Trajectory Tracking Control of Injection Molding Cylinder Driven by Speed Controlled Hydraulic Pump

속도제어-유압펌프에 의하여 구동되는 사출성형 실린더의 궤적추적제어

This paper deals with the issue of trajectory tracking control of a clamping cylinder for injection moulding machine, which is directly driven by speed controlled hydraulic pump in combination with AC servomotor. As a fundamental step prior to tracking controller design, feedback control system is developed by implementing a position control loop parallel with a system pressure control loop. A sliding mode controller combining velocity feedforward scheme is developed for enhancing the tracking performance. Consequently a significant reduction in tracking error is achieved for both position and pressure control applications.