Dynamic characteristic research of fast electro-hydraulic actuator based on double switch valves

In order to realize the application of electro-hydraulic actuator under conditions of high speed and heavy load, two mechanical structures based on double switch valves were proposed. Hydraulic system simulation model was established in AMESim and simulation research for dynamic characteristics was performed. The key parameters for electro-hydraulic actuator´s response speed were analyzed, and the theoretical basis was provided for actuator performance optimization. The test bench was set up and the experimental research was performed. Simulation results show that the opening and closing time of piloted operated actuator are reduced by 3ms and 35ms, when compared with the one based on double high speed on/off valves. Experimental results show that the pilot operated actuator prototype opens in 14.8ms and closes in 17.7ms, which can completely meet the application requirements of fast response and heavy load.