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IEE Proceedings - Control Theory and Applications

Issue 2 • Date Mar 1999

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Displaying Results 1 - 17 of 17
  • Exponential stabilisation of state-delay systems

    Publication Year: 1999, Page(s):131 - 136
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (444 KB)

    The exponential stabilisation problem of a class of dynamical systems with time delay and mismatched uncertainties is considered. The structure of the uncertainties is affinely bounded. The time delay factor could be variable or of constant value. In the case when the time delay is variable, it is established that state-feedback controllers can be constructed to render the closed-loop system expon... View full abstract»

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  • Optimal digital design of hybrid uncertain systems using genetic algorithms

    Publication Year: 1999, Page(s):119 - 130
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (976 KB)

    The paper presents a time-domain design methodology for optimal digital design of multivariable sampled-data parametric uncertain systems using genetic algorithms (GAs). A continuous-time parametric uncertain plant, cascaded with an analogue parametric uncertain prefilter is formulated by means of multiple linear cascaded continuous-time nominal models, generated from the perturbed system and pref... View full abstract»

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  • Integrated approach to eigenstructure assignment by state feedback

    Publication Year: 1999, Page(s):113 - 118
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    Parametric and subspace approaches to eigenstructure assignment are integrated to provide a simple algorithm for eigenstructure assignment by state feedback. The algorithm provides naturally for the case of common open- and closed-loop right characteristic vectors. The integrated approach enables the eigenstructure assignable with multiple eigenvalues to be readily identified View full abstract»

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  • Intelligent learning control for a class of nonlinear dynamic systems

    Publication Year: 1999, Page(s):165 - 170
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (404 KB)

    A controller is presented which guarantees system stability by using a feedback controller coupled with an intelligent compensator, and achieves precise tracking by using a set of iterative learning rules. In the feedback plus intelligent controller unit, the feedback control part stabilises the overall closed-loop system and keeps its error bounded, and the intelligent compensator estimates and c... View full abstract»

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  • Control Theory and Applications

    Publication Year: 1999, Page(s):0_1 - 0_2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (120 KB)

    First Page of the Article
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  • Neurofuzzy-model-following control of MIMO nonlinear systems

    Publication Year: 1999, Page(s):157 - 164
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (624 KB)

    A neurofuzzy logic controller with a compensating neural network and a fine-tuning mechanism in the consequent membership functions is proposed to design the model-following control of MIMO nonlinear systems. The control strategy is developed to facilitate interconnection compensation among subsystems by the compensating neural network and to realise feedback linearisation by online function appro... View full abstract»

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  • Method for evaluating stability bounds for discrete-time singularly perturbed systems

    Publication Year: 1999, Page(s):227 - 233
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (516 KB)

    The problem of evaluating the stability bounds of discrete-time singularly perturbed systems is considered. A direct method using critical stability criteria has been developed to obtain the exact upper bound ε0 of the singular perturbation parameter ε for which the overall system will remain stable ∀ε∈[0, ε0). The concept of the block bialtern... View full abstract»

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  • Method for optimising set-point weights in ISA-PID autotuners

    Publication Year: 1999, Page(s):137 - 146
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (860 KB)

    The aim of the paper is to address the problem of optimising the set-point weights of an ISA-PID controller automatically. First, the importance of the problem and its consequences on industrial applications are described. Then a framework for studying the effects of set-point weighting in ISA-PID controllers is introduced. Finally, a method and the corresponding procedure for tuning the weights a... View full abstract»

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  • Chattering-free and fast-response sliding mode controller

    Publication Year: 1999, Page(s):171 - 177
    Cited by:  Papers (40)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (576 KB)

    A new chattering-free and fast-response sliding-mode controller with a smooth control law (SMCS) is proposed. Unlike the conventional sliding-mode controller, or sliding-mode controller with boundary layer (SMCB), which obeys the variable-structure control principle by adopting a switching control term, the proposed SMCS uses a continuously varying term instead which takes the distance of the syst... View full abstract»

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  • Neurofuzzy state identification using prefiltering

    Publication Year: 1999, Page(s):234 - 240
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (748 KB)

    A new state estimator algorithm is based on a neurofuzzy network and the Kalman filter algorithm. The major contribution of the paper is recognition of a bias problem in the parameter estimation of the state-space model and the introduction of a simple, effective prefiltering method to achieve unbiased parameter estimates in the state-space model, which will then be applied for state estimation us... View full abstract»

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  • Robust tracking control for constrained robots actuated by DC motors without velocity measurements

    Publication Year: 1999, Page(s):147 - 156
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (700 KB)

    A dynamic feedback control design is proposed to treat the trajectory tracking control for constrained robots actuated by brushed DC motors. Only measurements of both angular motor position and motor armature current are required to construct the hybrid position-force control law. It is shown that for any preassigned attraction region all the variables of the closed-loop system are bounded and dif... View full abstract»

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  • Robustness effects of a prefilter in a Smith predictor-based generalised predictive controller

    Publication Year: 1999, Page(s):179 - 185
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (580 KB)

    The paper describes how to increase the robustness of the Smith predictor-based generalised predictive controller while maintaining a nominal performance. The design of filters to improve robustness has several advantages: it is much simpler than the normal procedure used in generalised predictive controllers; it allows for better robustness indices than the optimal predictor-based GPC with the sa... View full abstract»

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  • Robust nonlinear control and torque ripple reduction for permanent magnet stepper motors

    Publication Year: 1999, Page(s):186 - 196
    Cited by:  Papers (19)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (672 KB)

    Robust adaptive nonlinear control of permanent magnet stepper motors is considered. The control design methodology is based on our earlier work (1997). A controller is designed for a detailed model of the motor that accounts for the cogging torque and nonsinusoidal flux distribution in the air gap and is robust to parametric and dynamic uncertainties in the entire electromechanical system and achi... View full abstract»

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  • General approach to control-configured-plant (CCP) design/redesign

    Publication Year: 1999, Page(s):197 - 203
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (560 KB)

    The performance of a multivariable control system is limited by intrinsic properties (such as right-half-plane poles/zeros and condition number) of a plant, hence a required performance of a control system is achievable only when a plant is properly designed to fit the need of a control engineer. Such a plant is sometimes referred to as an `(input-output) controllable plant', and is referred to as... View full abstract»

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  • Monitoring and diagnosis of multiple incipient faults using fault tree induction

    Publication Year: 1999, Page(s):204 - 212
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (712 KB)

    Presents DE/IFT, a fault diagnosis engine which is based on the authors' IFT algorithm for induction of fault trees. It learns from an examples database comprising sensor recordings, all of which have been classified as corresponding to either the normal behaviour of the system or to one or more fault states. The fault trees generated by IFT are translated into functions in the C programming langu... View full abstract»

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  • Wavelet approach to optimising dynamic systems

    Publication Year: 1999, Page(s):213 - 219
    Cited by:  Papers (20)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (464 KB)

    An examination is given to compare the fast capabilities of operational matrices of integration formed by various orthogonal functions. It is found that the Haar wavelet operational matrix is the fastest. Based on the newly established matrix, a simple and complete procedure for optimising a dynamic system is formulated. Different constraints and various conditions of the time-invariant system opt... View full abstract»

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  • Almost disturbance decoupling of uncertain nonlinear output feedback systems

    Publication Year: 1999, Page(s):220 - 226
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    Addresses the output tracking of a class of uncertain nonlinear output feedback systems affected by disturbances that are known to be bounded but are otherwise unknown. The system uncertainty is parametrised by a parameter vector of which a normed upper bound is known. An adaptive controller is designed to guarantee arbitrary disturbance attenuation on the output tracking error for smooth referenc... View full abstract»

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