Proceedings of 35th IEEE Conference on Decision and Control

13-13 Dec. 1996

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  • Proceedings of the 36th IEEE Conference on Decision and Control

    Publication Year: 1996, Page(s):0_3 - 0_6
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    Freely Available from IEEE
  • A sliding approach to tracking problems in DC-DC power converters

    Publication Year: 1996, Page(s):4008 - 4009 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (204 KB)

    This communication develops time dependent sliding schemes that make available the generation of prescribed voltages at the load resistance of second order basic DC-DC switching power converters using exact and approximate techniques. Restrictions on the obtained outputs, due to the intrinsic nature of the control input, are studied and derived. View full abstract»

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  • Modelling and optimization for a type of fuzzy nonlinear programming problems in manufacturing systems

    Publication Year: 1996, Page(s):4401 - 4405 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (416 KB)

    A model for a type of fuzzy nonlinear programming problems (FNP) is proposed. This paper develops an inexact approach to solve this type model of nonlinear programming problems. Instead of finding an exact optimal solution. This approach uses a genetic algorithm (GA) with mutation along the weighted gradient direction to find a family of solutions with acceptable membership degrees. Then by means ... View full abstract»

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  • A colored Petri net-based approach to the design of controllers

    Publication Year: 1996, Page(s):4425 - 4432 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (829 KB)

    In this paper, we extend the supervisory control theory and a supervisor synthesis problem to a class of colored Petri nets. More specifically, we investigate the forbidden state control problem with full observation in which the discrete-event system is modeled as a colored Petri net with a symmetry specification. This problem is decidable if the colored Petri net has finite color sets and bounde... View full abstract»

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  • Partial state reference model control of chemical reactors

    Publication Year: 1996, Page(s):4825 - 4830 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (540 KB)

    A partial state reference model (PSRM) controller and its certainty equivalence based adaptive version have been evaluated by application to batch and semi-batch reactor pilots. The PSRM control design is particularly carried out using a linear quadratic control approach within the delta operator formulation. The PSRM control allows us to specify the tracking and regulation dynamics independently,... View full abstract»

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  • Adaptive robust control by set membership estimation and switching: stability and performance analysis

    Publication Year: 1996, Page(s):3743 - 3748 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (460 KB)

    Adaptive control of time-invariant plants, in the presence of unmodeled dynamics and bounded disturbances, via set membership identification is proposed. The set estimator maps the uniformly bounded normalized equation error on parametric error characterizing the modeled part of the plant. Based on the set estimator and implemented by fuzzy logic, a switching control policy improves the system per... View full abstract»

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  • Local coefficients of Walsh functions and their applications to model reference adaptive control

    Publication Year: 1996, Page(s):3737 - 3742 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (404 KB)

    In the existing method of Walsh functions (WF), a major disadvantage is that the process signals need to be recorded prior to obtaining their Walsh spectral expansions. This paper proposes a novel method of local coefficients of WF to overcome this shortcoming. An approximate algorithm of local coefficients is developed. Several properties of local coefficients and error analysis of the method are... View full abstract»

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  • An efficient algorithm for finding the centers of conics and quadrics in noisy data

    Publication Year: 1996, Page(s):3735 - 3736 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (180 KB)

    We present an efficient algorithm for finding the center of conics and quadrics of known parameters in noisy or scarce data. The problem arises in applications where a conic or quadric of known parameters, such as a circle of known radius, is extracted from a scene or part. Although the original problem is nonlinear and usually requires an iterative method for its solution, we reduce it to the wel... View full abstract»

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  • Robust discrete quasi-sliding mode adaptive controller

    Publication Year: 1996, Page(s):4020 - 4021 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (156 KB)

    By estimating the upper bound of the perturbations and the unknown parameters, a discrete-time quasi-sliding mode adaptive controller with no chattering is presented for the system with perturbations and partial model uncertainties. The global system is guaranteed to be stable in the sense that all signals remain bounded. No a priori knowledge of the perturbations is required. Simulation results s... View full abstract»

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  • Strong and weak convexity for linear differential games

    Publication Year: 1996, Page(s):3729 - 3734 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (372 KB)

    Zero-sum linear differential games on a fixed time segment with geometrically constrained controls are considered. We study the efficiency of an algorithm to calculate the game value function, which is based on Krasovskii's concept of the stable bridge for differential games. The second order estimates of the error of the discrete-time algorithm for games with strongly convex penalty functions and... View full abstract»

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  • To brake or not to brake? Is there a question?

    Publication Year: 1996, Page(s):3723 - 3728 vol.4
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (452 KB)

    The vehicle following problem in an automated highway is approached from the point of view of safety. In particular the situation where an intervehicle collision is unavoidable and the relative velocity at impact is what determines the safety of the situation, is considered. It is shown, using tools from optimal control, that braking as hard as possible is not the best possible strategy in all cas... View full abstract»

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  • New approach to chattering analysis in systems with sliding modes

    Publication Year: 1996, Page(s):4014 - 4019 vol.4
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (532 KB)

    A chattering phenomenon as a low frequency oscillation in systems with sliding modes is analyzed via the describing functions technique. It is proposed to design a sliding surface to provide the passivity condition to the open loop dynamics of a modeled plant. It is shown that first order stable lag unmodeled dynamics does not imply chattering in a real sliding mode. A sliding mode controller desi... View full abstract»

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  • On control problems for some advection-reaction-diffusion systems

    Publication Year: 1996, Page(s):3717 - 3722 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB)

    The present article is concerned with the Neumann boundary control of systems modeled by parabolic equations of advection-reaction-diffusion type with a particular emphasis on systems which are unstable if uncontrolled. To solve these problems we use a combination of finite difference methods for the time discretization, finite element methods for the space discretization and conjugate gradient al... View full abstract»

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  • Variable structure switching surfaces design for reaching phase enhancement

    Publication Year: 1996, Page(s):4012 - 4013 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (184 KB)

    Presents a methodology for deriving the switching control laws that, operating in the reaching phase of a sliding modes control, leads the states vector into the sliding surface with small and brief reaching transients View full abstract»

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  • Robust normalised LPV gain scheduling

    Publication Year: 1996, Page(s):3982 - 3983 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (188 KB)

    This paper demonstrate some robustness guarantees to the linear parameter varying (LPV) stabilisation. The idea is to use the inherent robustness to unstructured perturbations facilitated by using the normalised plants. Some parameter dependent weights might be introduced in an open loop design to improve the achieved robustness/performance levels. The resulting gain-scheduled controller is obtain... View full abstract»

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  • Analysis of robust asymptotic tracking performance for a class of uncertain plants with triangular structure

    Publication Year: 1996, Page(s):4782 - 4787 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (408 KB)

    In the design of servo systems, it is desired to use as few servomechanisms as possible. So it is necessary to find the necessary and sufficient condition for given servo problems. Particularly we are interested in servo problems of uncertain plants. In this paper we deal with the robust tracking problem of a class of uncertain plants with triangular structure. To reduce unnecessary servomechanism... View full abstract»

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  • Hysteretic control influence operators representing smart material actuators: identification and approximation

    Publication Year: 1996, Page(s):3711 - 3716 vol.4
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (428 KB)

    This paper discusses mathematical issues that arise in identifying a class of hysteresis operators that have been employed for modeling shape memory alloy actuation. Specifically, the identifiability of a class of distributed hysteresis operators that arise in the control influence operator of a class of second order evolution equations is investigated. We introduce distributed, hysteretic control... View full abstract»

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  • Robust ℋ filtering for uncertain Markovian jump linear systems

    Publication Year: 1996, Page(s):4808 - 4813 vol.4
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (456 KB)

    This paper investigates the problem of ℋ∞ filtering for a class of uncertain Markovian jump linear systems. The uncertainty is assumed to be norm-bounded and appears in all the matrices of the system state-space model, including the coefficient matrices of the noise signals. It is also assumed that the jumping parameter is available. We develop a methodology for designing a M... View full abstract»

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  • A reduced order method for control of fluid flows

    Publication Year: 1996, Page(s):3705 - 3710 vol.4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (456 KB)

    This article presents a reduced order method for simulation and control of fluid flows. The major advantage of this method over others, such as finite element, finite difference or spectral method is that it has fewer degrees of freedom. The present methodology's feasibility for flow control is demonstrated on two boundary control problems. The first one is a velocity tracking problem in cavity fl... View full abstract»

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  • A sliding mode approach to robust generation on DC-to-DC converters

    Publication Year: 1996, Page(s):4010 - 4011 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (152 KB)

    An approach is proposed for the design of a sliding feedback control scheme, regulating a Buck converter in an AC signal generating task. The approach is based on the specification of a switching control law which accomplishes indirect asymptotic sinusoidal output voltage generation for the Buck converter. The control scheme is found to be robust to a variety of perturbations, namely variations on... View full abstract»

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  • Wave control of a class of flexible beams by an idea of imaginary beam

    Publication Year: 1996, Page(s):4228 - 4233 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (432 KB)

    This paper proposes a method of wave control for a class of uniform flexible beams by introducing an idea of a fictitious beam with finite length and distributed damping. This beam is assumed to be connected serially at the free-end of the real beam of interest, and its function is to act as an absorber to absorb the energy conveyed by travelling waves. For the damping force two kinds of damping t... View full abstract»

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  • Fuzzy control of a nonlinear pointing testbed with backlash and friction

    Publication Year: 1996, Page(s):4363 - 4368 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (472 KB)

    The pointing testbed is an experimental apparatus which can be used to examine the effects of nonlinearities, such as backlash and Coulomb friction, on the control performance. In this paper, a fuzzy controller is proposed to carry out high accuracy and fast positioning of the testbed. A reference model is utilized to obtain a smooth transient response and avoid undesirable overshoots. Through off... View full abstract»

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  • Robust stabilization of discrete-time parameter-dependent systems: the finite precision problem

    Publication Year: 1996, Page(s):3976 - 3981 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (428 KB)

    Realization of digital filters or implementation of controllers in a digital computer may lead to unexpected instabilities resulting from the finite precision effects. Stability is usually ensured for an idealized discrete-time realization of the system. However, as soon as A/D and D/A conversions are involved, the quantization of the state of the system, due to adder overflow, magnitude truncatio... View full abstract»

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  • Robust H control for uncertain general nonlinear systems

    Publication Year: 1996, Page(s):3780 - 3781 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (140 KB)

    In this paper, the robust H control problem for uncertain general nonlinear systems is considered. The state feedback case is studied. All proofs given are simple and clear. In addition, it provides a deep insight in the synthesis of the corresponding robust H controllers for uncertain affine nonlinear systems View full abstract»

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  • Optimal control of compressible Navier-Stokes equations

    Publication Year: 1996, Page(s):3700 - 3704 vol.4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (312 KB)

    We study optimal control for compressible isentropic Navier-Stokes equations. Existence of optimal solutions and necessary optimality conditions are established by employing the variational formulation. Numerical approximation results are presented for a boundary velocity control problem View full abstract»

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