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Decision and Control, 1988., Proceedings of the 27th IEEE Conference on

Date 7-9 Dec. 1988

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  • Proceedings of the 27th IEEE Conference on Decision and Control (IEEE Cat. No.88CH2531-2)

    Publication Year: 1988
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  • Robustness of flexible structures against small time delays

    Publication Year: 1988, Page(s):1647 - 1648 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    The authors give transfer matrices for some models described by partial differential equations. From these transfer matrices the poles and zeros are easily derived. The effect of a small time delay in the feedback loop is considered, and it is shown that if the feedthrough in the loop is too strong, this will give instability. The transfer matrices have the advantage that the amount of feedthrough... View full abstract»

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  • Space structure control using moving bank multiple model adaptive estimation

    Publication Year: 1988, Page(s):712 - 717 vol.1
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    The authors investigate the feasibility of applying moving bank multiple model adaptive estimation algorithms to flexible space structure control. This form of estimation/control is an attempt to reduce the computational loading associated with the implementation of a full-scale multiple-model adaptive estimator/controller. It is shown that the moving bank controller performs nearly identically to... View full abstract»

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  • Sliding mode control of flexible spacecraft under disturbance torque

    Publication Year: 1988, Page(s):718 - 723 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The authors present a control system design for large-angle rotational maneuvers of a spacecraft-beam-tip body (an antenna or a reflector) configuration. It is assumed that an unknown but bounded disturbance torque is acting on the spacecraft. A sliding mode attitude control law is derived for the slewing of the space vehicle. This slewing control law requires only attitude error and its derivativ... View full abstract»

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  • A rule based procedure for self-tuning PID controllers

    Publication Year: 1988, Page(s):1947 - 1951 vol.3
    Cited by:  Papers (2)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The authors present a rule-based self-tuning procedure for industrial PID controllers. It is based on theoretical and heuristic principles together with the pattern recognition approach introduced by E.H. Bristol (1977) and operational strategies proposed by T.W. Kraus and T.J. Myron (1984). The main concepts are discussed, the procedure is described, and a sample of the rules is presented. Comput... View full abstract»

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  • Controller synthesis for infinite dimensional systems based on a passivity approach

    Publication Year: 1988, Page(s):724 - 729 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    The author discusses a generalization of hyperstability to systems in Hilbert space and its application to finite-dimensional stabilizing compensator design. The basic idea is to characterize tolerable perturbations in terms of the passivity of the nominal closed-loop system. Controllers achieving the required closed-loop passivity property can then be designed using H-o... View full abstract»

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  • Automated synthesis of decentralized tuning regulators for systems with measurable DC gain

    Publication Year: 1988, Page(s):1952 - 1957 vol.3
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    The design of decentralized integral tuning regulators (DTR) for unknown MIMO linear time-invariant plants is considered. It is assumed that the DC gain matrix A of the plant can be measured. Then, given A, an algorithm for determining a sequence for implementing and adjusting the local controllers is presented. The sequence is chosen so that the sensitivities of the critical pol... View full abstract»

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  • Absolute stability analysis of multivariable regulators through the Popov criterion

    Publication Year: 1988, Page(s):2194 - 2198 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The multivariable Popov criterion is used to derive the sectors of absolute stability for two classes of regulators in both the continuous and discrete-time cases. The first class corresponds to the well known linear quadratic regulators; in the second one a feedback control law depending on the solution of a Lyapunov equation is considered. Relatively simple reasoning shows that the absolute stab... View full abstract»

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  • Directionality, coupling, and multivariable loop-shaping

    Publication Year: 1988, Page(s):399 - 340 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The author presents results useful in applying multivariable loop-shaping ideas to ill-conditioned plants. First, he examines the relation between open- and closed-loop properties at one loop-breaking point. He also investigates how feedback properties at one point are related, both nominally as well as robustly, to those at the other point, and describes the role played by the directional propert... View full abstract»

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  • Structural convergence improvement schemes on adaptive control

    Publication Year: 1988, Page(s):1941 - 1944 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Convergent behavior of adaptive control with the synthesis of the feedback structure is studied. A refinement of the error model or a modification of the feedback block can improve the rate of convergence, taking the tradeoff between robustness and fast convergence into account. A typical error model for adaptive control systems is shown. Generalized adaptive systems, instability mechanisms, and r... View full abstract»

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  • On the inner and outer poles and zeros of a linear time-varying system

    Publication Year: 1988, Page(s):910 - 914 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The notion of inner and outer poles and zeros of a linear time-varying discrete-time system is developed in terms of noncommutative factorizations of operator polynomials with time-varying coefficients. Emphasis is placed on left and right poles and zeros, which are referred to as outer poles and zeros. The outer poles and zeros arise in the study of system reducibility, stability, and transmissio... View full abstract»

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  • On the numerical approximation of an optimal correction problem

    Publication Year: 1988, Page(s):1570 - 1574 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    The numerical solution of an optimal correction problem for a damped random linear oscillator is studied. A numerical algorithm for the discretized system of the associated dynamic programming equation is given. To initiate the computation, a numerical scheme derived from the deterministic version of the problem is adopted. A correction-type algorithm based on a discrete maximum principle is intro... View full abstract»

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  • On the problem of degeneration of linear systems by high gain

    Publication Year: 1988, Page(s):431 - 432 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    The authors construct two examples to show that when the gain goes to infinity as a point on the Grassmannian, A specified closed loop system can degenerate, under different conditions, to: (1) a singular system with a unique solution or (2) a singular system with no unique solution. They observe that in case (1) the degeneration into the reduced system is robust whereas in case (2) it is not robu... View full abstract»

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  • Self-training cognitive preview control for autonomous vehicle path navigation

    Publication Year: 1988, Page(s):2286 - 2291 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    A description is given of a cognitive preview control strategy for autonomous-vehicle steering and cruise guidance by combining optimal preview control theory with rule-based perceptive cruise command generation. The authors also propose a self-training cognition procedure for determining a suitable perceptive schedule for cognitive cruise and steering control. The control yields humanlike driving... View full abstract»

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  • A stochastic approximation algorithm for large-dimensional systems in the Kiefer-Wolfowitz setting

    Publication Year: 1988, Page(s):1544 - 1548 vol.2
    Cited by:  Papers (26)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    The author considers the problem of finding a root of the multivariate gradient equation that arises in function maximization. When only noisy measurements of the function are available, a stochastic approximation (SA) algorithm of the general type due to Kiefer and Wolfowitz (1952) is appropriate for estimating the root. An SA algorithm is presented that is based on a simultaneous-perturbation gr... View full abstract»

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  • Robustness in the l1-based design methodology

    Publication Year: 1988, Page(s):2199 - 2201 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    The authors are concerned with obtaining necessary and sufficient conditions for robustly stabilizing a class of plants characterized by a known linear-shift-invariant plant with additive perturbations of the form of possibly nonlinear, time-varying l1-stable operators. The authors show that, in some sense, the small gain theorem is necessary and sufficient even when the pertur... View full abstract»

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  • Optimality of weighted least squares load balancing

    Publication Year: 1988, Page(s):1480 - 1485 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The authors consider a model comprising several servers, with possibly different services speeds, each equipped with its own queue. Each server receives a dedicated arrival stream of jobs; there is also a stream of generic jobs that arrive at a job scheduler and can be individually allocated to any of the servers. It is shown that if the arrival streams are all Poisson, and all jobs have the same ... View full abstract»

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  • Refinement of robot motor skills through reinforcement learning

    Publication Year: 1988, Page(s):1096 - 1101 vol.2
    Cited by:  Papers (10)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    An extension of earlier work in the refinement of robotic motor control using reinforcement learning is described. It is no longer assumed that the magnitude of the state-dependent nonlinear torque is known. The learning controller learns about not only the presence of the torque, but also its magnitude. The ability of the learning system to learn this real-valued mapping from output feedback and ... View full abstract»

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  • Design of a nonlinear TACAN bearing tracking servo using the extended Kalman filter

    Publication Year: 1988, Page(s):736 - 741 vol.1
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    An analytical and simulation study was used to develop a near-real-time optimum digital computer TACAN bearing tracking algorithm. An extended Kalman filter estimator was utilized to determine a tracking loop configuration and its expected performance. Examination of the filter covariance matrix and gains revealed that a few key elements of the covariance matrix were the significant contributors t... View full abstract»

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  • Square root information filtering using the covariance spectral decomposition

    Publication Year: 1988, Page(s):382 - 387 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A square-root state-estimation algorithm is introduced which operates in the information mode in both the time and the measurement update stages. The algorithm, called the V-Lambda filter, is based on the spectral decomposition of the covariance matrix into a VΛVT form, where V is the matrix whose columns are the eigenvectors of the covariance ... View full abstract»

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  • An M-matrix and majorant approach to robust stability and performance analysis for systems with structured uncertainty

    Publication Year: 1988, Page(s):2176 - 2181 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    The authors use the theory of nonnegative and M-matrices to develop robust stability and performance results for two types of uncertainty characterizations. Performance is measured in terms of the deviations of the system outputs from their nominal values. For uncertainty with norm-bounded subblocks the development leads to a frequency-dependent multiloop small-gain theorem. The stability... View full abstract»

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  • Hybrid dynamical systems theory and nonlinear dynamical systems over finite fields

    Publication Year: 1988, Page(s):209 - 213 vol.1
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    The authors study the logic and synchronization characteristics of general dynamical systems called hybrid dynamical systems (HDSs). The proposed theory generalizes the notion of discrete-event dynamical systems by handling numerics as well as symbolics. This theory is supported by the programming language SIGNAL and a mathematical model of relational style. This framework makes it possible to for... View full abstract»

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  • An asymptotic analysis of hierarchical control of manufacturing systems

    Publication Year: 1988, Page(s):1856 - 1857 vol.3
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    An asymptotic analysis of a hierarchical manufacturing system with machines subject to breakdown and repair is presented. The machine fluctuations are much faster than the accumulation and discounting of costs, and this gives rise to a limiting problem in which the stochastic machine availability is replaced by the equilibrium mean availability. The value function for the original problem converge... View full abstract»

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  • Sensitivity minimization via extended linear parameterization of all stabilizing compensators

    Publication Year: 1988, Page(s):433 - 434 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    The authors present a new linear parametrization of all stabilizing compensators in the case of linear multivariable systems. It is shown that sensitivity minimization can be achieved with closed-loop poles lying in specified neighborhoods of assigned nominal poles View full abstract»

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  • Optimal allocations of resources in orbital engagements

    Publication Year: 1988, Page(s):2442 - 2446 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Two models are formulated that reflect different aspects of satellite and antisatellite (ASAT) operations. Objective functions appropriate to each model are suggested, and allocations of resources that optimize values of these objective functions are determined. The first model, called the cost model, corresponds to the problem of finding the least cost response to a postulated ASAT threat when fo... View full abstract»

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