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Proceedings of the 28th IEEE Conference on Decision and Control,

13-15 Dec. 1989

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Displaying Results 1 - 25 of 617
  • Estimation of elastic coefficients for a two beam structure

    Publication Year: 1989, Page(s):613 - 617 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (271 KB)

    Consideration is given to the estimation of spatially dependent elastic parameters in a static distributed model of a simple structure composed of two beams at right angles. The potential energy functional of the system is formulated, and the existence of optimal estimators is proved for a regularized-output least-squares estimation problem. Regularity and approximation are discussed as well. The ... View full abstract»

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  • Hybrid control in the nematode

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (40 KB)

    Summary form only given. A research effort on the structure and organization of complex systems, based on a simple biological model, the nematode species C. elegans an dAscaris, has been initiated. The work, which emphasizes the nervous system, centers on construction of a computer representation of the organism, using multiple interconnected partial models reflecting its interacting computational... View full abstract»

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  • Hierarchical control of steady-state systems using an augmented Lagrangian tracking method with feedback

    Publication Year: 1989, Page(s):837 - 839 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    Resolution methods using feedback information, developed for the steady-state optimizing control of large-scale industrial processes, call upon the notion of the Lagrange operator. Further developments of one of these methods, to make it applicable to a problem with duality gaps and to improve the efficiency of the algorithm, are presented. The approach is based on an application of the augmented ... View full abstract»

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  • The pseudorandom asymptotic behavior of digitally controlled analog systems

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (81 KB)

    Summary form only given. The author has investigated some interesting descriptive and prescriptive questions that arise from a careful examination of the manner in which finite-precision phenomena, including measurement quantization and finite-wordlength arithmetic, affect the closed-loop performance of digitally controlled, discrete-time, state-space linear systems. In many cases of practical int... View full abstract»

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  • Decentralized control system design for a variable-cycle gas turbine engine

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (65 KB)

    Summary form only given. The selection of decentralized control structures, as well as decentralized control law design for the chosen structures, has been addressed. In each of these two phases of the design process due consideration has been given to the nonlinear characteristics of the engine, such as operating point variations, actuator limits, and fuel limit schedules. The chief analytical to... View full abstract»

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  • Bayesian adaptive filters for multiple maneuvering target tracking with measurements of uncertain origin

    Publication Year: 1989, Page(s):1397 - 1399 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (234 KB)

    The probabilistic data association method has been successfully used for tracking targets in the presence of source uncertainty and measurement inaccuracy. Using this technique, the problem of maneuvering-target tracking is considered. A description is given of three adaptive methods which are intrinsically different for tracking single and/or multiple targets. These methods are called the adaptiv... View full abstract»

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  • Recent developments in perturbation analysis

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (58 KB)

    Summary form only given. The purpose of this study is to review some of the more recent developments in perturbation analysis (PA) from a unified viewpoint. Concepts such as aggregation, statistical equivalence, smoothing, uniformization, and representation of stochastic processes take on more concrete meanings when viewed in the unified PA mind-set. The richness of the subject matter will become ... View full abstract»

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  • Certainty equivalence control with forcing: revisited

    Publication Year: 1989
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (42 KB)

    Summary form only given, as follows. Stochastic adaptive optimization problems are considered with the objective of minimizing the rate of increase of the learning loss, i.e. the additional cost one has to pay due to the inbuilt learning tasks in such problems. In particular, an examination is made of two problems: the multiarmed bandit problem, and the adaptive control of Markov chains. Previous ... View full abstract»

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  • Properties of the Euler-Bernoulli beam equation and the Kirchoff plate equation related to controllability

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    Summary form only given. A discussion is presented of the propagation of singularities, uniqueness questions, and other properties of the Euler-Bernoulli beam equation and the Kirchoff plate equation. A result previously obtained by the author (1985), which essentially gave an explicit solution to the boundary control problem for the plate equation u/sub tt/+ Delta /sup 2/u=0, is expanded upon to ... View full abstract»

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  • Time-varying vs. time-invariant compensation for rejection of persistent bounded disturbances and robust stabilization

    Publication Year: 1989
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (47 KB)

    Summary form only given, as follows. Consideration is given to time-varying compensation for linear time-invariant discrete-time plants subject to persistent bounded disturbances. In the context of certain feedback objectives, it is shown that time-varying compensation offers no advantage over time-invariant compensation. These results complement similar results for feedback systems subject to fin... View full abstract»

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  • A new feedback optimization problem

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    Summary form only given. Methods for stabilizing a plant P with an affordable variable structure Delta P are derived, starting with an operator optimization problem. When C represents the series compensator, Delta C the series compensator which is activated when Delta P is present, F the feedback compensator, Delta F the feedback compensator which is activated when Delta P is present, r the refere... View full abstract»

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  • Randomized and deterministic routing strategies for circuit-switched networks: design and performance

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (47 KB)

    Summary form only given. An investigation of two fundamentally separate classes of routing algorithms, randomized and deterministic, is reported. The main randomized algorithm is the recently introduced dynamic alternate routing algorithm of Gibbens and Kelly. In the contrasting deterministic algorithm, attempts to carry a call are made in a specific precomputed order. The design of these routing ... View full abstract»

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  • A numerical technique for the estimation of the diffusion coefficient in parabolic systems

    Publication Year: 1989, Page(s):2743 - 2747 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    A hybrid method for estimating a temporally and spatially varying diffusion coefficient in a parabolic system is presented. This technique combines the output-least-squares and the equation error method. The resulting optimization problem is solved by an augmented Lagrangian approach. Convergence of the algorithm and stability of the estimated coefficient with respect to perturbations in the obser... View full abstract»

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  • Proceedings of the 28th IEEE Conference on Decision and Control (Cat. No.89CH2642-7)

    Publication Year: 1989
    Request permission for commercial reuse | PDF file iconPDF (7882 KB)
    Freely Available from IEEE
  • Cascade interpretation of classical stability results

    Publication Year: 1989, Page(s):11 - 16 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The Schur-Cohn stability test procedure for discrete-time systems can be derived in several ways. A purely mathematical approach would typically be based on Rouche's theorem of complex variable theory. A second approach based on circuit-theoretic synthesis procedures throws additional light on the method. A third approach is based on linear prediction and Levinson's recursion. A review is presente... View full abstract»

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  • Cascade decompositions of linear systems in terms of realizations

    Publication Year: 1989, Page(s):2 - 10 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The authors consider how to express systems (or equivalently, rational matrix functions) as being built up from simpler more elementary systems (or functions). A measure of the complexity of a system is the dimension of the state space or equivalently, if controllability and observability are assumed, the McMillan degree of the associated transfer function. The authors discuss two ways in which si... View full abstract»

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  • A look at operator conditions in split algorithm-composite error adaptive systems

    Publication Year: 1989, Page(s):1940 - 1945 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    Conditions are developed for local stability of the generalized error systems which require only an approximate agreement between the split algorithm and composite error operators. These stability conditions rely on system excitation which provides an adequate degree of stabilization of a nominal error system of the standard form. This degree of stabilization is related to tolerable differences be... View full abstract»

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  • Practical stabilization of uncertain dynamical systems by continuous state feedback based on Riccati equation and a sufficient condition for robust practical stability

    Publication Year: 1989, Page(s):1693 - 1694 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A set of continuous state-feedback control laws for practical stabilization of a class of uncertain nonlinear dynamical systems is presented. A set of asymptotically stabilizing controllers is given for a subclass of systems. Sufficient conditions for practical and asymptotic stability in the presence of nonlinear uncertainty and disturbances are also given. Matrix Riccati equations are used to de... View full abstract»

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  • Guaranteed cost control via optimal parametric LQ design

    Publication Year: 1989, Page(s):386 - 391 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    For an optimal parametric linear quadratic (LQ) control problem, a design objective is to determine a controller of constrained structure such that the closed-loop system is asymptotically stable and an associated performance measure is optimized. In the presence of system uncertainty, the system obtained by parametric LQ design is further required to be robust in terms of maintaining the closed-l... View full abstract»

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  • Interval polynomial positivity

    Publication Year: 1989, Page(s):1938 - 1939 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    It is shown that a univariate interval polynomial is globally positive if and only if two extreme polynomials are globally positive. It is shown that the global positivity property of a bivariate interval polynomial is completely determined by four extreme bivariate polynomials. The cardinality of the determining set for k-variate interval polynomials is 2k. One of many possibl... View full abstract»

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  • Asymptotic behavior of random discrete event systems

    Publication Year: 1989, Page(s):1532 - 1538 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Various aspects of the asymptotic behavior of discrete-events dynamic systems (DEDS) in which the activity times are random variables are discussed. The main result is that the central limit theorem holds for DEDS and consequently that the cycle time of the system is asymptotically normally distributed. Calculations of the expectation and variance of the cycle time are given. Reducible random DEDS... View full abstract»

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  • A non-iterative method for design of linear robust controllers

    Publication Year: 1989, Page(s):1690 - 1692 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    A procedure is derived for determining a linear control law which guarantees asymptotic stability for an uncertain system. The technique is simpler to use than existing techniques since it does not require a numerical search procedure, but allows the control law to be obtained from some simple formulas View full abstract»

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  • A lower and upper bound for the gap metric

    Publication Year: 1989, Page(s):2337 - 2341 vol.3
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    A lower bound and an upper bound for the gap metric are presented. These bounds are sharp in the sense that there exist systems reaching the bounds. The lower bound is the H∞-norm of a rational matrix, and the upper bound is the sum of the lower bound and the norm of a Hankel operator. Only coprime fractional representations over L∞-matrices are ... View full abstract»

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  • A stability robustness test via quadratic Lyapunov forms

    Publication Year: 1989, Page(s):1714 - 1715 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    The stability robustness problem for a class of nominally linear systems subject to time-varying parameter uncertainty is dealt with. The allowable range of parameter variation is assumed to be a hyperrectangle in parameter space. The proposed robustness test, which is based on a Lyapunov approach, requires a finite number of positivity tests of a quadratic form in correspondence to some salient p... View full abstract»

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  • Percentile objective criteria in limiting average Markov control problems

    Publication Year: 1989, Page(s):1273 - 1276 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The point of view is adopted that there are many natural situations in which the controller is interested in finding a policy that will achieve a sufficiently high long-run average reward, that is, a target level with a sufficiently high probability, that is, a percentile. The key conceptual difference between this approach and the classical problem is that the present controller is not searching ... View full abstract»

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