The method based on the calculation of areas before and after the peak of an oscillating signal
نویسندگان
چکیده
Stiction in control valve is one of the long-standing and common problems in the process industries, which accelerates equipment wear and even affects the stability of closed-loop systems. A valve stiction model is proposed to describe the dynamic feature of sticky valve. To detect and quantify valve stiction, a bootstrap Hammerstein system identification procedure is proposed. Through the identified set of the model parameters and operation plant data, the parameter confidence intervals can be predefined and the valve stiction can be easily detected. Numerical examples are provided to illustrate the effectiveness of the proposed method.
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