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Decision and Control, 1989., Proceedings of the 28th IEEE Conference on

Date 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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  • 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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  • 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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  • 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
  • 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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  • Mathematical model of echoes in laser-based aerial bathymetric surveying

    Publication Year: 1989, Page(s):1779 - 1784 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A mathematical model is proposed in which the effects of light propagation are represented geometrically by a cone of propagation. The cone is described by the position of its axis as a function of depth, an effective angle of dispersion and an effective power distribution inside the cone. The analytical model is used to obtain ocean bottom echo-pulse shapes. These results are compared to existing... View full abstract»

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  • Minimum-time feedback control of robotic manipulators

    Publication Year: 1989, Page(s):2482 - 2486 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Efficient robot motions often involve control saturation. The method of neighboring optimal control is used to design a feedback scheme which takes this characteristic into account. It requires precomputation of control gain along the nominal path. Feedback mechanization involves updating the switching times based on the available measurements of deviation of the robot from its nominal path. The f... View full abstract»

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  • Nonasymptotic results for finite-memory WLS filters

    Publication Year: 1989, Page(s):1785 - 1790 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 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. Conditions under which such invertibility is guaranteed are discus... View full abstract»

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  • Design of H-optimal compensators for singularly perturbed systems

    Publication Year: 1989, Page(s):2397 - 2398 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    The two-Riccati-equation formulation of compensator design is used to design stabilizing compensators that achieve a prescribed bound on the H-norm of the disturbance-to-error transfer function of singularly perturbed systems. Approximate solutions for the Riccati equations are obtained based on the solutions of the Riccati equations of the fast subsystem and those of a ... View full abstract»

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  • A dynamic scheduling for flexible manufacturing systems: hierarchical control and dispatching by heuristics

    Publication Year: 1989, Page(s):846 - 852 vol.1
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    A method for controlling job flows in a flexible manufacturing system is proposed. It consists of loading control and dispatching components for the loading station and workstations. For loading control, a modified linear program is solved by heuristics. For dispatching, learning by experimentation is used to formulate the heuristics. Results of simulation studies are given to show the effectivene... View full abstract»

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  • A connection between singular perturbation theory and high gain PI feedback control

    Publication Year: 1989, Page(s):2399 - 2400 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    An application of the principles of singular perturbation theory to the design of high-gain proportional and integral control of systems with parameter uncertainties is presented, and the main results are summarized View full abstract»

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  • Variable structure systems and binary control

    Publication Year: 1989, Page(s):2196 - 2198 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    A novel approach to development of control systems for uncertain processes is described. The approach relies on the concept of an operator variable and the binary control principle. Their combination results in algorithms of control under uncertainty. The design of generalized structural flowcharts of associated control systems is described View full abstract»

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  • Numerical experiment with new conjugate direction methods for nondifferentiable optimization

    Publication Year: 1989, Page(s):2457 - 2462 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Results obtained by using a new algorithm for nondifferentiable optimization are presented. This algorithm is an extension of the Wolfe-Lemarechal algorithm, which simulates conjugate direction methods for differentiable problems. The author tested two versions of his algorithm. The first one is intended for nondifferentiable problems whose whole subdifferential is easily determined. The second on... View full abstract»

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  • Undecidability results for deterministic communicating sequential processes

    Publication Year: 1989, Page(s):2701 - 2707 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    A study is made of the subset of the communicating sequential processes formalism in which processes are described in terms of recursive equations that use only constant processes, deterministic choice, parallel composition, and sequential composition. Even with this limited version, the formalism is powerful enough to model a Turing machine, so that a number of important problems such as boundedn... View full abstract»

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  • Analysis and synthesis of asynchronous, asymptotically reliable, asymptotically controllable serial production lines

    Publication Year: 1989, Page(s):60 - 64 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    Synchronous serial production lines are advantageous from the production rate point of view whereas asynchronous ones ensure a higher quality. Both, however, are usually run in a balanced mode where the cycle times of all machines are identical. It is shown that asynchronous lines being run in an appropriate unbalanced mode, could have a production rate close to that of the synchronous lines. Anal... View full abstract»

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  • Synthesis of controllers for real-time discrete event systems

    Publication Year: 1989, Page(s):138 - 144 vol.1
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    A (possibly infinite-state) real-time discrete-event plant is modeled as a timed transition system. The free (uncontrolled) behavior of the plant is usually unsatisfactory in some important respect. A specification (written in real-time temporal logic) of required plant behavior is therefore to be imposed on the plant. The key result is a controller development procedure which shows how to systema... View full abstract»

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  • Systems of random iterative continuous mappings with a common fixed point

    Publication Year: 1989, Page(s):872 - 877 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A study is made of systems of Lipschitz-continuous mappings which are applied successively on an initial point x0 in a closed nonempty complete metric space. All mappings possess the same fixed point x*, and are applied at random with repetitions by choosing a mapping from a finite set of such functions. A lower bound is found on the probability that the system's state... View full abstract»

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  • Simultaneous pole assignment for a class of linear time invariant SISO systems

    Publication Year: 1989, Page(s):1247 - 1252 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    Consideration is given to the problem of finding one compensator which simultaneously assigns all closed-loop poles of a family of single-input, single-output (SISO) plants to a prespecified admissible region. The family of plants {P(s,q):q Q} may be uncountable, allowing for the possibility of a continuum of variations in plant parameters. A numb... View full abstract»

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  • A local stability condition for optimal control problems

    Publication Year: 1989, Page(s):288 - 290 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The modified Hamiltonian dynamical system associated with a discounted infinite-horizon optimal control problem is considered. It is shown that the sufficient conditions for global asymptotic stability developed by the author (J. Econ. Theory, vol.48, 1989) are also necessary for local asymptotic stability, if the stationary point under consideration is symmetric or the discount rate is zero View full abstract»

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  • On the estimation of sliding domains and stability regions of variable structure control systems with bounded controllers

    Publication Year: 1989, Page(s):793 - 794 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    The problem of the estimation of sliding domains and regions of asymptotic stability with sliding for a class of variable structure systems with a bounded controller is considered. Lyapunov-type arguments are used. The results are applicable to a class of uncertain systems with matched uncertainties View full abstract»

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  • On stochastic stabilization

    Publication Year: 1989, Page(s):2243 - 2246 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    In some settings the deliberate introduction of noise can have a beneficial effect on the rate of convergence of numerical algorithms for finding the minima of functions. This is an important aspect of simulated annealing. However, there are situations which, in contrast to simulated annealing, do not involve reducing the noise level with time and which are also of interest in a computational and ... View full abstract»

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  • Estimation of buffer size using stochastic approximation methods

    Publication Year: 1989, Page(s):1066 - 1068 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    Estimation of buffer size requirement in a serial manufacturing system is formulated as a stochastic optimization problem. Two stochastic approximation methods used in conjunction with a single-run optimization procedure are presented. They are the Kiefer-Wolfowitz and Robbins-Monro methods, and they are shown to be superior to the direct search simplex method. The Robbins-Monro method integrated ... View full abstract»

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  • 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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  • Lossless cascade networks and stochastic estimation

    Publication Year: 1989, Page(s):17 - 22 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The notion of matrices with generalized displacement structure is introduced. An efficient procedure for Cholesky factorization of nonstationary covariances with such structure is presented. An inverse scattering interpretation of this procedure relates it to lossless cascade models with p+q-1 parameters per layer where { p, q} denotes the displacement inertia o... View full abstract»

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  • Sliding regimes in pulse-width-modulation systems design

    Publication Year: 1989, Page(s):2199 - 2204 vol.3
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    A design method is proposed for the specification of a variety of pulse-width-modulation (PWM) feedback controllers acting on plants described by nonlinear dynamical systems. It is first shown that an average model of the PWM-controlled system, derived by making an infinite sampling frequency assumption, is simply obtained by replacing the discontinuous control by a memoryless nonlinearity complet... View full abstract»

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