新型磁流变液压伺服阀测试系统控制器设计

Design of Controller of Magnetorheological Servo Valve Testing System

新型磁流变伺服阀由磁流变阻尼阀构成,阻尼阀由专用的电流控制器控制,依据电流调节改变磁场强度达到控制阻尼阀中液体阻尼力大小的目的。分析了电流控制器的设计原理,据此基于虚拟仪器技术设计出操作软件,针对电流控制器的特点和技术指标,改变输入电压大小以调节电流控制器的输出电流,在阻尼阀动态工作过程中实时监测输入和输出信号以提供分析数据。实验结果显示,该控制器可使得阻尼阀工作稳定,伺服系统性能达到设计要求。

A controlled magnetorheological servo valve was constructed by some dampers that were control by a current regulator. The current regulator can adjust the damping force of the dampers by changing the magnetic strength through the current regulating. Theory of the current regulator was analyzed and an operation program was constructed by virtual instrument technology. The input voltage was altered to adjust the value of the output current of the current regulator. The input and output signals in the dynamic process of dampers were monitored to provide analysis data by the program. The experimental results show that the dampers work steadily and its performances meet the requirement.