注射机中不稳定时滞对象的PI-PD控制器设计研究  

Design and Research of PI-PD Controller for Unstable Object with Time Delay in Injection Molding Machine

作　　者：张玥 张辉[1] 刘晓燕[1] ZHANG Yue;ZHANG Hui;LIU Xiao-yan(Hebei Jiaotong Vocational and Technical College,Shijiazhuang 050035,China)

机构地区：[1]河北交通职业技术学院,河北石家庄050035

出　　处：《塑料科技》2020年第8期80-83,共4页Plastics Science and Technology

摘　　要：针对注射机在运行过程中存在不稳定的时滞对象问题,提出一种基于改进的WGC方法实现的PI-PD控制系统。确定一个封闭的稳定区域,计算出凸稳定区域的中心,确定PI-PD控制器参数。该方法精确、计算量小且能保证系统稳定性。仿真案例表明,该方法优于现有的几种方法,能够快速达到稳定状态,可有效地抵抗参数扰动和负载扰动。Aiming at the problem of unstable time-delay objects during the operation of the injection machine,a PI-PD control system based on the improved WGC method is proposed.First determine a closed stable area,calculate the center of the convex stable area,and determine the PI-PD controller parameters.This method is accurate,has a small amount of calculation and can ensure system stability.The simulation case shows that this method is superior to several existing methods,can quickly reach a steady state,and can effectively resist parameter disturbance and load disturbance.

关 键 词：注射机 不稳定时滞对象 PI-PD控制器 WGC方法 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]