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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
  • Optimality of the last-in-first-out (LIFO) service discipline in queuing systems with real-time constraints

    Publication Year: 1989, Page(s):1073 - 1074 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    Consideration is given to a G/G/1 queuing system where the objective is to maximize the probability that a customer's system time does not exceed a given deadline. The deadline is defined to be the maximum amount of time the customer can spend in the system. The authors show that for deadlines that are i.i.d. random variables with concave cumulative distribution functions, last-in-first-out (LIFO)... View full abstract»

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  • On controllable predicates and languages in discrete-event systems

    Publication Year: 1989, Page(s):123 - 124 vol.1
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    In discrete-event systems two control techniques, called supervisory control and state feedback logic, have been proposed. It is shown that controllability of the legal language for a given predicate is equivalent to that for the corresponding reachability set. The relationship between the supremal controllable subpredicate of the predicate and the supremal controllable sublanguage of the correspo... View full abstract»

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  • A new class of stable time-varying systems and the coefficient assignment problem

    Publication Year: 1989, Page(s):2343 - 2347 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Techniques are derived for the internal stabilization of SISO time-varying systems and the simultaneous coefficient assignment of a r-tuple of MISO time-varying systems. It is shown that the systems considered need not be slowly varying. In order that the compensators derived be robust, a class of bounded-input-bounded-output stable systems is introduced. It is noted that all the techniques are co... View full abstract»

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  • Relative equilibria for two rigid bodies connected by a ball-in-socket joint

    Publication Year: 1989, Page(s):692 - 697 vol.1
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    For simple mechanical systems with symmetry, a variational principle on configuration space determines relative equilibria. This principle of symmetric criticality is applied to a problem of coupled rigid bodies. Numerical optimization by CONSOLE (a package intended originally for optimization-based control system design) is shown to be an effective technique for searching for some of the relative... View full abstract»

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  • Passive computed torque algorithms for robots

    Publication Year: 1989, Page(s):1638 - 1644 vol.2
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    Computed torque algorithms are used to compensate for the changing dynamics of robot manipulators in order to ensure that a constant level of damping is maintained for all configurations. There are three significant problems with existing computed torque algorithms. First, they are nonpassive and, as shown, can lead to unstable behavior; second, they make poor use of actuator capability; and third... View full abstract»

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  • Optimal scheduling of servers in a queueing system with constraints [packet radio networks]

    Publication Year: 1989, Page(s):1071 - 1072 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    The problem addressed considers random arrivals (or generation) of packets at the nodes and poses the question of (a) existence of schedules that guarantee finite queueing delays and/or (b) finding schedules that produce minimum queueing delay. As such a problem involves interacting queueing systems, it is not feasible to attempt to solve it for a PRN (packet radio network) of general topology. In... View full abstract»

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  • Dealing with blocking in supervisory control of discrete event systems

    Publication Year: 1989, Page(s):117 - 122 vol.1
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A study is made of the supervisory control of discrete-event systems where blocking is unavoidable or nonblocking solutions do not yield good performance. The authors consider strategies to improve the performance of a given blocking supervisor. Performance is characterized in terms of a satisfying measure (how much of the legal marked behavior is achieved) and a blocking measure (how often the ex... View full abstract»

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  • A robust motion coordination of two dynamically interacting systems with model uncertainties and bounded disturbances

    Publication Year: 1989, Page(s):686 - 691 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    A control scheme is presented for motion coordination of two dynamic systems interacting through a common port. The scheme incorporates dynamic constraints that result from the interaction involved in generating the control actions for the interacting systems. It resembles the conventional leader-follower control scheme with an added feature of reference model following. Robustness results for the... View full abstract»

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  • Use of asymptotic observers having-high-gains in the state and parameter estimation

    Publication Year: 1989, Page(s):1791 - 1794 vol.2
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    The estimation of the unknown parameters of a nonlinear system is reduced to the estimation of its state variables by a state-space immersion. The Luenberger observer is used in the state estimation of the extended nonlinear system. The use of high gains in the cancellation of nonlinearities in order to simplify the observer design is studied. The high gain induces a time-scale separation between ... View full abstract»

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  • On the dynamics of floating four-bar linkages

    Publication Year: 1989, Page(s):1632 - 1637 vol.2
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    The Hamiltonian structure of floating, planar, four-bar linkages is discussed. The geometry of the configuration space is related to the classical theory of mechanisms. For generic values of the kinematic parameters, the techniques of symplectic (and Poisson) reduction apply View full abstract»

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  • Arbitrary pole and zero assignment with N-delay input control using stable controllers

    Publication Year: 1989, Page(s):1253 - 1258 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    It was shown by T. Mita and Y. Chida (1988) that with a two-delay input control scheme it is possible to assign all the poles and zeros of a closed-loop system using state feedback. This result is generalized to the case of N-delay input control. In such a scheme the input to the continuous system is changed N times more often than the output is sampled. Using such a scheme, it i... View full abstract»

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