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Adaptive control of dominant time delay systems via polynomial identification

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3 Author(s)
Besharati Rad, A. ; Dept. of Electr. Eng., Hong Kong Polytech., Kowloon, Hong Kong ; Tsang, K.M. ; Lo, W.L.

An adaptive algorithm for controlling systems with dominant time delay is presented. The algorithm is derived by integration of Hagglund's predictive PI (PIP) controller with the online polynomial identification algorithm. For the purpose of identification and control, the system under control is modelled by a first-order with delay model and its parameters, including the time delay, are identified. The identified parameters are used to tune the predictive PI controller. The performance of this algorithm is verified by an experimental study for a system with variable time delay. It is also shown that this controller performs better than the popular Foxboro's EXACT controller for a dominant time delay process

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Control Theory and Applications, IEE Proceedings -  (Volume:142 ,  Issue: 5 )