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Title: A novel relay auto-tuning technique for processes with integration
Authors: Ho, W.K. 
Feng, E.B. 
Gan, O.P.
Keywords: Integration
Process identificaton
Proportional plus integral plus derivative controllers
Self-tuning control
Issue Date: Jul-1996
Citation: Ho, W.K., Feng, E.B., Gan, O.P. (1996-07). A novel relay auto-tuning technique for processes with integration. Control Engineering Practice 4 (7) : 923-928. ScholarBank@NUS Repository.
Abstract: In this paper a novel idea of inserting a differentiator in front of the relay is presented. This technique is applicable to a process with integration. The advantage is that the time taken for the relay experiment can be shortened by as much as 100%. A special case of an asymmetrical relay - relay with DC bias - is also analysed. This paper shows that a common process model used in the industry - the first-order plus dead-time process model - can be obtained from the oscillation produced by the relay with DC bias. Once a process model is obtained, many controller design techniques are available. The techniques described in this paper were successfully implemented in a laboratory experiment on a tank level system.
Source Title: Control Engineering Practice
ISSN: 09670661
DOI: 10.1016/0967-0661(96)00090-1
Appears in Collections:Staff Publications

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