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IEE Proceedings - Control Theory and Applications

Issue 6 • Date 21 Nov. 2003

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Displaying Results 1 - 13 of 13
  • Adaptive LQG controller tuning

    Publication Year: 2003, Page(s):655 - 665
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    Controller tuning is a basic step in any control application. This tuning is a complex process composed of several steps starting with the plant analysis and ending with the verification of the designed controller. There are various tools that help in particular steps of the design, but the complete path of the design is not supported. An attempt is made to offer a procedure of 'complete' controll... View full abstract»

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  • Control of self-oscillating systems

    Publication Year: 2003, Page(s):599 - 610
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (466 KB)

    In order to obtain a mathematical model of a self-sustained oscillation, a Van der Pol oscillator can be enhanced upstream and downstream with transfer functions identified from measurements. Using a specific engineering control technique, the above model has been used to define a control law aimed at suppressing the oscillation. The method has been applied to a two-dimensional buffet observed on ... View full abstract»

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  • Adaptive stabilisation of ethanol production during the continuous fermentation of Saccharomyces cerevisiae

    Publication Year: 2003, Page(s):666 - 672
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (273 KB)

    Two different approaches for adaptive control design are investigated and compared from a user's point of view. The first one is an application of the Matlab toolbox routine Designer, and the second approach is based on the commonly used adaptive linearising control (ALC) design method. The continuous aerobic fermentation of Saccharomyces cerevisiae is taken as an object for control. The control t... View full abstract»

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  • Using circle criteria for verifying asymptotic stability in PI-like fuzzy control systems: application to the milling process

    Publication Year: 2003, Page(s):619 - 627
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (414 KB)

    A fuzzy controller that is suitable for regulating the milling process and ensuring absolute stability with a finite domain (i.e. local asymptotic stability) is presented. The stability analysis is performed on the basis of two versions of the circle criterion: (i) the extended circle criterion reducing the problem to the scalar case; and (ii) the multiple-input multiple-output circle criterion, h... View full abstract»

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  • Editorial: tools for computer aided design of adaptive controllers

    Publication Year: 2003
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (166 KB)

    This short special section is the result of an attempt to map results and directions in the area of computer-aided design of adaptive controllers. The area is to a large extent neglected in academic research and has certainly not been systematically analysed. The papers are intended to highlight this useful, interesting and difficult area and inform academic researchers and practising control engi... View full abstract»

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  • Pretuning and adaptation of PI controllers

    Publication Year: 2003, Page(s):585 - 598
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (668 KB)

    A method is proposed for the closed-loop tuning of a PI controller in cascade with a plant having an unknown transfer function, based on adding a variable-frequency sinewave to the loop's set-point. It applies design-point methodology in the Nyquist diagram to a phase-frequency adaptor coupled with gain estimators that monitor the closed-loop signals. The approach is shown to give good results ove... View full abstract»

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  • Reliable H control of uncertain descriptor systems with multiple time delays

    Publication Year: 2003, Page(s):557 - 564
    Cited by:  Papers (11)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (280 KB)

    The reliable H controller design problem for uncertain descriptor systems with actuator failures and multiple time delays is investigated. Sufficient conditions to guarantee that the unforced system is regular, impulse-free and exponentially stable are derived. The derived conditions are expressed in terms of a set of linear matrix inequalities, which can be effectively solved by... View full abstract»

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  • Prior information in structure estimation

    Publication Year: 2003, Page(s):643 - 653
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (341 KB)

    The problem of a joint quantification of prior knowledge and structure estimation is solved within the dynamic exponential family of models. The result is elaborated for normal controlled autoregressive models and illustrated on a simulated example. The problem arose as a substantial ingredient of the automatic commission of adaptive controllers, described in a companion paper. From this perspecti... View full abstract»

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  • Sliding-mode observer for speed-sensorless induction motor drives

    Publication Year: 2003, Page(s):611 - 617
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (449 KB)

    A sliding-mode observer for the speed-sensorless direct torque vector control of induction motors is proposed. The observer estimates the motor speed, the rotor flux, the angular position of the rotor flux and the motor torque from measured terminal voltages and currents. The use of the nonlinear sliding-mode technique provides very good performance for both low- and high-speed motor operation and... View full abstract»

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  • Output feedback sliding mode control for the flying height of a pickup head in near-field optical disk drives

    Publication Year: 2003, Page(s):629 - 635
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    An output sliding mode control method to produce a stable flying height for a pickup head in a near-field optical disk drive is presented. When the optical disks have a large amplitude vibration that makes a stable flying height difficult to attain, a piezoelectric bender is used to complement an air bearing at the head/disk interface. Control simulation for an identified model using measured vibr... View full abstract»

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  • Control of linear systems using piecewise continuous systems

    Publication Year: 2003, Page(s):565 - 576
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB)

    A control method is presented based on the use of piecewise continuous systems (PCS) as a control vector generator over sampling periods. The PCS has two inputs and one output which is equivalent to the control vector. Each input is corresponding to one specific time space, the first one to the discrete time space defined by S = {tk, k = 0,1,2, ... }, and the second one to the continuou... View full abstract»

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  • H model reduction for singular systems: continuous-time case

    Publication Year: 2003, Page(s):637 - 641
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (233 KB)

    The problem of H model reduction for linear singular systems in the continuous-time case is considered. The objective is to find a reduced-order system such that the associated error system is admissible and satisfies a prescribed H norm bound constraint. Necessary and sufficient conditions for the solvability of this problem are obtained in terms of linear matr... View full abstract»

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  • Missile longitudinal autopilot design using a new suboptimal nonlinear control method

    Publication Year: 2003, Page(s):577 - 584
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (305 KB)

    A missile longitudinal autopilot is designed using a new nonlinear control synthesis technique called the θ-D approximation. The particular θ-D methodology used is referred to as the θ-D H2 design. The technique can achieve suboptimal closed-form solutions to a class of nonlinear optimal control problems in the sense that it solves the Hamilton-Jacobi-Bellman equation ... View full abstract»

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