The practical application of electro-hydraulic servo system requires simultaneous control of position and pressure,such as rolling shear,leverller,hydraulic presses and other forming machines.The traditional valve control system has fast response,high accuracy and low energy efficiency,while the traditional pump control system has slow response,low accuracy and high energy efficiency.In this paper,the parallel pump-valve drive circuit pro-posed by the group is applied to the position-pressure hybrid control system,and an impedance control scheme is proposed for the shock phenomenon in the switching process of position control and pressure control,which takes position control as the inner loop and pressure control as the outer loop.The simulation shows that the scheme elim-inates the shock in the switching process of position and pressure,realizes the simultaneous control of position and pressure,and has good control performance for different desired pressure and desired position under different loads.
关键词
泵阀并联驱动回路/位置压力复合控制/阻抗控制
Key words
pump and valve parallel drive circuit/position and pressure hybrid control/impedance control
维普
万方数据