DocumentCode :
2312508
Title :
Auto-tuning and controller design for unstable time delay processes
Author :
Majhi, S. ; Atherton, D.P.
Author_Institution :
Sussex Univ., Brighton, UK
Volume :
1
fYear :
1998
fDate :
1-4 Sep 1998
Firstpage :
769
Abstract :
A single relay feedback test is used to identify exact model parameters of unstable first order plus delay and second order plus delay transfer functions. It is shown that a limit cycle only exists if the time delay is less than a certain value and that this can be increased by adding PD feedback. A systematic PI-PD and PID controller tuning method, based on standard forms with a variable zero, is developed for unstable processes. The performance of the proposed controllers is shown to be superior to previous methods presented for unstable processes
Keywords :
delay systems; PD controller; PI controller; PID controller; autotuning; identification; relay feedback; state space; unstable time delay processes;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Control '98. UKACC International Conference on (Conf. Publ. No. 455)
Conference_Location :
Swansea
ISSN :
0537-9989
Print_ISBN :
0-85296-708-X
Type :
conf
DOI :
10.1049/cp:19980326
Filename :
728032
Link To Document :
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