Servo-actuator is an important cabin of airborne missile , its working performance in bad temperature environment determines whether the missile can work normally or not .A temperature-field test system based on LabWindows/CVI platform is built, which can test unload and load(70 N・ m) perform-ance of servo-actuator under whole temperature (-50~+75 ℃) .Hardware framework is based on PXI bus technology , and software design adopts multithreading technology .A high-precision and arched elas-tic-loader is designed , and automatical fixation of servo-actuator and automatical loading of torque by pneumatic controller are realized .The results show that this system is stable , practical and high-precision, which meets the development of different servo-actuators.%舵机是空空导弹的一个重要舱段，它在空中恶劣温度环境下的工作性能决定了导弹能否正常工作。因此，搭建了基于LabWindows／CVI平台的舵机温度场测试系统，该系统能够测试舵机在全温（－50～＋75℃）条件下的空载和加载（70 N・ m）性能。硬件架构基于PXI总线技术，软件设计采用多线程技术，设计了高精度的弓字弹性加载器，通过气动控制装置实现舵机的自动装夹和力矩的自动加载。应用结果表明，该系统工作稳定、实用性强、精度高，可用于多种型号舵机的研制工作。
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