Single er valve ' s control equation is derived two mathematic models of er valve - cylinder actuator is constructed according to control methods of er valve - cylinder . and a position control system based on er valve - bridge actuator is simulated . the result shows that the system has good dynamic performance 根据电流变阀对液压缸的控制方式，建立了两种由电流变阀控制液压缸组成的电流变阀控系统动力元件的数学模型，并对电流变阀桥路结构式的动力元件组成的阀控位置系统进行了仿真。
