Novel Closed-loop Stiction Detection and Quantification Method via System Identification

In this paper, a novel detection and quantification method of control valve stiction is discussed. A time delay e stimation method is presented for processes under an oscillati ng state. A suitable model structure of valve stiction is chose n prior to conducting valve stiction detection and quantification. Given the stiction model structure, a bounded search space of a stiction model is defined and a constrained optimization problem is performed. The validity of the proposed method is illustrated through industrial examples.

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