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IEE Proceedings D - Control Theory and Applications

Issue 6 • Nov. 1990

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Displaying Results 1 - 9 of 9
  • Robust variable structure control of model reference systems

    Publication Year: 1990, Page(s):341 - 348
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (635 KB)

    A variable structure control system (VSCS) yields total or selective invariance to system parameter variations and disturbances when in the sliding mode. In order to prescribe the system performance, a model-following approach to VSCS design is used. The required behaviour is achieved by defining a model with ideal response characteristics, and a VSCS is designed so that the error between the plan... View full abstract»

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  • Adaptive estimation of bioactivities in the activated sludge process

    Publication Year: 1990, Page(s):349 - 356
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (700 KB)

    In biotechnical processes the availability of real-time information about the biological activity is of crucial importance, and this is represented by the oxygen uptake rate. The aim of the paper is to design and evaluate a real-time estimator both for this quantity and for the related oxygen transfer coefficient. The design is based on linear approximations of these unknown variables and nonlinea... View full abstract»

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  • Robust coefficient estimation of Walsh functions

    Publication Year: 1990, Page(s):357 - 363
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (500 KB)

    An iterative least squares method with modified residuals is presented which is dedicated to the robust coefficient estimation of Walsh functions for time series contaminated with noise, some of which may even be outliers. Instead of the mean-square approximation error (MSE), a robust criterion is proposed for estimating the coefficients of the time series. It is minimised by applying the ordinary... View full abstract»

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  • Fast-model predictive control of multivariable systems

    Publication Year: 1990, Page(s):364 - 366
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    Extends a simplified fast-model predictive control technique to a multivariable system. The strategy is based on identifying drive combinations which will maximise the time at which predicted variables are 'offside' having a sign which opposes that of the drive signal. It is relevant to systems such as multi-axis robot configurations, in which each variable can be associated with an input which do... View full abstract»

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  • An expert systems approach to controller design

    Publication Year: 1990, Page(s):367 - 373
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (610 KB)

    Describes how an expert system has been used to build an intelligent interface to a CACSD technique for the design of linear controllers. This combination allows the design to be specified in terms of time and frequency domain constraints on the closed-loop transfer functions, and provides the designer with assistance in formulating a reasonable specification and in dealing with constraint conflic... View full abstract»

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  • Improved temperature and humidity control using H/sub infinity / synthesis

    Publication Year: 1990, Page(s):374 - 380
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (474 KB)

    A novel way of tackling the problem of discontinuity and efficiency in air conditioning control is presented. The controller is split for two different conditions of operation, and the design in each case is carried out using H/sub infinity / techniques which allows for frequency response specification of the input and output variables that, ultimately, leads to a solution of the discontinuity pro... View full abstract»

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  • Design technique for a SISO system with uncertain nonminimum-phase plant

    Publication Year: 1990, Page(s):381 - 384
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (297 KB)

    A design technique for a single-input/single-output system with nonminimum-phase plant and large parameter variations is developed. The uncertain part is transformed into a disturbance form and the problem becomes one of attenuating the external disturbance. This method gives a much simpler design procedure.<> View full abstract»

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  • Modelling a class of nonlinear systems

    Publication Year: 1990, Page(s):385 - 389
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (358 KB)

    Discusses the modelling of nonlinear single-input single-output systems using a modified least-squares technique. A locally linear autoregressive moving-average model is constructed from past data, valid about the current state of the system. Weighting is applied to the past data, collected during the learning phase, according to the state-space distance between the current state and each past sta... View full abstract»

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  • Co-ordinated path tracking by two robot arms with a noninverting algorithm based on the simplex method

    Publication Year: 1990, Page(s):390 - 396
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (484 KB)

    Presents an algorithm for path tracking of two robot arms with end-effectors holding a common inertial load. The path is generated as a sequence of elementary motions. Each new position is defined as a function of the previous one. Holonomic constraints are imposed. The characteristic feature of the present algorithm is that it avoids singularities, because there is no need to use inverse kinemati... View full abstract»

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Aims & Scope

Published from 1980-1993, IEE Proceedings D contained significant and original contributions on control theory and its applications. It was devoted to control systems in the broadest sense, covering new theoretical results and the applications of new and established control methods.

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