Adaptive control of plants using all-zero model for dead-time identification
作者:
S.Roy,
O.P.Malik,
G.S.Hope,
期刊:
IEE Proceedings D (Control Theory and Applications)
(IET Available online 1991)
卷期:
Volume 138,
issue 5
页码: 445-452
年代: 1991
DOI:10.1049/ip-d.1991.0061
出版商: IEE
数据来源: IET
摘要:
In the design of identification algorithms, the dead-time is usually modelled by some form of a polynomial function that adequately approximates the dead-time behaviour over relevant frequency bands.The application of all-zero models for approximation of plant dead-times is discussed. Gain-error criterion is established for a general model, whereas phase-error criterion is presented for first-order approximations. It is shown that if a plant transfer function has lowpass features, it is possible to determine a satisfactory all-zero model for the delay.The modelling technique is applied in a recursive least-squares based identification algorithm. This is used to obtain a delay-model predictor. Adaptive controllers, of thek-incremental predictive type, are set up using the identification results.
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