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Title: Automatic tuning of gain-scheduled control for asymmetrical processes
Authors: Tan, K.K. 
Wang, Q.-G. 
Lee, T.H. 
Gan, C.H.
Keywords: Asymmetrical processes
Gain scheduling
Process identification
Relay auto-tuning
Issue Date: Nov-1998
Source: Tan, K.K.,Wang, Q.-G.,Lee, T.H.,Gan, C.H. (1998-11). Automatic tuning of gain-scheduled control for asymmetrical processes. Control Engineering Practice 6 (11) : 1353-1363. ScholarBank@NUS Repository.
Abstract: This paper presents an automatic tuning procedure for gain-scheduled control of asymmetrical processes. A modified relay feedback is employed to obtain a frequency response estimation for the dual dynamics of the asymmetrical process, where a novel gain-matching and frequency-matching method is developed to correct an asymmetry phenomenon associated with the oscillations induced from a direct application of basic relay feedback. Based on the frequency response estimation and a closed-loop identification of the process gain, two first-order transfer function models are fitted to the process. Subsequently, a gain-scheduled PI control can be tuned according to the process models, so that the compensated system satisfies user-specified gain and phase margin requirements. Simulation examples are provided for illustration. © 1998 Published by Elsevier Science Ltd. All rights reserved.
Source Title: Control Engineering Practice
ISSN: 09670661
Appears in Collections:Staff Publications

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