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IEEE Transactions on Automatic Control

Issue 7 • Date July 2005

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Displaying Results 1 - 25 of 25
  • Table of contents

    Publication Year: 2005, Page(s): c1
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  • IEEE Transactions on Automatic Control publication information

    Publication Year: 2005, Page(s): c2
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  • Scanning the issue

    Publication Year: 2005, Page(s): 933
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  • Numerical approximation of invariant measures for hybrid diffusion systems

    Publication Year: 2005, Page(s):934 - 946
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB) | HTML iconHTML

    This work is concerned with numerical approximation of hybrid diffusions with regime switching modulated by continuous-time finite-state Markov chains. When using the Euler-Maruyama approximation algorithms, an important question is: Suppose the measure of the regime-switching diffusions converges to its invariant measure, will the sequence of measures of the approximation scheme converges to the ... View full abstract»

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  • A time-dependent Hamilton-Jacobi formulation of reachable sets for continuous dynamic games

    Publication Year: 2005, Page(s):947 - 957
    Cited by:  Papers (218)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB) | HTML iconHTML

    We describe and implement an algorithm for computing the set of reachable states of a continuous dynamic game. The algorithm is based on a proof that the reachable set is the zero sublevel set of the viscosity solution of a particular time-dependent Hamilton-Jacobi-Isaacs partial differential equation. While alternative techniques for computing the reachable set have been proposed, the differentia... View full abstract»

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  • A new risk-sensitive maximum principle

    Publication Year: 2005, Page(s):958 - 966
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB) | HTML iconHTML

    In this paper, a new maximum principle for the risk-sensitive control problem is established. One important feature of this result is that it applies to systems in which the diffusion term may depend on the control. Such control dependence gives rise to interesting phenomena not observed in the usual setting where control independence of the diffusion term is assumed. In particular, there is an ad... View full abstract»

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  • A comparison principle for state-constrained differential inequalities and its application to time-optimal control

    Publication Year: 2005, Page(s):967 - 983
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB) | HTML iconHTML

    In this paper, we present a comparison principle that characterizes the maximal solutions of state-constrained differential inequalities in terms of solutions of certain differential equations with discontinuous right-hand sides. For the sake of completeness, we show through some set-valued analysis that the differential equations determining the maximal solutions have the unique solutions in the ... View full abstract»

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  • Analysis and synthesis of nested feedback systems

    Publication Year: 2005, Page(s):984 - 996
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB) | HTML iconHTML

    The H-loopshaping framework is extended to the design of nested (or cascaded) feedback systems consisting of an inner and an outer loop. Three robust stability margins are defined for such systems and an inequality relating them obtained for the case when the inner loop is implemented in observer form. This motivates the introduction of two synthesis algorithms which are compared... View full abstract»

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  • Analysis and synthesis on a generalized stability region

    Publication Year: 2005, Page(s):997 - 1009
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB) | HTML iconHTML

    The generalization of the ν-gap metric to a finitely connected stability region is derived. The results hold for the class of all linear, time-invariant systems which admit a continuous coprime factorization including the nonrational case. A limited extension of the H-loopshaping synthesis procedure is obtained via conformal mapping. An example is given where enlargement of th... View full abstract»

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  • Fault diagnosis in discrete-event systems: incorporating timing information

    Publication Year: 2005, Page(s):1010 - 1015
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB) | HTML iconHTML

    A framework is introduced for fault diagnosis in timed discrete-event systems. In this approach, the required estimates for system condition are updated only when the output changes or when deadlines associated with output changes expire. Thus updates at every clock tick are not required. This in many cases results in reduction in online computing requirements and in the size of the diagnosis syst... View full abstract»

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  • A geometric characterization of feedforward forms

    Publication Year: 2005, Page(s):1016 - 1021
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    This note addresses the problem of (local) coordinates and feedback equivalence of single-input affine nonlinear systems to feedforward forms. In particular, using the notions of invariant and controlled invariant distributions we provide necessary and sufficient conditions for a general affine in control nonlinear system to be (locally) coordinates or feedback equivalent to a system in (strict) f... View full abstract»

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  • Simultaneous observation of linear systems: a state-space interpretation

    Publication Year: 2005, Page(s):1021 - 1025
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB) | HTML iconHTML

    Necessary and sufficient conditions for the existence of a simultaneous functional observer for several linear time-invariant (LTI) systems are derived using distinguishability concepts, that generalize the detectability concept for a single system. They generalize also the known results. A structure for common functional observers is proposed, and for two systems, or for several systems without i... View full abstract»

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  • Controlled symmetries and passive walking

    Publication Year: 2005, Page(s):1025 - 1031
    Cited by:  Papers (142)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    In this note, we investigate the relationship between nonlinear control and passive walking in bipedal locomotion for the general case of an n degree-of-freedom biped in three dimensional space. We introduce the notion of controlled symmetry to capture the effect of the control input on the invariance of the system Lagrangian under group action. We then show the existence of a controlled symmetry ... View full abstract»

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  • Observability quadratic normal form for discrete-time systems

    Publication Year: 2005, Page(s):1031 - 1038
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB) | HTML iconHTML

    This note deals with quadratic observability normal form for nonlinear discrete-time single-input-single-output (SISO) system. First of all, the main concept of quadratic equivalence with respect to the observability property, is introduced for discrete-time systems. Subsequently, normal form structure for discrete time system is developed for system with unobservable linear approximation in one d... View full abstract»

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  • The robustness of controllability and observability for discrete linear time-varying systems with norm-bounded uncertainty

    Publication Year: 2005, Page(s):1039 - 1043
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB) | HTML iconHTML

    Controllability and observability of discrete linear time-varying systems with norm-bounded parameter uncertainties are analyzed in this note. Like in the continuous case, we propose the sufficient conditions, which ensure controllability and observability of the uncertain system. The proposed conditions allow the evaluation of controllability and observability of the uncertain system without know... View full abstract»

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  • Optimality analysis of adaptive sampled control of hybrid systems with quadratic index

    Publication Year: 2005, Page(s):1044 - 1051
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB) | HTML iconHTML

    This note is concerned with the sampled-data based linear quadratic (LQ) adaptive control of continuous-time systems with unknown Markov jump parameters. A parameter estimator and a control design method are given. It is shown that when the sample step size is small, the sampled-data based adaptive control is suboptimal under LQ index. The result is illustrated by a simulation example. View full abstract»

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  • Remarks on the Lp-input converging-state property

    Publication Year: 2005, Page(s):1051 - 1054
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB) | HTML iconHTML

    Let X ⊂ RN and consider a system x˙ = f(x,u), f : X × RM → RN, with the property that the associated autonomous system x˙ = f (x,0) has an asymptotically stable compactum C with region of attraction A. Assume that x is a solution of the former, defined on [0,∞), corresponding to an input function u. Assume further that, for each compact... View full abstract»

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  • Controllability, observability, and parameter identification of two coupled spin 1's

    Publication Year: 2005, Page(s):1054 - 1058
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    In this note, we study the control theoretic properties of a couple of interacting spin 1's driven by an electromagnetic field. In particular, we assume that it is possible to observe the expectation value of the total magnetization and we study controllability, observability, and parameter identification of these systems. We give conditions for controllability and observability and characterize t... View full abstract»

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  • On hybrid impulsive and switching systems and application to nonlinear control

    Publication Year: 2005, Page(s):1058 - 1062
    Cited by:  Papers (202)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB) | HTML iconHTML

    In this note, a new class of hybrid impulsive and switching models is introduced and their asymptotic stability properties are investigated. Using switched Lyapunov functions, some new general criteria for exponential stability and asymptotic stability with arbitrary and conditioned impulsive switching are established. In addition, a new hybrid impulsive and switching control strategy for nonlinea... View full abstract»

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  • Fault detection in a mixed H2/H setting

    Publication Year: 2005, Page(s):1063 - 1068
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB) | HTML iconHTML

    In this note, we study the problem of fault detection in linear time-invariant (LTI) systems which are simultaneously effected by two classes of unknown inputs: Noises having fixed spectral densities and unknown finite energy disturbances. This problem is formulated as a mixed H2/H filtering problem. Necessary and sufficient conditions for local optimality are presente... View full abstract»

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  • Constrained Optimal Control of Linear and Hybrid Systems

    Publication Year: 2005, Page(s):1069 - 1070
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    Publication Year: 2005, Page(s): 1071
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    Publication Year: 2005, Page(s): 1072
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  • IEEE Control Systems Society Information

    Publication Year: 2005, Page(s): c3
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  • Blank page [back cover]

    Publication Year: 2005, Page(s): c4
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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