Simulation and Implementation of Servo Control System for Electro-hydraulic Hybrid Injection Molding Machine

Abstract

This paper introduces the composition and working principle of the servo control system. Through the modeling of the injection molding machine load, injection cylinder and servo motor drive system, using the SVPWM principle and designing the fuzzy controller, the overall simulation of the servo system is realized. The simulation results show that the permanent magnet synchronous motor servo system has good servo performance, and the fuzzy controller can effectively control the complex injection system. At the same time, the servo control system is built. The test results show that the speed response performance and pressure response performance of fuzzy control are better. The pressure response time is 168ms and the speed response time is 164ms. Both are below 200ms, fully meeting the requirements of high speed and high response of electro-hydraulic hybrid precision injection molding machine. Compared with the PID control, the fuzzy control maintains the set pressure, and the set pressure value can be well tracked, and the error is greatly reduced.