一种针对积分过程回路的阀门粘滞检测方法  

A Valve Viscosity Detection Method for Integrating Processes

作　　者：江钊 王志国 刘飞 JIANG Zhao;WANG Zhi-guo;LIU Fei(MOE Key Laboratory of Advanced Process Control for Light Industry,Jiangnan University)

机构地区：[1]江南大学,轻工过程先进控制教育部重点实验室

出　　处：《化工自动化及仪表》2020年第1期25-30,共6页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金项目(61773183)。

摘　　要：在传统曲线拟合方法的基础上,提出了一种新的针对积分过程回路的粘滞检测方法。首先,利用累计绝对偏差检测回路中控制偏差信号的有效过零点;再在每个半周期对偏差信号进行曲线拟合;然后根据偏差信号与三角波、正弦波的拟合程度,定义了一个新的粘滞指标确定粘滞是否存在;最后,通过仿真和实际工业数据分析,验证了所提方法的检测准确度和抗干扰能力。Based on the traditional curve fitting method, a new method of viscosity detection for integrating processes loop was proposed. Firstly, having the integral of absolute error(IAE) adopted to detect the effective zero crossing of the control deviation signal in the loop,and then having the curve fitting of the deviation signal carried out in each half cycle and having the degree of fitting deviation signals to the triangular wave and the sine wave considered to define a new viscosity index so as to determine whether the viscosity exists. Finally, simulation and industrial data verified the accuracy and anti-interference ability of the method proposed.

关 键 词：阀门粘滞检测 积分过程 过零点 曲线拟合 粘滞指标 累计绝对偏差 

分 类 号：TH865[机械工程—仪器科学与技术]