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IEEE Transactions on Automatic Control

Issue 2 • Date Feb 1991

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Displaying Results 1 - 19 of 19
  • A new tool for the analysis of modal control laws: the `pole attractors'

    Publication Year: 1991, Page(s):219 - 223
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    In the design of modal control laws, the choice of the closed-loop eigenvalues is emphasized. In the output feedback case, this choice becomes more and more crucial as the degrees of freedom appearing in the control design are decreasing. Then, the assignment of right eigenvectors often induces weakly observable poles. The reluctance of the feedback to move these poles away can be represented by s... View full abstract»

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  • Nonasymptotic results for finite-memory WLS filters

    Publication Year: 1991, Page(s):198 - 206
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    A nonasymptotic analysis of properties of weighted least squares (WLS) adaptive filters used for identification of time-varying systems is presented. It is shown that the problem of mean-square boundedness of WLS estimates is closely related to the problem of invertibility-in the mean sense-of the corresponding regression matrix. Necessary and sufficient conditions are discussed for such invertibi... View full abstract»

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  • Proportional-plus-multiintegral stabilizing compensators for a class of MIMO feedback systems with infinite-dimensional plants

    Publication Year: 1991, Page(s):207 - 213
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    A method is presented for designing proportional-plus-multiintegral stabilizing compensators for a class of feedback systems with exponentially stable infinite-dimensional plants. These compensators enable the feedback system to asymptotically track polynomial inputs and suppress polynomial disturbances of corresponding order. When used in design, the effectiveness of the construction procedure pr... View full abstract»

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  • On stability properties of nonlinear systems with slowly varying inputs

    Publication Year: 1991
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    Systems with slowly varying inputs are discussed as a special class of two-time-scale systems, and singular perturbation results are seen as convenient tools to analyze their properties. A lemma by F.C. Hoppensteadt (Trans. Amer. Math. Soc., vol.123, p.521-35, 1966) for a parameterized family of systems is restated and applied to the analysis of systems with slowly varying inputs View full abstract»

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  • Sensitivity of the solutions to differential matrix Riccati equations

    Publication Year: 1991, Page(s):213 - 215
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    A nonlocal sensitivity analysis of differential matrix Riccati equations arising in the design of linear optimal systems with quadratic cost and optimal filters is presented. A perturbation bound for the state of the closed-loop system is also given. The approach proposed for studying the sensitivity of the solution to perturbations in the data may be easily extended to more general differential m... View full abstract»

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  • Analysis of a class of real-time multiproduct lot scheduling policies

    Publication Year: 1991, Page(s):243 - 248
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    A single machine processing different types of parts is considered. Switching from one type to another involves a setup time. The part types may have different processing times. The resulting scheduling problem is treated as a dynamical system for which several feedback policies that are implementable in real time and that stabilize the system are discussed. The main results are a characterization... View full abstract»

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  • Control of nonlinear systems with Markovian parameter changes

    Publication Year: 1991, Page(s):233 - 238
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The control of hybrid systems in which a totally observed state process is generated by a nonlinear stochastic differential equation whose parameters are functions of a random jump process called the plant regime is considered. Regime transitions typically represent target maneuvers in a tracking system. The control task is split between a jump detection and identification (JDI) filter and a discr... View full abstract»

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  • Optimal control of 2-D systems

    Publication Year: 1991, Page(s):223 - 228
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    Two-dimensional (2-D) optimal control theory that parallels one-dimensional (1-D) optimal control is developed. A generalized performance measure suited to 2-D systems is introduced. The canonical equations associated with this performance measure and a general nonlinear model are obtained. The 2-D linear quadratic regulator problem is formulated, and its canonical equations are derived for the Ro... View full abstract»

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  • Estimation of random states in general linear models

    Publication Year: 1991, Page(s):248 - 252
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    An estimate, called the generalized Fisher estimate, is formulated, and it is shown how to calculate it without assuming invertibility of any of the matrices involved and with allowing the state vector to be random. The result subsumes all of the usual Fisher-type estimates as special cases. This problem was originally addressed by the author (Estimation, Control, and the Discrete Kalman Filter Sp... View full abstract»

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  • The extended Routh's table in the complex case

    Publication Year: 1991, Page(s):253 - 256
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The construction of the Routh's table in the complex case is extended to the special case of vanishing leading array elements without introducing the classical ε method. It is shown that it is always possible to associate to any polynomial G with complex or real coefficients an extended Routh's table and that the number of sign changes in the first column of this table equals the num... View full abstract»

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  • On the structure of the minimum-time control law for multiple robot arms handling a common object

    Publication Year: 1991, Page(s):230 - 233
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The problem of the structure of the minimum-time control for multiple robot arms cooperatively handling a common object is addressed. The dynamical system is modeled by considering the arms as closed kinematic chains. It is shown that the structure of the minimum-time control law for individual joint actuators requires that at least one of the actuators is always saturated on any finite-time subin... View full abstract»

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  • Local-global double algebras for slow H adaptation. II. Optimization of stable plants

    Publication Year: 1991, Page(s):143 - 151
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    For Pt.I see ibid., vol.36, no.2, p.130-42 (1991). The authors presently establish an explicit formula linking global and local sensitivity for systems with stable plants, in which local sensitivity is a Lipschitz-continuous function of data. Frequency-domain estimates of time-domain sensitivity norms, which become accurate as rates of time variation approach zero, are obtained. Notions of adaptiv... View full abstract»

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  • Aggregation of the policy iteration method for nearly completely decomposable Markov chains

    Publication Year: 1991, Page(s):178 - 187
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    A steady-state optimal control problem is considered for nearly completely decomposable Markov chains. In order to apply the policy iteration method of R.A. Howard (Dynamic Programming and Markov Processes, Cambridge, MA, MIT Press, 1960), a high-dimensional ill-conditioned system of algebraic equations must be solved in the value-determination step. Although algorithms exist for aggregation of th... View full abstract»

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  • State estimation for systems with sojourn-time-dependent Markov model switching

    Publication Year: 1991, Page(s):238 - 243
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A switching process in which the switching probabilities depend on a random sojourn time is a class of semi-Markov processes and is encountered in target tracking, systems subject to failures, And also in the socioeconomic environment. In such a system, knowledge of the sojourn time is needed for the computation of the conditional transition probabilities. It is shown how one can infer the transit... View full abstract»

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  • Local-global double algebras for slow H adaptation. I. Inversion and stability

    Publication Year: 1991, Page(s):130 - 142
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    For Pt.II see ibid., vol.36, no.2, p.143-51 (1991). In this two-part work, a common algebraic framework is introduced for the frozen-time analysis of stability and H optimization in slowly time-varying systems, based on the notion of a normed algebra on which local and global products are defined. Relations between local stability, local (near) optimality, local coprime ... View full abstract»

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  • Leak detection in an experimental heat exchanger process: a multiple model approach

    Publication Year: 1991, Page(s):167 - 177
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    An application of a multiple model nonlinear filtering technique is discussed for the detection of leaks in a heat-exchanger process. The results of simulation study and an experimental study on a laboratory heat-exchanger process are presented. A simple decision logic scheme (threshold crossing) is used to process the outputs of the leak-detection algorithm to indicate the status of the process, ... View full abstract»

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  • A new adaptive learning rule

    Publication Year: 1991, Page(s):188 - 197
    Cited by:  Papers (113)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    A method is presented for nonlinear function identification and application to learning control. The control objective is to identify and compensate for a nonlinear disturbance function. The nonlinear disturbance function is represented as an integral of a predefined kernel function multiplied by an unknown influence function. Sufficient conditions for the existence of such a representation are pr... View full abstract»

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  • Filtering and smoothing in an H setting

    Publication Year: 1991, Page(s):152 - 166
    Cited by:  Papers (281)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1160 KB)

    The problems of filtering and smoothing are considered for linear systems in an H setting, i.e. the plant and measurement noises have bounded energies (are in L2), but are otherwise arbitrary. Two distinct situations for the initial condition of the system are considered; the initial condition is assumed known in one case, while in the other the initi... View full abstract»

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  • Overload control using rate control throttle: selecting token bank capacity for robustness to arrival rates

    Publication Year: 1991, Page(s):216 - 219
    Cited by:  Papers (11)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The design of rate-control throttles, which are used for overload control of computer and communication networks is discussed. An analysis of the rate-control throttle is presented. It is found that if the token bank capacity is 10 or more and if jobs arrive as a Poisson process, then for many practical applications in digital switching systems and telecommunication networks the control settings c... 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