Compound control on electro-hydraulic servo loading test bench

In order to verify and optimize the design process of electro-hydraulic servo system, this paper set up a load-adjustable electro-hydraulic servo load test bench. Base on the structural analysis of test bench, the mathematical models of closed-loop torque and position control are established. After theoretical calculations and model simplification, a compound controller consisting of feedforward control and PID control is designed. Later, this study focused on the torque loop experiment. The correctness and feasibility of the design process can be verified via experiments. Some qualitative conclusions from the test can provide some reference for the similar applications.