Hydraulic cylinder control of injection molding machine based on differential evolution fractional order PID  

基于差分进化分数阶PID的注塑机液压缸控制

作　　者：LI Ya-qiu GU Li-chen YANG Sha XUE Xu-fei 李亚秋;谷立臣;杨莎;薛旭飞(西安建筑科技大学机电工程学院,陕西西安710055)

机构地区：[1]School of Mechatronic Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China

出　　处：《Journal of Measurement Science and Instrumentation》2020年第4期317-325,共9页测试科学与仪器（英文版）

基　　金：National Natural Science Foundation of China(No.51675399)。

摘　　要：Injection molding machine,hydraulic elevator,speed actuators belong to variable speed pump control cylinder system.Because variable speed pump control cylinder system is a nonlinear hydraulic system,it has some problems such as response lag and poor steady-state accuracy.To solve these problems,for the hydraulic cylinder of injection molding machine driven by the servo motor,a fractional order proportion-integration-diferentiation(FOPID)control strategy is proposed to realize the speed tracking control.Combined with the adaptive differential evolution algorithm,FOPID control strategy is used to determine the parameters of controller on line based on the test on the servo-motor-driven gear-pump-controlled hydraulic cylinder injection molding machine.Then the slef-adaptive differential evolution fractional order PID controller(SADE-FOPID)model of variable speed pump-controlled hydraulic cylinder is established in the test system with simulated loading.The simulation results show that compared with the classical PID control,the FOPID has better steady-state accuracy and fast response when the control parameters are optimized by the adaptive differential evolution algorithm.Experimental results show that SADE-FOPID control strategy is effective and feasible,and has good anti-load disturbance performance.

关 键 词：variable speed pump-controlled cylinder fractional order proportion-integration-differentiation(FOPID) self-adaptive differential evolution(SADE) injection molding machine control anti-load disturbance 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]