PCM 控制的新型气液位置伺服系统的研究

Study of a new pneumatic-hydraulic position servo system with PCM control

本文提出了一种新型气液缸和气液位置伺服系统。该系统采用气液连动控制，充分发挥液压与气动各自的优点，大大提高了位置控制精度，同时克服单纯气动的缺点。在气液回路上，利用两位三通阀、“ＰＣＭ”阀组及油开关阀实现分区控制和准确定位，解决了快速性和定位精度之间的矛盾，通过分析和实验研究表明，此方案是可行的。

This paper puts forward a new pneumatic-hydraulic cylinder and pneumatic-hydraulic position servo system. The system adopts pneumatic-hydraulic gang control, thus bringing respective advantages of hydraulics and pneumatics into full play, greatly improving position control accuracy and overcoming the shortcoming of using pneumatic alone. It uses three way valve, PCM valves and switch valve in pneumatic-hydraulic circuit to implement zoned control and accurate positioning and to solve the contradition between the rapidity and positioning accuracy. Experiments show that the method is feasible.