Curve Fitting for Detecting Valve Stiction

Q. Peter HE, S. Joe QIN

Research output: Book Chapters | Papers in Conference ProceedingsBook ChapterResearchpeer-review

1 Citation (Scopus)


In this chapter, a curve-fitting method is introduced for detecting valve stiction. It is assumed that the loop in question is known to be oscillating by using any of the oscillation detection methods presented in Chap. 4. The stiction-detection method is based on the curve-fitting results of the output signal of the first integrating component located after the valve, i.e. the controller output for self-regulating processes or the process output for integrating processes. In this chapter, we answer important questions such as which signal should be looked after, and why that signal takes a certain shape in the presence of valve stiction. A metric referred to as the stiction index (SI), is introduced based on the proposed method to facilitate the automatic detection of valve stiction. The effectiveness of the proposed method is demonstrated using both simulated and real industrial data sets.
Original languageEnglish
Title of host publicationDetection and Diagnosis of Stiction in Control Loops : State of the Art and Advanced Methods
EditorsMohieddine JELALI, Biao HUANG
Number of pages15
ISBN (Electronic)9781848827752
ISBN (Print)9781848827745
Publication statusPublished - 2010
Externally publishedYes

Publication series

NameAdvances in Industrial Control
PublisherSpringer International Publishing
ISSN (Print)1430-9491
ISSN (Electronic)2193-1577


Dive into the research topics of 'Curve Fitting for Detecting Valve Stiction'. Together they form a unique fingerprint.

Cite this