 2002

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Displaying Results 1 - 20 of 20
  • An adaptive compensator for a class of linearly parameterized systems

    Publication Year: 2002, Page(s):483 - 486
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (257 KB) | HTML iconHTML

    A compensation design for a class of linearly parameterized systems is presented. The compensator consists of a typical linearizing control and an adaptive observer for online estimation of the system's parameters. The proposed method achieves the asymptotic stability of the tracking and estimation error dynamics, provided the basis functions in the regressor vector are linearly independent in ter... View full abstract»

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  • Stability analysis and observer design for neutral delay systems

    Publication Year: 2002, Page(s):478 - 483
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (313 KB) | HTML iconHTML

    This paper deals with the observer design problem for a class of linear delay systems of the neutral-type. The problem addressed is that of designing a full-order observer that guarantees the exponential stability of the error dynamic system. An effective algebraic matrix equation approach is developed to solve this problem. In particular, both the observer analysis and design problems are investi... View full abstract»

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  • A Lyapunov approach to incremental stability properties

    Publication Year: 2002, Page(s):410 - 421
    Cited by:  Papers (263)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB) | HTML iconHTML

    Deals with several notions of incremental stability. In other words, the focus is on stability of trajectories with respect to one another, rather than with respect to some attractor. The aim is to present a framework for understanding such questions fully compatible with the well-known input-to-state stability approach. Applications of the newly introduced stability notions are also discussed View full abstract»

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  • On matching conditions for adaptive state tracking control of systems with actuator failures

    Publication Year: 2002, Page(s):473 - 478
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (334 KB) | HTML iconHTML

    In this paper, new necessary and sufficient conditions are derived for actuator failure compensation for linear time-invariant systems with actuator failures characterized by unknown input signals at some unknown fixed values and time instants, for state tracking with state feedback. It is shown that the number of fully functional actuators is crucial in determining the actuation range, which spec... View full abstract»

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  • Local convex directions for Hurwitz stable polynomials

    Publication Year: 2002, Page(s):532 - 537
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (331 KB) | HTML iconHTML

    A condition for a polynomial p(s) to be a local convex direction for a Hurwitz stable polynomial q(s) is derived. The condition is in terms of polynomials associated with the even and odd parts of p(s) and q ( s), and constitutes a generalization of Rantzer's phase-growth condition for global convex directions. It is used to determine convex directions for certain subsets of Hurwitz stable polynom... View full abstract»

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  • Lyapunov-based switching supervisory control of nonlinear uncertain systems

    Publication Year: 2002, Page(s):500 - 505
    Cited by:  Papers (73)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (366 KB) | HTML iconHTML

    The problem of controlling nonlinear noisy systems affected by parametric uncertainties is approached via the introduction of a supervisor which switches on, in feedback to the plant, one controller selected from a finite set of predesigned controllers. A Lyapunov-based falsification criterion allows one to ensure robust stability in the presence of uncertain constant parameters and exogenous boun... View full abstract»

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  • Model abstraction and inclusion principle: a comparison

    Publication Year: 2002, Page(s):529 - 532
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB) | HTML iconHTML

    This paper discusses connections between the inclusion principle and model abstraction in large-scale hierarchical control systems. It also provides conditions for implementation of controllability and observability in linear continuous-time dynamic systems satisfying either aggregation or restriction conditions, as well as for observability implementation in linear continuous-time dynamic systems... View full abstract»

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  • Remarks on validation of uncertainty models using frequency response data

    Publication Year: 2002, Page(s):486 - 490
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (305 KB) | HTML iconHTML

    Uncertainty validation using frequency response data has been studied by several authors. If the uncertainty is assumed to be stable, then the problem amounts to one of boundary interpolation. It is shown in this paper that for more general uncertainty models, an additional constraint is needed in order for the results of Boulet et al. (1998) and Chen (1997) to be applicable. Boundary interpolatio... View full abstract»

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  • Optimal routing control: repeated game approach

    Publication Year: 2002, Page(s):437 - 450
    Cited by:  Papers (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (394 KB) | HTML iconHTML

    Communication networks shared by selfish users are considered and modeled as noncooperative repeated games. Each user is interested only in optimizing its own performance by controlling the routing of its load. We investigate the existence of a Nash equilibrium point (NEP) that achieves the system-wide optimum cost. The existence of a subgame-perfect NEP that not only achieves the system-wide opti... View full abstract»

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  • Stable inversion of continuous-time nonlinear systems by finite-difference methods

    Publication Year: 2002, Page(s):537 - 542
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (323 KB) | HTML iconHTML

    Introduces finite-difference methods for stable inversion of continuous-time nonlinear systems. A relationship between the new finite-difference methods and the existing Picard methods is established. A damped Newton finite-difference method is shown to possess superior convergence properties, and its effectiveness is illustrated with an inverted pendulum example View full abstract»

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  • An adaptive actuator failure compensation controller using output feedback

    Publication Year: 2002, Page(s):506 - 511
    Cited by:  Papers (147)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (335 KB) | HTML iconHTML

    An adaptive control scheme using output feedback for output tracking is developed for systems with unknown actuator failures. Such actuator failures are characterized by some unknown inputs stuck at some unknown fixed values at unknown time instants. An effective output feedback controller structure is proposed for actuator failure compensation. When implemented with true matching parameters, the ... View full abstract»

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  • Homogeneous dynamical systems theory

    Publication Year: 2002, Page(s):462 - 472
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB) | HTML iconHTML

    We study controlled homogeneous dynamical systems and derive conditions under which the system is perspective controllable. We also derive conditions under which the system is observable in the presence of a control over the complex base field. In the absence of any control input, we derive a necessary and sufficient condition for observability of a homogeneous dynamical system over the real base ... View full abstract»

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  • Mean-square small gain theorem for stochastic control: discrete-time case

    Publication Year: 2002, Page(s):490 - 494
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB) | HTML iconHTML

    This paper presents a small gain theorem in the mean square sense for multiple (interconnected) linear systems with multiplicative noises. The small-gain theorem is proposed in terms of the spectral radius of a matrix, whose elements are the squares of H2 norms of the involved transfer functions. Both robust stability and performance conditions are characterized by the new small-gain th... View full abstract»

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  • Output-input stability and minimum-phase nonlinear systems

    Publication Year: 2002, Page(s):422 - 436
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (507 KB) | HTML iconHTML

    This paper introduces and studies the notion of output-input stability, which represents a variant of the minimum-phase property for general smooth nonlinear control systems. The definition of output-input stability does not rely on a particular choice of coordinates in which the system takes a normal form or on the computation of zero dynamics. In the spirit of the "input-to-state stability" phil... View full abstract»

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  • Overlapping decompositions and expansions of Petri nets

    Publication Year: 2002, Page(s):511 - 515
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (266 KB) | HTML iconHTML

    Overlapping decompositions and expansions are considered to design decentralized controllers for discrete-event systems (DESs) modeled by Petri nets. The inclusion principle for Petri nets is first defined. It is shown that properties like boundedness, reversibility, and liveness (with a mild additional condition) carry over from the including net to the included net. Moreover, a new property call... View full abstract»

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  • Robustness and risk-sensitive filtering

    Publication Year: 2002, Page(s):451 - 461
    Cited by:  Papers (60)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (438 KB) | HTML iconHTML

    This paper gives a precise meaning to the robustness of risk-sensitive filters for problems in which one is uncertain as to the exact value of the probability model. It is shown that risk-sensitive estimators (including filters) enjoy an error bound which is the sum of two terms, the first of which coincides with an upper bound on the error that one would obtain if one knew exactly the underlying ... View full abstract»

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  • Tracking and regulation control of an underactuated surface vessel with nonintegrable dynamics

    Publication Year: 2002, Page(s):495 - 500
    Cited by:  Papers (113)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (313 KB) | HTML iconHTML

    A continuous, time-varying tracking controller is designed that globally exponentially forces the position/orientation tracking error of an underactuated surface vessel to a neighborhood about zero that can be made arbitrarily small i.e. global uniformly ultimately boundedness (GUUB). The result is facilitated by fusing a filtered tracking error transformation with a dynamic oscillator design. We ... View full abstract»

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  • Stability of discrete-time linear systems with Markovian jumping parameters and constrained control

    Publication Year: 2002, Page(s):516 - 521
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (325 KB) | HTML iconHTML

    The note is devoted to the study of linear discrete-time systems with Markovian jumping parameters and constrained control. The constraints used in the note are of symmetrical inequality type. The approach of positively invariant sets is used to obtain new necessary and sufficient conditions for positive invariance, and sufficient conditions for stochastic stability. These conditions become those ... View full abstract»

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  • Trading the stability of finite zeros for global stabilization of nonlinear cascade systems

    Publication Year: 2002, Page(s):521 - 525
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (315 KB) | HTML iconHTML

    Analyzes the stabilizability properties of nonlinear cascades in which a nonminimum phase linear system is interconnected through its output to a stable nonlinear system. It is shown that the instability of the zeros of the linear system can be traded with the stability of the nonlinear system up to a limit fixed by the growth properties of the cascade interconnection term. Below this limit, globa... View full abstract»

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  • Adaptive observer for multiple-input-multiple-output (MIMO) linear time-varying systems

    Publication Year: 2002, Page(s):525 - 529
    Cited by:  Papers (228)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (290 KB) | HTML iconHTML

    For joint state-parameter estimation in linear time-varying (LTV) multiple-input-multiple-output (MIMO) systems, an approach to the design of adaptive observers is proposed. It is conceptually simple and computationally efficient. Its global exponential convergence is established for noise-free systems. In the presence of noises, it is proved that the estimation errors are bounded and converge in ... 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