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Detection of valve stiction in integrating processes
KTH, School of Electrical Engineering (EES).
2001 (English)In: 2001 European Control Conference, ECC 2001, IEEE conference proceedings, 2001, 1327-1332 p.Conference paper (Refereed)Text
Abstract [en]

A simple method for detection of static friction (stiction) in control valves was presented in [6]. However, that method cannot be used for control loops with integrating processes. This paper presents a new method to handle these cases. The main idea is to detect abrupt changes (which are typical in the case of stiction) in the loop output. This is done by considering the probability distribution of the second derivative. In the stiction case the distribution is close to Gaussian, otherwise it will have two peaks.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2001. 1327-1332 p.
Keyword [en]
process control, Process supervision, signal processing, statistical fault diagnosis, Fault detection, Probability distributions, Statistical process control, Stiction, Control loop, Gaussians, In-control, Integrating process, Second derivatives, SIMPLE method, Static friction
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-181625ScopusID: 2-s2.0-84947475464ISBN: 9783952417362OAI: oai:DiVA.org:kth-181625DiVA: diva2:909061
Conference
6th European Control Conference, ECC 2001, 4 September 2001 through 7 September 2001
Note

QC 20160304

Available from: 2016-03-04 Created: 2016-02-02 Last updated: 2016-03-04Bibliographically approved

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Isaksson, Alf J.
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