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1999 European Control Conference (ECC)

Aug. 31 1999-Sept. 3 1999

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Displaying Results 1 - 25 of 855
  • Cover page

    Publication Year: 1999, Page(s): 1
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  • Welcome

    Publication Year: 1999, Page(s):1 - 7
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  • Session planner

    Publication Year: 1999, Page(s):1 - 4
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  • Programme

    Publication Year: 1999, Page(s):1 - 154
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  • Index of authors

    Publication Year: 1999, Page(s):1 - 64
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  • Sufficient conditions for Hurwitz and Schur stabilty of interval matrix polynomials

    Publication Year: 1999, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (145 KB)

    Based on Lyapunov equation and ∞-norm of matrices, sufficient conditions for Hurwitz and Schur stability of interval matrix polynomials are yielded. Since the parameter space of interval matrix polynomials with N order and K×K dimension is of 2NK2 dimension at most, it is difficult to determine its Hurwitz and Schur stability by finite algorithms. We simplify the stability... View full abstract»

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  • Adaptive variable structure control of nonlinear systems

    Publication Year: 1999, Page(s):7 - 13
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (539 KB)

    Variable Structure Control(VSC) with sliding mode is a special type of control technique that is capable of making a control system very robust with respect to system parameter variations and external disturbances. The chattering of the VSC signal can be reduced by several methods. One way is to augment the system with an integrator to isolate the system from the VSC control signal which causes th... View full abstract»

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  • Economic optimal control for a combined cycle power plant boiler

    Publication Year: 1999, Page(s):14 - 19
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (243 KB)

    A boiler simulator of a combined cycle power plant based on phenomenological equations, developed in Matlab-SIMULINK, is presented. Then, a new economical optimal control strategy based on minimising the operational costs of a boiler is designed and implemented. The solution is given by the optimal set points of the regulation level, i.e., the set points of the PI controllers. The optimisation pro... View full abstract»

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  • Distributed-parameter control of geometry in rapid prototyping

    Publication Year: 1999, Page(s):20 - 24
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (266 KB)

    This article introduces an analytical model of thermal rapid prototyping processes, using superposition of unit deposition distributions, composed of elementary ellipsoidal primitives. The real-time surface geometry model, with its parameters identified by in-process profile measurements, is used for Smith-prediction of the material shape. Thus, a distributed-parameter geometry control scheme is e... View full abstract»

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  • Integral variable structure robust controller design for multivariable plant output control

    Publication Year: 1999, Page(s):25 - 30
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (431 KB)

    The paper deals with the design of an integral variable structure systems that enable to achieve the asymptotic reference signal tracking and unmeasured disturbances rejection in MIMO plants. The sliding mode equivalence principle and inverse model control method are used to determine the required dynamic switching surfaces with integral parts ensuring disturbances estimation and compensative cont... View full abstract»

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  • Variable air volume control using a finite state machine

    Publication Year: 1999, Page(s):31 - 36
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB)

    Air terminals are an important component of most variable air volume air conditioning systems. Most air terminal controllers share the same continuous closed feedback loop control of the room loop whether the controller is pneumatic, analog electronic or digital electronic or other. Unfortunately, the controllers also share the same inability to provide good hybrid control. The use of split range ... View full abstract»

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  • H detection filter design for state delayed linear systems with parameter uncertainty

    Publication Year: 1999, Page(s):37 - 42
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7335 KB)

    This paper studies the problem of H∞ detection filter design for state delayed linear continuous-time systems with parameter uncertainty, in which the effects of faults and disturbances cannot be de-coupled from each other. The detection filter gains are designed so that, if the fault of the system is absent, the filter is convergent for the admissible uncertainty conditions. The... View full abstract»

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  • Matrix and frequency-domain inequalities for all guaranteed cost controllers of uncertain linear systems with unmatched uncertainties

    Publication Year: 1999, Page(s):43 - 48
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (249 KB)

    A differential game approach is used in this paper to derive all guaranteed cost linear state feedback controllers for linear uncertain systems in which a norm bounded uncertainty enters both the state and the input matrices. Generalizing previous results, we do not assume the uncertainties to be `matched', in other words they may enter the system dynamics through different matrices. The guarantee... View full abstract»

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  • Evolutionary computation in the design of optimum neural controllers

    Publication Year: 1999, Page(s):49 - 54
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (449 KB)

    This paper presents a novel technique in which fuzzy and evolutionary techniques are fused for the design of a class of optimum neural controllers. In the proposed technique the attributes of the performance of the closed system, i.e. overshoot, rise time and settling time in response to a step demand are related to the suitability of the controller through fuzzy linguistic rules. De-fuzzification... View full abstract»

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  • Speed control of electrical drives, based upon fuzzy logic — A synthesis

    Publication Year: 1999, Page(s):55 - 60
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (290 KB)

    The paper presents a synthesis of some author's activity. A speed control system for dc drives, based upon a PI fuzzy controller with integration at the output, with a simple rule base with only 9 rules is developed, analyzed and simulated. The sum-prod inference method is used with the center of gravity defuzzification. The performance criteria of the fuzzy control system are compared with the pe... View full abstract»

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  • Development of some fuzzy controllers with non-homogenous dynamics with respect to the input channels meant for a class of systems

    Publication Year: 1999, Page(s):61 - 66
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1812 KB)

    The paper presents a systematical development method for four fuzzy controllers with non-homogenous dynamics with respect to the two input channels; the proposed controller structures are meant for a class of second order and third order plants, which is specific to the field of electrical drives. The electrical drives are characterized by standard models for which even the classical (linear) cont... View full abstract»

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  • Application of fuzzy reasoning to load-frequency control in two area power system

    Publication Year: 1999, Page(s):67 - 70
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (399 KB)

    Fuzzy gain scheduling of proportional-integral (PI) controller are proposed for the area load-frequency control problem. Comparison study of conventional PI controller with proposed controller show that proposed controller can yield the best dynamic responses following a step load change. View full abstract»

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  • Detection of NARMA-sequence order using recurrent artificiai neural networks

    Publication Year: 1999, Page(s):71 - 76
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (221 KB)

    Recently artificial neural networks have been advocated as a possible technique for fault detection. Neural networks are noise tolerant and their ability to generalise the knowledge as well as to adapt during use are extremely interesting properties. The approach to solution of properties changes detection problem for stochastic sequences circumscribed by the nonlinear equations of an autoregressi... View full abstract»

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  • Canonical forms for controllable after-effect systems and applications

    Publication Year: 1999, Page(s):77 - 81
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (529 KB)

    Several classes of non-singular functional transformations for linear stationary dynamical systems with retarded argument are introduced. Then, the problem of determination of canonical forms is interpreted as the algebraic problem of universality for each class of transformations. Generalization of Kalman, Popov and Brunovsky canonical representations are given for systems of control and observat... View full abstract»

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  • Dynamic anti-WindUp for MIMO systems

    Publication Year: 1999, Page(s):82 - 84
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    This paper discusses the question of saturating actuators in a multi-input multi-output (MIMO) control system design. It is shown that direct application of standard anti-windup schemes can lead to loss of closed-loop stability, as well as, the degradation of the directional properties of the system. Consequently, a novel anti-windup scheme is proposed, where the intended procedure ensures stabili... View full abstract»

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  • Disturbance rejection with stability for bond graph models

    Publication Year: 1999, Page(s):85 - 90
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (533 KB)

    In this paper, the geometric approach and bond graph methodology are combined to characterize the structure of square linear systems modeled by bond graph. A graphical methodology is pointed out to compute symbolic expression of static state feedback for disturbance rejection with stability, when it is possible. View full abstract»

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  • Pole placement design using convex optimization criteria for the flexible transmission benchmark

    Publication Year: 1999, Page(s):91 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (549 KB)

    This paper deals with the design of robust digital controllers by the combined pole placement / sensitivity function shaping method. It shows that the design problem can be formulated and solved as a convex optimization problem. Specifications like dominant closed-loop poles or integration controller action may be introduced just as well as other fixed parts for the controller. The method is illus... View full abstract»

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  • Attitude control of underactuated spacecraft

    Publication Year: 1999, Page(s):97 - 102
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (430 KB)

    In this paper we consider the problem of maneuvering an axisymmetric spacecraft in the case that no torques about the symmetry axis can be exerted, for example due to a thruster failure. Explicit control laws are derived which steer such a spacecraft between states of pure spin between prescribed attitudes. These laws are found by minimizing a cost functional measuring the suitably weighted overal... View full abstract»

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  • Novel knowledge-based real-time control: Concept, architecture, problem reduction, and representation

    Publication Year: 1999, Page(s):103 - 108
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (226 KB)

    This paper explores novel knowledge-based real-time control. First, three control modularizations are originally proposed. Then, by applying problem reduction principle, the knowledge of solving real-time control problems is organized into a hierarchy of reduction from the total problem, which is represented by use of an AND/OR graph. Next, fuzzy linguistics is introduced into the common problem r... View full abstract»

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  • The underwater robot thruster control system with non-linear correction and reference model self-adjustment

    Publication Year: 1999, Page(s):109 - 112
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2094 KB)

    A method of a control system synthesis for the separate UR thruster is developed. A special non-linear correcting device and adaptive adjustment on reference model are applied for non-linearity compensating and required quality of control processes saving at change of thruster parameters in a given range. A new approach to forming a self-adjustment signal ensuring activity in a linear zone of the ... View full abstract»

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