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IEE Proceedings - Control Theory and Applications

Issue 2 • Date Mar 1994

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Displaying Results 1 - 10 of 10
  • Supervisory generalised predictive control and fault detection for multivariable anaesthesia

    Publication Year: 1994, Page(s):70 - 82
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (716 KB)

    S0ingle-input/single-output generalised predictive control (GPC) has been applied successfully to muscle-relaxant anaesthesia in both simulations and clinical trials. This work was extended later to the multivariable case involving simultaneous control of muscle relaxation through EMG measurements, and unconciousness using blood-pressure monitoring in a series of simulation studies. To achieve eve... View full abstract»

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  • Application of state feedback with integral control to pulse-width modulated push-pull DC-DC convertor

    Publication Year: 1994, Page(s):99 - 103
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (292 KB)

    The well-known state feedback with integral control is applied to the multioperating point pulse-width modulated push-pull DC-DC convertor. A new large-signal circuit model of the power stage is modified so that the load resistance is eliminated from the system matrix. Two closed-loop continuous-conduction mode push-pull convertors are designed using a pole-placement technique: (a) a conventional ... View full abstract»

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  • PID controller design for a TITO system

    Publication Year: 1994, Page(s):111 - 120
    Cited by:  Papers (24)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (572 KB)

    The paper presents some approaches for the design of a diagonal proportional-integral-derivative (PID) controller for a two-input two-output (TITO) system. First, a new autotuning procedure is given for a TITO system and from the results of this a design method is developed based on moving the critical point to a desired position on the compensated characteristic loci. Second, an optimisation meth... View full abstract»

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  • GMV technique for nonlinear control with neural networks

    Publication Year: 1994, Page(s):57 - 69
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (768 KB)

    A nonlinear extension of minimum variance and generalised minimum variance control strategies is developed. The plant is modelled with a linear autoregressive part and a nonlinear dependency on the input. A neural network based implementation of the control law is discussed. This results in a nonlinear controller constituted by a few linear blocks complemented with not more than two neural network... View full abstract»

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  • Extension of the covariance control principle to nonlinear stochastic systems

    Publication Year: 1994, Page(s):93 - 98
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (372 KB)

    An approach for the constrained variance control of nonlinear stochastic systems, which uses the theory of covariance control of linear stochastic systems, is proposed. The nonlinear stochastic systems are linearised by the use of describing functions. Two cases of nonlinear systems are considered: zero-mean nonlinear stochastic systems and nonzero-mean nonlinear stochastic systems. The applicatio... View full abstract»

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  • System identification based on closed-loop step response data

    Publication Year: 1994, Page(s):107 - 110
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (264 KB)

    This paper presents a new identification algorithm for processes operating in closed-loop. The algorithm involves fitting two Laguerre models directly to the control signal and the process output signal generated by a step change in the setpoint. The algorithm does not require any prior assumptions about the structure of the process model. The method generates an estimate of the process model in t... View full abstract»

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  • Identification of the SA-330 Puma helicopter

    Publication Year: 1994, Page(s):130 - 136
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (440 KB)

    Identification techniques have been widely used in the rotorcraft community for some time, but despite good progress, difficulties are often encountered, particularly in the estimation of flight mechanics models. Results are presented on the identifiability of a theoretical six degree-of-freedom flight mechanics model of the SA-330 Puma, in particular on the effect of the control axis used, on the... View full abstract»

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  • Sampling-time effects of higher-order digitisations and their applications in digital redesign

    Publication Year: 1994, Page(s):83 - 92
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (552 KB)

    A study is made of the sampling-time effects of higher-order digitisations (i.e. the Madwed and Boxer-Thaler digitisations) to convert a continuous-time system into a discrete-time system. A general expression for the denominator and numerator of the digitised system is proposed, and used to predict precisely the computational stability and sampling-time effects of these types of digitisation. The... View full abstract»

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  • When can the decentralised state feedback be realised as a static output feedback?

    Publication Year: 1994, Page(s):104 - 106
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (140 KB)

    The paper investigates the relationship between the problems of stabilisation with static output feedback and with feedback of the local state vectors, in an interconnected system. A sufficient condition for the stabilisation of system (F, G, H) with the output feedback u=Ly is given. When this condition is satisfied, the decentralised and the output feedback controls are equivalent, and allow rea... View full abstract»

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  • Feedforward time-delay structures in state estimation: finite memory smoothing and continuous deadbeat observers

    Publication Year: 1994, Page(s):121 - 129
    Cited by:  Papers (17)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (480 KB)

    The paper investigates the possibilities of using a feedforward time-delay structure for state estimation and smoothing in linear continuous dynamic systems. A fixed-lag finite-memory smoother and a continuous deadbeat observer are shown to be described by a linear combination of delayed measurements of the system inputs and outputs. To facilitate implementation of the observer-based controllers a... View full abstract»

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