Detection and diagnosis of oscillations in control loops

TitleDetection and diagnosis of oscillations in control loops
Publication TypeConference Paper
Year of Publication1996
AuthorsTaha, O., G. A. Dumont, and M. S. Davies
Conference NamePROCEEDINGS OF THE 35TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-4
Pagination2432-2437
PublisherIEEE Control Syst Soc; Soc Instrument & Control Engineers; Inst Syst Control & Informat Engineers; Soc Ind & Appl Math; Operat Res Soc Amer
Conference Location345 E 47TH ST, NEW YORK, NY 10017
ISBN Number0-7803-3591-0
Keywordscontrol valve, Diagnosis, friction, loop monitoring, oscillation
Abstract

In this paper, we will present an automatic procedure for diagnosis of oscillations in control loops. This procedure is one of the features of a `'Control Loop Performance Monitoring'' (CLPM) system under development, and works on-line without disturbing normal plant operation. When an oscillating control loop is detected, the diagnosis tools allow the determination of the cause of the oscillating behavior. It could be high friction in the control valve, a poorly tuned controller or the presence of an external perturbation.

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