高技术通讯2024，Vol.34Issue(4)：406-412,7.DOI:10.3772/j.issn.1002-0470.2024.04.008
基于S函数的调节阀粘滞特性检测方法
Stiction detection method of control valve based on S function
摘要
Abstract
Oscillations caused by the viscous characteristics of pneumatic control valves are the most common source of deterioration in the performance of industrial control loops.Although there are many methods to detect the viscosity characteristics of control valves,the complexity or defects of these methods limit their specific application in practi-cal working conditions.This paper proposes a new method for detecting the viscous fault of the regulating valve in the process control loop.The proposed method compares the change trend of controller output(OP)and process variable(PV)(ΔPV)in the phase plane diagram with the standard S function,calculates the correlation coeffi-cient according to the difference between the actual function trend and the standard S function,and can specifically determine whether there is viscosity characteristics in the control valve through the value of the correlation coeffi-cient.The proposed method is analyzed and experimented by simulation examples and actual industrial data,and its effectiveness is verified.关键词
调节阀/相关系数/S函数/粘滞检测Key words
control valve/correlation coefficient/S function/stiction detection引用本文复制引用
李世伟,尚群立..基于S函数的调节阀粘滞特性检测方法[J].高技术通讯,2024,34(4):406-412,7.基金项目
国家科技重大专项(2018ZX06005002)资助项目. （2018ZX06005002）
