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2001 European Control Conference (ECC)

4-7 Sept. 2001

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Displaying Results 1 - 25 of 685
  • Welcome message

    Publication Year: 2001, Page(s):1 - 3
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  • Organizing boards

    Publication Year: 2001, Page(s):1 - 4
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  • Program

    Publication Year: 2001, Page(s):1 - 4
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  • Session index

    Publication Year: 2001, Page(s):1 - 78
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  • Author index

    Publication Year: 2001, Page(s):1 - 17
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  • Linear in parameters identifiability of extended bilinear systems

    Publication Year: 2001, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (314 KB) | HTML iconHTML

    A new model class is proposed to use for identification purposes, which is able to approximate many nonlinear systems quite accurately. Conditions are given for the system to be representable by a linear-in-parameters equation, which allows to use effective linear methods to solve the identification problem. Finally an example is provided to illustrate the use of the proposed model class for ident... View full abstract»

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  • Differential games on Lie groups

    Publication Year: 2001, Page(s):7 - 12
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB) | HTML iconHTML

    A new concept for nonlinear differential games on Lie groups is presented. This concept is a direct generalization of several topics, including right-invariant control systems on Lie groups, geodesic variational problems and of course linear-quadratic differential games on IRn. Besides introducing several definitions for games with and without boundary value problems, we discuss the wel... View full abstract»

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  • A normalized nonlinear control for discrete-time bilinear systems

    Publication Year: 2001, Page(s):13 - 17
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (645 KB) | HTML iconHTML

    Previously, a nonlinear passivity control has been proposed for a discrete-time (neutrally) stable bilinear system. However, the decay rate of the closed-loop system is not exponential. In this paper, a new nonlinear control is suggested to achieve exponential decay rate. It is also shown that the new control is robust against small parametric uncertainties. View full abstract»

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  • Anti-windup compensation method in iterative controller refinement scheme

    Publication Year: 2001, Page(s):18 - 23
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (589 KB) | HTML iconHTML

    The paper suggests a solution to the constrained control problem in a certain closed-loop iterative controller refinement scheme. In contrast to the general philosophy-design a linear controller and add an anti-windup compensator -, this paper attempts to provide a simple solution based on the ideal design paradigm: design such a controller that the controller output does not violate its limitatio... View full abstract»

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  • Generalization of the K-B parametrization for nonlinear processes

    Publication Year: 2001, Page(s):24 - 29
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB) | HTML iconHTML

    The simple Hammerstein and Wiener type block-oriented nonlinear models proved to be easy to handle in several identification and control schemes. The paper extends the generic two-degree of freedom controller scheme and the K-B-parametrization introduced for linear plants to these factorable nonlinear processes. Simulation examples are shown to present the efficiency of the new scheme and design f... View full abstract»

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  • Amplitude dependent stability analysis for non-linear sampled-data control systems

    Publication Year: 2001, Page(s):30 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB) | HTML iconHTML

    This paper analyzes the amplitude dependent behavior of nonlinear sampled-data control systems in a frequency domain. We apply the robust stability condition for nonlinear discrete-time feedback systems (which was derived in our previous papers) to a sampled-data control system containing a single nonlinear element in the forward path. In addition, we derive an instability condition for that type ... View full abstract»

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  • Iterative feedback tuning and closed-loop output error identification applied to Smith predictors

    Publication Year: 2001, Page(s):36 - 41
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB) | HTML iconHTML

    In this paper, we study the applicability of two algorithms to Smith predictor dead time compensation. The first algorithm is Iterative Feedback Tuning (IFT), a model free gradient descent controller tuning tool. Refer to [1, 2] for further details. The second algorithm is Closed-Loop Output Error (CLOE) identification. This identification algorithm minimizes the difference between the achieved cl... View full abstract»

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  • Modeling and control of systems with signal dependent nonlinear danymics

    Publication Year: 2001, Page(s):42 - 47
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1606 KB) | HTML iconHTML

    A modeling and control method for a class of nonlinear systems whose working-point varies with some process variable are presented. Based on two global NARMAX (nonlinear ARMAX) models, called the ExpARMAX (exponential ARMAX) models, a multi-step predictive control algorithm without resorting to on-line parameter estimation for the nonlinear systems are proposed. The one of the models is used as th... View full abstract»

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  • Dual predictive control considering future uncertainties in parameters, input, output and output reference

    Publication Year: 2001, Page(s):48 - 53
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (351 KB) | HTML iconHTML

    In this paper, the author proposes an algorithm of dual predictive control for a system expressed by a linear ARX (auto-regressive and exogenous) model with uncertain plant model parameters. Previously, the author proposed a dual predictive control algorithm which first considered the uncertainties in future control input values and in future output values included in an ARX model. The future inpu... View full abstract»

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  • State-space predictive control of a gas conditioning unit

    Publication Year: 2001, Page(s):54 - 59
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1159 KB) | HTML iconHTML

    An experimental application of a state-space predictive controller is presented. The controller is used for low-level control of a gas conditioning unit, an integrating process with two inputs and two outputs, in a real-life environment. An original approach to the tuning of the controller's feedback action for efficient disturbance rejection performance and robustness is introduced. Feedback acti... View full abstract»

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  • A finite horizon cascaded nonlinear predictive control of induction motor

    Publication Year: 2001, Page(s):60 - 65
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (241 KB) | HTML iconHTML

    In this paper the optimal nonlinear predictive control in cascaded structure design of induction motors is presented which provides global asymptotic tracking of smooth speed and flux trajectories. The controller is based on a finite horizon continuous time minimization of nonlinear predicted tracking errors. With full state measurement assumption, the robustness properties with respect to electri... View full abstract»

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  • An efficient quadratic programming algorithm for predictive control

    Publication Year: 2001, Page(s):66 - 71
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB) | HTML iconHTML

    This paper introduces a novel quadratic programming algorithm which will often converge to the optimal point in at most n iterations, when there are n degrees of freedom. Following a description of the algorithm and an efficient implementation, some comparisons are made with the more conventional active set method. View full abstract»

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  • Model-based active noise control using neural networks

    Publication Year: 2001, Page(s):72 - 77
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (502 KB) | HTML iconHTML

    This paper presents an identification procedure of an acoustic noise model for local sound control purposes. The microphone sensor was placed near the loudspeaker, in a way that ensures robustness and stability of the plant, making possible to verify the influence of the zone of quiet in the performance of the control design. The obtained data represents a nonlinear dynamic system, due to the actu... View full abstract»

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  • Vibration control of structures with uncertainties due to coupled subsystems

    Publication Year: 2001, Page(s):78 - 83
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (371 KB) | HTML iconHTML

    Vibrations in dynamical structures, as those encountered for instance in mechanical, aerospace or civil engineering, are often caused by internal or external excitations. One way to attenuate vibrations that can be undesirable for safety or other reasons is by the use of active control systems. This means to use feedback controllers driving actuators at appropriate locations between the structure ... View full abstract»

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  • Motion and vibration control of three dimensional flexible shaking table

    Publication Year: 2001, Page(s):84 - 89
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB) | HTML iconHTML

    This paper presents a new method for motion and vibration controls of a three dimensional flexible shaking table. The shaking table should be less weighted so that actuators require less control forces and higher fidelity to control commands. However, as the weight of shaking table is reduced, the natural frequencies of vibration modes of the table appear on operating frequency region. Such vibrat... View full abstract»

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  • A design oriented mathematical model for the control of wind excited structures

    Publication Year: 2001, Page(s):90 - 95
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB) | HTML iconHTML

    A state space linear mathematical model oriented to the design of Passive and Active Mass Dampers for tall buildings and bridges in wind is presented. The model accounts for an arbitrary number of passive and active devices located at arbitrary points of the structure. The aerodynamic terms of the stiffness and damping matrices are considered in order to reproduce the behavior of the structure und... View full abstract»

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  • Fatigue-mitigating controller design for a slender flexible antenna

    Publication Year: 2001, Page(s):96 - 101
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (267 KB) | HTML iconHTML

    In this paper the problem of fatigue mitigation in a slender flexible antenna has been addressed. The structure is subject to wind loads, which cause continuous stress cycles, giving rise to structural fatigue and breakage and reducing the service life. A robust active controller is introduced with the aim to reduce the amplitude of the stress cycles, despite model uncertainties; in particular an ... View full abstract»

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  • Multimode vibration control for a flexible building structure using H-infinity based robust control

    Publication Year: 2001, Page(s):102 - 107
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (735 KB) | HTML iconHTML

    This paper proposes a method of controlling the vibration of a flexible structure using H-infinity control theory. For this purpose, two reduced order lumped mass models, expressed by 5-DOF systems each, are derived. These models are derived by considering the five vibration modes along the x and y direction respectively and neglecting all the other higher frequency modes. Neglected vibration mode... View full abstract»

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  • Fuzzy filters applied to predictive control of MIMO processes

    Publication Year: 2001, Page(s):108 - 113
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB) | HTML iconHTML

    The application of model predictive control (MPC) to complex, nonlinear processes results in a non-convex optimization problem for computing the optimal control actions. This optimization problem can be addressed by discrete search techniques such as the branch-and-bound method, which has been successfully applied to MPC. The discretization, however, introduces a tradeoff between the number of dis... View full abstract»

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  • A new approach for stabilizing nonlinear systems with time delay

    Publication Year: 2001, Page(s):114 - 119
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (199 KB) | HTML iconHTML

    A new Proportional Parallel Distributed Compensation (PPDC) approach is utilized to stabilize time-delay systems on the basis of Takagi-Sugeno fuzzy model in this paper. We present new stability conditions for a class of time-delay systems whose dynamics are described by a T-S fuzzy model. The entire PPDC design procedure employing Linear Matrix Inequalities (LMI) is presented. A numerical example... View full abstract»

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