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[1992] Proceedings of the 31st IEEE Conference on Decision and Control

1992

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  • Extensions of mixed- mu bounds to monotonic and odd monotonic nonlinearities using absolute stability theory. II

    Publication Year: 1992, Page(s):2820 - 2823
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  • Signal estimation with a noisy saturating sensor

    Publication Year: 1992, Page(s):1234 - 1235 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    Summary form only given. Many biological and man-made sensors saturate outside a relatively narrow range of input signal values. Although such sensors are clearly nonlinear, they often exhibit nearly linear response within their range of high sensitivity. The problem considered in this work is estimating a signal using noisy measurements from such a sensor. The sensor considered has a high-gain (o... View full abstract»

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  • On low-noise modeling: a summary

    Publication Year: 1992
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    Summary form only given. It has been affirmed that the observability indices of the pair H,F and the corresponding linear dependences of the rows of the observability matrix provide a parametrization of all solutions of the exact (noiseless) linear modeling problem. Additional constraints such as complexity or stability can also be taken care of in this framework. In the present work, an attempt i... View full abstract»

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  • Proceedings of 1992 31st IEEE Conference on Decision and Control

    Publication Year: 1992
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    Freely Available from IEEE
  • Robustness studies of a proximate time-optimal controller

    Publication Year: 1992, Page(s):3559 - 3564 vol.4
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    Two practical time-optimal controllers for rapid slewing of type-three and type-two third-order plants, PTOS3 and PTOS3τ, respectively, have been developed. The robustness of the PTOS3τ and corresponding time-optimal controller is compared to parameter variations and flexible unmodeled dynamics. It is found that the PTOS3τ controller is much more robust than the time-optimal controller... View full abstract»

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  • Asymptotic output tracking through singular points for a class of uncertain SISO nonlinear systems

    Publication Year: 1992, Page(s):3040 - 3041 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The authors consider an output tracking problem. This problem consists mainly of knowing if it is possible, given an uncertain nonlinear system, to identify those paths for which there exists a continuous control such that the output of the nonlinear system will follow this path View full abstract»

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  • Average optimal stationary policies and linear programming in countable space Markov decision processes

    Publication Year: 1992, Page(s):3325 - 3327 vol.4
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB)

    Average optimal stationary policies in countable space Markov decision processes and optimal solutions of an associated infinite dimensional linear program are discussed. Using the theory of linear programming in abstract spaces, sufficient conditions for the existence of optimal solutions are presented, and some previous ones are interpreted View full abstract»

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  • New global regulation performance indices and optimal robust eigenstructure

    Publication Year: 1992, Page(s):3565 - 3570 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

    A set of global dynamic regulation performance indices is proposed. The indices have a clear engineering background and physical meaning, and are defined in the state space from the geometric characteristics on the regulation response to a normalized initial disturbance. The necessity of defining the performance indices and their advantages are presented. The calculation for the performance indice... View full abstract»

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  • Optimal filtering of digital binary images corrupted by union/intersection noise

    Publication Year: 1992, Page(s):3287 - 3292 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (563 KB)

    Digital binary image data are modeled as realizations of a uniformly bounded discrete random set, a mathematical object which can be directly defined on a finite lattice. The problem of estimating realizations of discrete random sets distorted by a degradation process that can be described by a union/interaction noise model is considered. Some theoretical justification of the popularity of certain... View full abstract»

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  • Optimal control of nonlinear systems with model-reality differences

    Publication Year: 1992, Page(s):257 - 258 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (293 KB)

    Dynamic integrated system optimization and parameter estimation (DISOPE) is used to develop a method for solving nonlinear optimal control problems where the model employed to compute the optimal solution is different from reality. An iterative procedure is described which achieves the correct real solution despite model-reality differences. Results which extend earlier work on steady-state optima... View full abstract»

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  • On the equilibrium sets of linear systems with saturating feedback control

    Publication Year: 1992, Page(s):3042 - 3043 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (287 KB)

    A linear system under the action of saturating feedback control (SFC) behaves as a nonlinear dynamical system. This raises the possibility of the existence of more than one equilibrium point. The problem of the existence of equilibrium points as a prerequisite to study the region of attraction for linear systems with SFC is addressed. Most results are derived from the fact that the topological deg... View full abstract»

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  • Decentralized solutions of the linear-exponential-Gaussian problem

    Publication Year: 1992, Page(s):2159 - 2164 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (617 KB)

    The authors consider stochastic control problems with an exponential cost criterion. Necessary and sufficient conditions and the control law of the decentralized linear-exponential-Gaussian (LEG) team problem with a one-step delayed information sharing pattern are given. The one-step delayed information pattern is that only the past observations are available and the current observations are not a... View full abstract»

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  • Scheduling of a benchmark flexible manufacturing cell using the Lagrangian relaxation technique

    Publication Year: 1992, Page(s):398 - 403 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    With some modifications, the Lagrangian relaxation technique is applied to a benchmark flexible manufacturing cell (FMC) producing turbocharger parts. Extensive testing shows that reasonable results are obtained with relatively small computation times. Analysis indicates that this technique is most effective in reducing the root-mean-square tardiness of multioperational jobs View full abstract»

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  • Finite dimensional approximation and robust controller design for semigroup systems

    Publication Year: 1992, Page(s):3512 - 3513 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (254 KB)

    It is shown that the doubly Bezout factorizations of a constructed approximation converge to those of the semigroup systems correspondingly. The feedbacks and output injections designed according to the finite dimensional approximations are shown to be able to stabilize the semigroup systems. It is found that the unstable parts of the approximating systems are identical to those of the semigroup s... View full abstract»

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  • Robust learning control for constrained robots

    Publication Year: 1992, Page(s):608 - 613 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (514 KB)

    A learning control algorithm is developed for constrained motion control and force control for robot systems. The proposed controller is able to improve its performance in terms of both motion and force tracking errors in the presence of state disturbances, output measurement noises and errors in initial conditions as the operation is repeated. It is shown that the motion and force trajectories co... View full abstract»

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  • On linear-quadratic optimal regulator for continuous-time descriptor system

    Publication Year: 1992, Page(s):987 - 988 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    An approach to dealing with the linear-quadratic optimal control problems for the continuous-time descriptor systems is proposed. A Riccati equation with a new form is established through the use of the necessary conditions for the optimal control. Unlike the existing approaches, transformation to the Riccati equation is made directly to find its solution. The sufficient conditions for the existen... View full abstract»

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  • Minimizing the maximum value of the regulated output to a fixed input

    Publication Year: 1992, Page(s):3571 - 3576 vol.4
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (494 KB)

    The problem of minimizing the maximum amplitude of a regulated output in response to a prespecified reference signal, which may be unbounded is discussed. The continuous-time case is considered. This optimization problem is converted into a simpler and more tractable one. Methods of solving it are discussed. For every ε>0, it is possible to compute the magnitude of the optimal error within... View full abstract»

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  • On statistical reconstruction of random fields and the art of forgery

    Publication Year: 1992, Page(s):3293 - 3298 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (554 KB)

    The problem of statistical reconstruction of Gaussian random fields is considered. It is shown that the reconstruction is made up of the deterministic (predictable and hence unique) component and the stochastic (unpredictable and hence nonunique) component. The reconstruction procedure is briefly sketched for general homogeneous random fields. It is shown that major computational simplifications c... View full abstract»

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  • An adaptive controller for abruptly changing MIMO systems with nonlinear model uncertainties

    Publication Year: 1992, Page(s):259 - 260 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (258 KB)

    A novel adaptive control algorithm for deterministic unknown abruptly changing MIMO (multi-input multiple output) systems subject to nonlinear model uncertainties is presented. A fast parameter tracking algorithm and pole-assignment calculation are included in the proposed controller. It is shown that all the variables in the closed-loop system are uniformly bounded if the linear bound of the nonl... View full abstract»

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  • Adaptive stabilization under the weakest condition

    Publication Year: 1992, Page(s):3620 - 3621 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (297 KB)

    Adaptive stabilization for single-input single-output continuous-time systems with unknown parameters and subject to stochastic or deterministic disturbances is discussed. The condition used is the weakest; it only requires the system order and the stabilizability of the system in consideration, which are necessary for stabilizing a system even in the case where the system parameters are known. Ne... View full abstract»

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  • Adaptive control of a class of nonlinear systems with a triangular structure

    Publication Year: 1992, Page(s):278 - 283 vol.1
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

    An adaptive control approach to a class of nonlinear systems with a triangular structure is developed. The systems considered here are described by a set of second-order differential equations, and thus there are many applications to the control of mechanical systems. The design procedure of the control law is based on the idea of properly using the structure of the system, and sequentially develo... View full abstract»

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  • Experiments on active optical and structural control

    Publication Year: 1992, Page(s):1824 - 1829 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (595 KB)

    A nanometer-level optical path-length control experiment for a large baseline space interferometer has been implemented on the JPL Phase B testbed. The experiment consisted of a multilayer control of active structural control to augment structural damping and active path-length control to directly compensate for optical path-length variation. The approach has been successful in maintaining the opt... View full abstract»

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  • Suboptimal control of singularly perturbed systems and periodic optimization

    Publication Year: 1992, Page(s):3044 - 3049 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (509 KB)

    A traditional approach to singularly perturbed optimal control problems is based on an approximation of these problems by some reduced problems. The reduced problems are obtained via the formal replacement of the fast variables by the states of equilibrium of the fast subsystems considered with frozen slow variables and controls. It is shown that such as approximation may not be valid, and that it... View full abstract»

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  • Optimal input matching in sampled data control systems

    Publication Year: 1992, Page(s):1941 - 1943 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    An optimal hybrid input matching (OHIM) controller is proposed to control linear time-invariant systems. The method is based on redesign of a desired pure continuous-time closed-loop system, and the controller is optimal in the sense that the L2(0,∞)-norm of the discrepancy between the obtained sampled data and continuous-time output signals is minimized. The derivation o... View full abstract»

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  • Distributed estimation of power mismatch

    Publication Year: 1992, Page(s):564 - 565 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (294 KB)

    The design of distributed filters for estimating the real power mismatch in multicontrol area power systems is considered. The filters' size in each area is equal to the number of tie lines plus one. Decoupling of the filters is achieved through additional measurements. A three-area system is used to demonstrate the proposed method. The system has an 18th-order model and at each area a third-order... View full abstract»

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