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
  • Pipelined inverses of nonlinear dynamical systems

    Publication Year: 1989, Page(s):109 - 110 vol.1
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (148 KB)

    An iterative method is presented for the construction of the inverse of nonlinear dynamical systems. The method is based on CREATE (computed reference error adjustment techniques) and is implemented using a pipelined structure. Convergence conditions for linear time-varying systems are derived View full abstract»

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  • Robust strict positive realness: characterization and construction

    Publication Year: 1989, Page(s):426 - 430 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    Let P be a convex set of real polynomials. Consideration is given to the question of when there exists a real polynomial b (s), or, more generally, a real transfer function b (s), such that p(s)/b(s) is strictly positive real for all p(s)∈P. Necessary and sufficient conditions are found... View full abstract»

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  • Receding horizon control of nonlinear systems

    Publication Year: 1989, Page(s):107 - 108 vol.1
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (176 KB)

    The receding horizon control strategy provides a relatively simple method for determining feedback control for linear or nonlinear systems; the method is especially useful for the control of slow nonlinear systems, such as chemical batch processes, where it is possible to solve, sequentially, open-loop, fixed-horizon, optimal control problems online. The authors show that receding horizon control ... View full abstract»

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  • Game theory approach to optimal linear estimation in the minimum H-norm sense

    Publication Year: 1989, Page(s):421 - 425 vol.1
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (292 KB)

    A game theory approach to optimal state estimation is presented. It is found that under certain conditions a min-max estimation is identical to the optimal estimation in the minimum H∞-norm sense. These conditions are similar to those obtained by M. Mintz (J. Optim. Theory Appl., vol.9, p.99-111, 1972), where the relationship between Kalman filtering and the min-max terminal state e... View full abstract»

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  • A regularity result for the singular values of a transfer matrix and a quadratically convergent algorithm for computing its L -norm

    Publication Year: 1989, Page(s):954 - 955 vol.2
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (136 KB)

    The ith singular value of a transfer matrix, σi(H(jω)), need not be a differential function of ω at frequencies where its multiplicity is greater than one. However, near a local maximum the largest singular value σ1(H(jω)) has a Lipschitz second derivative, but need not have a third derivative. On the ... View full abstract»

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  • Robust control design for uncertain nonlinear systems under feedback linearization

    Publication Year: 1989, Page(s):102 - 106 vol.1
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (292 KB)

    A study is made of the design of robust stabilizing controllers for uncertain nonlinear systems which are feedback-equivalent to controllable linear systems. Uncertainty is considered to be parametric and is caused by unknown or time-varying modeled parameters. Uncertainties due to unmodeled dynamics are not addressed. The proposed design method does not necessarily require structure matching cond... View full abstract»

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  • Multivariable self-tuning control of a coupled electric-drive pilot plant using feedforward

    Publication Year: 1989, Page(s):2194 - 2195 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (344 KB)

    A multivariable self-tuning control design that is based on feedforward and the generalized minimum-variance controller is presented. The real-time implementation of this controller on a coupled electric-drive pilot plant is discussed. The results show that good performance can be achieved using this design View full abstract»

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  • Design of decentralized projective controls for disturbance rejection

    Publication Year: 1989, Page(s):492 - 497 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (380 KB)

    A two-stage design problem is formulated to achieve disturbance rejection using low-order decentralized controllers. Using the H∞-optimal state feedback solutions as the reference, the authors parameterize all decentralized controllers of a given order retaining the dominant poles in the closed-loop system. Using a Frobenius-Hankel norm-minimization approach, they determi... 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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  • Filtering and smoothing in an H setting

    Publication Year: 1989, Page(s):415 - 420 vol.1
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (412 KB)

    Consideration is given to the problems of filtering and smoothing for linear systems in an H∞ setting, i.e. the plant and measurement noises have bounded energies (are in L 2), but are otherwise arbitrary. Two distinct situations for the initial condition of the system are considered: in one case the initial condition is assumed known; in the other cas... View full abstract»

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  • Frequency domain synthesis for maximal rejection of persistent bounded disturbances

    Publication Year: 1989, Page(s):952 - 953 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (152 KB)

    A frequency domain design methodology was proposed by S. Jayasuria and M.A. Franchek (1988) for synthesizing controllers that maximize the size of a persistent bounded disturbance while satisfying time domain constraints placed on the system states and the input and the bandwidth limits on actuators and sensors. The design technique is based on mapping the time domain constraints into the frequenc... View full abstract»

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