Aiming at movement disturbances of steering engine in the ground semi-physical load simulation experiment,an electro-hydraulic load simulation method with flow-pressure coordinated control was proposed,and a scheme of pump-valve combined electro-hydraulic load simulator was proposed.The mathematical model of the system was built around the pump-valve combined electro-hydraulic load simulator.Based on the function-division idea of the pump and valve,the speed servo controller and the force servo con-troller were designed for the pump controlled closed subsystem and the valve controlled subsystem respectively by using the back-step-ping sliding mode controller design method.Through the co-simulation,the feasibility and effectiveness of the proposed technical scheme and control strategy were verified.The results show that the electro-hydraulic load simulation method of flow pressure coordinated control has excellent loading performance,and has a remarkable effect on reducing system power consumption.
关键词
负载模拟/泵阀复合/协调控制/职能分工/反步滑模法
Key words
load simulation/pump-valve combined/coordinated control/function division/back-stepping sliding mode control
维普
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