In the process industry, it is crucial
to ensure safety, high product
quality, strict environmental compliance, and optimum economics. Among
other important factors, this calls for high performance of the control
loops. One of the main root causes for poor performance is control
valve malfunctions. In particular, stiction is a long-standing valve
problem in the process industry, causing limit cycles with a negative
impact on process performance. Therefore, it is important to detect
this phenomenon as early as possible, to distinguish it from other
oscillation causes, to determine the correct maintenance measures,
and, if applicable, to apply proper stiction compensation. The present
survey covers the field of stiction modeling, detection, and compensation,
encompassing main research directions and significant contributions
that have been reported in the literature. The relationship among
different approaches is outlined showing their strengths and weaknesses.
The review is complemented with a description of academic and commercial
software packages that incorporate stiction diagnosis. Finally, a
view on possible future research directions is provided.
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