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IEE Proceedings D - Control Theory and Applications

Issue 1 • Date Jan 1988

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Displaying Results 1 - 19 of 19
  • Are we in control? (control engineering in higher education)

    Publication Year: 1988, Page(s):1 - 15
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1564 KB)

    The term 'control' is used in a wide variety of contexts. In the sense that it is used in engineering it usually implies 'feedback control' and all control systems are judged by some criteria of performance. The criteria of performance of the work in control engineering departments of higher educational establishments are not only its academic interest and value but also the usefulness of the work... View full abstract»

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  • Quantitative design of robust multivariable control systems

    Publication Year: 1988, Page(s):57 - 66
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (732 KB)

    By a systematic use of the theory of non-negative matrices, and the associated theory of M-matrices, it is possible to derive measures of robustness which overcome the undue conservatism inherent in the use of singular values as measures of robustness for particular types of structured perturbations. Using these ideas, it is shown that for nominal diagonal closed loop transfer matrices, the contro... View full abstract»

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  • Weighted input predictive controller

    Publication Year: 1988, Page(s):16 - 20
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (452 KB)

    A discrete-time algorithm is presented which is based on a predictive control scheme in the form of dynamic matrix control. A set of control inputs are calculated and made available at each time instant, the actual input applied being a weighted summation of the inputs within the set. The algorithm is directly applicable in a self-tuning format and is therefore suitable for slowly time-varying sys... View full abstract»

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  • Determination of weighting polynomials in generalised minimum variance controllers

    Publication Year: 1988, Page(s):21 - 27
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (559 KB)

    For a generalised minimum variance controller algorithm the weighting polynomials are calculated in such a way as to assign the closed-loop poles of the system and to reduce the output and control signals variances. This technique is based on the fact that the pole-assignment equation may have multiple solutions if the weighting polynomials are not of minimal order. By increasing the order of thes... View full abstract»

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  • Connection between continuous and discrete Riccati equations with applications to Kalman filtering

    Publication Year: 1988, Page(s):28 - 34
    Cited by:  Papers (28)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (591 KB)

    The aim of the paper is to explore the relationship between the continuous-time Ricatti equation and the corresponding discrete-time equation with fast sampling. The interconnection is established by formulating the discrete case using delta operators. The application of these results to the Kalman filtering problem highlights the importance of analogue prefiltering in the sampling process. A seco... View full abstract»

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  • Adaptive controller for a turbogenerator system

    Publication Year: 1988, Page(s):35 - 42
    Cited by:  Papers (20)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (541 KB)

    Describes the derivation, design and evaluation of a parameter-adaptive integrated controller for a turbogenerator. The control strategy is to minimise the variances between the outputs of the turbogenerator and the outputs of a linear optimal predictor under all operating conditions. The design of the controller is based on an autoregressive moving-average model, and does not require any informat... View full abstract»

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  • Multivariable self-tuning control with decoupling for robotic manipulators

    Publication Year: 1988, Page(s):43 - 48
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (510 KB)

    Presents two self-tuning control schemes for robotic manipulators, based on two canonical multivariable difference models. The controllers are designed such that the variances of generalised cost functions are minimised and the controller parameters are directly estimated. The weighting factors in the cost function can be prespecified in such a form that the manipulator system is decoupled and clo... View full abstract»

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  • Cascade adaptive speed control of a thyristor-driven DC motor

    Publication Year: 1988, Page(s):49 - 55
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (645 KB)

    A cascade speed control strategy for a thyristor driven DC motor subjected to parameter variations is proposed. A dual mode adaptive inner current loop is cascaded with a model reference adaptive speed control loop. The scheme is implemented in a 16 bit microcomputer using a floating point coprocessor. Tests on a DC machine have been conducted. The proposed solution guarantees a stable and predefi... View full abstract»

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  • On the improvement of an adaptive observer for multi-output systems

    Publication Year: 1988, Page(s):67 - 71
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (393 KB)

    The paper proposes a design for an adaptive observer for multivariable systems and considers possible improvements for the identification of the unknown parameters. An orthogonalised projection algorithm which provides good convergence is described for identifying the unknown parameters of an aircraft. An adaptive observer which does not identify the plant's initial state vector is also presented.... View full abstract»

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  • Are we in control?

    Publication Year: 1988
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2167 KB)

    The term `control¿¿ is used in a wide variety of contexts. In the sense that it is used in engineering it usually implies `feedback control¿¿, and all control systems are judged by some criteria of performance. The criteria of performance of the work in control engineering departments of higher educational establishments are not only its academic interest and value but also the usefulness of the w... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Weighted input predictive controller

    Publication Year: 1988, Page(s):16 - 20
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (553 KB)

    In the paper, a discrete-time algorithm is presented which is based on a predictive control scheme in the form of dynamic matrix control. A set of control inputs are calculated and made available at each time instant, the actual input applied being a weighted summation of the inputs within the set. The algorithm is directly applicable in a self-tuning format and is therefore suitable for slowly ti... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Determination of weighting polynomials in generalised minimum variance controllers

    Publication Year: 1988, Page(s):21 - 27
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (690 KB)

    For a generalised minimum variance controller algorithm the weighting polynomials are calculated in such a way as to assign the closed-loop poles of the system and to reduce the output and control signals variances. This technique is based on the fact that the pole-assignment equation may have multiple solutions if the weighting polynomials are not of minimal order. By increasing the order of thes... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Connection between continuous and discrete Riccati equations with applications to kalman filtering

    Publication Year: 1988, Page(s):28 - 34
    Cited by:  Papers (24)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (735 KB)

    The aim of the paper is to explore the relationship between the continuous-time Riccati equation and the corresponding discrete-time equation with fast sampling. The interconnection is established by formulating the discrete case using delta operators. The application of these results to the Kalman filtering problem highlights the importance of analogue prefiltering in the sampling process. A seco... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive controller for a turbogenerator system

    Publication Year: 1988, Page(s):35 - 42
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (671 KB)

    The paper describes the derivation, design and evaluation of a parameter-adaptive integrated controller for a turbogenerator. The control strategy is to minimise the variances between the outputs of the turbogenerator and the outputs of a linear optimal predictor under all operating conditions. The design of the controller is based on an autoregressive moving-average model, and does not require an... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multivariable self-tuning control with decoupling robotic manipulators

    Publication Year: 1988, Page(s):43 - 48
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (637 KB)

    The paper presents two self-tuning control schemes for robotic manipulators, based on two canonical multivariable difference models. The controllers are designed such that the variances of generalised cost functions are minimised and the controller parameters are directly estimated. The weighting factors in the cost function can be prespecified in such a form that the manipulator system is decoupl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cascade adaptive speed control off a thyristor-driven DC motor

    Publication Year: 1988, Page(s):49 - 55
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (801 KB)

    A cascade speed control strategy for a thyristor driven DC motor subjected to parameter variations is proposed. A dual mode adaptive inner current loop is cascaded with a model reference adaptive speed control loop. The scheme is implemented in a 16 bit microcomputer using a floating point coprocessor. Tests on a DC machine have been conducted. The proposed solution guarantees a stable and predefi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Book review: Modern Control Engineering

    Publication Year: 1988, Page(s):55 - 56
    IEEE is not the copyright holder of this material | PDF file iconPDF (375 KB)
    Freely Available from IEEE
  • Quantitative design of robust multivariable control systems

    Publication Year: 1988, Page(s):57 - 66
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1093 KB)

    By a systematic use of the theory of non-negative matrices, and the associated theory of M-matrices, it is possible to derive measures of robustness which overcome the undue conservatism inherent in the use of singular values as measures of robustness for particular types of structured perturbations. Using these ideas, it is shown that for nominal diagonal closed loop transfer matrices, the contro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the improvement of an adaptive observer for multi-output systems

    Publication Year: 1988, Page(s):67 - 71
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (479 KB)

    The paper proposes a design for an adaptive observer for multivariable systems and considers possible improvements for the identification of the unknown parameters. An orthogonalised projection algorithm which provides good convergence is described for identifying the unknown parameters of an aircraft. An adaptive observer which does not identify the plant's initial state vector, and which differs... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.