模糊变隶属度函数在阀门定位器控制中的应用  

Application of Fuzzy Variable Membership Function in Valve Positioner Control

作　　者：吴凤民[1] 拓万兵[1] WU Feng-min;TUO Wan-bing(China University of Mining and Technology Yinchuan College,School of Information Engineering,Yinchuan Ningxia 750021,China)

机构地区：[1]中国矿业大学银川学院信息工程学院,银川宁夏750021

出　　处：《机械设计与制造》2022年第6期88-91,共4页Machinery Design & Manufacture

基　　金：宁夏高等学校科研项目(NGY2018-263)。

摘　　要：针对调节阀由于摩擦力、不平衡力等引起的时变、非线性特性,以AVP100阀门定位器为研究对象,根据输出电压及电压变化趋势,利用模糊控制智能权函数分别对偏差e及偏差变化ec加权,设计了一种基于变隶属度函数的阀门定位器模糊控制算法。搭建实验平台,对阀门开度从全开到全闭的区间,以间隔10%的开度为变化,分别利用PID参数控制法和设计的变隶属度函数模糊控制算法控制系统,结果显示:用变隶属度函数模糊控制算法控制系统,在不同开度下控制精度均提高、响应加快、过程平稳。According to time-varying and nonlinear characteristic of the regulator caused by frictional force and unbalanced force,the intelligent weight function fuzzy control weighting respectively for deviation e and deviation change ec were used in AVP100 valve positioner on account of the output voltage and the voltage change trend. The fuzzy control algorithm based on the variable membership function of the valve positioner was designed.Finally,the experimental platform was set up.Between the interval of valve opening from full open to full closed,PID parameter control method and the designed variable membership fuzzy control algorithm are respectively used to control the system with the opening of the interval of 10% as the change.The experimental results show that the control precision、response speed、smooth process of the system were all improved under different opening when using variable membership fuzzy control algorithm.

关 键 词：AVP100阀门定位器 加权推理决策 模糊智能权函数 变隶属度函数 

分 类 号：TH16[机械工程—机械制造及自动化] TP301.6[自动化与计算机技术—计算机系统结构]