Analysis and simulation of fast electro-hydraulic actuator

The performance of high speed electro-hydraulic actuator applied to piston variable displacement compressor was analyzed.According to the slow response of electro-hydraulic actuator driven by single high speed on/off valve,which was leaded by the restrained volume of high speed on-off valve,the solution that using a high speed on-off valve as the pilot valve and a secondary valve as the distributing valve was presented.The simulation results indicate that the high speed electro-hydraulic actuator response time fit practical work conditions.At the same time,the pilot structure of high speed electro-hydraulic actuator makes it possible to control open-close of distributing valve only by exporting one on/off signal on the high speed on/off valve.This solution improves system stability,decreases number of electro-valves,compared with multi-valve control method.