基于LabVIEW的电动伺服阀加载测控系统

针对传统电磁阀电磁滞后等不足,用某型电动伺服阀取代电磁阀以满足姿轨控发动机的高推力、高精度要求。为对其进行半实物仿真测试,基于伺服旋转电机加滚珠丝杠,设计了电动伺服阀综合性能加载测控系统。硬件采用先进的PXI总线搭建,软件采用Lab VIEW作为上位机平台,具体设计了主程序、实时程序及通信方式;为抑制伺服阀的位置扰动并提高加载精度,提出一种前馈位置补偿和力闭环PID控制的方法。实验结果表明:用该系统有效地测试了电动伺服阀承受外载能力及其输出位移精度,且满足"双十指标"。

A Load Measurement and Control System for Electric Servo Valve Based on LabVIEW

In view of the shortcomings of traditional electromagnetic valve,such as electromagnetic lag,an electric servo valve is used to replace the electromagnetic valve to meet the requirements of high thrust and high precision of the attitude and orbit control engine.In order to carry out the hardware in the loop simulation test,a comprehensive performance loading test system was designed based on rotating motor and ball screw.The hardware architecture of the system was built based on PXI bus,and LabVIEW was used to develop the PC software platform.The main program,real-time program and communication mode were designed concretely.In order to suppress the position disturbance of the servo valve and improve the loading accuracy,a feedforward position compensation and force close loop PID control method was proposed.The experimental results show that this system can be used to effectively test the load bearing capacity and displacement output precision of electric servo valve,and the testing results can meet the‘double ten index’.