大型空间环模试验设备研制

Development of China's Large-Sized Space Environmental Simulation Test Facility

大型空间环模试验设备主要用于为卫星、飞船、探月飞行器的整星真空热试验与大尺寸天线真空低温环境下展开试验提供高真空、全吸收的冷黑背景及空间热辐射环境。该系统设计配备了外热流模拟测控系统、无油真空系统、真空罐、中央控制系统、热沉、氮系统等组成部分。本文概要介绍了本空间环模试验设备的主要性能指标、系统组成以及主要参数设计。

The large-sized space environmental simulation test facilitywas developed,capable of simulating the space environment of high vacuum,cryogenic-black background and space heat-flux,to perform the vacuum thermal test of satellite,spacecraft and lunar lander and test of large-sized antenna at low temperature in vacuum. The facility mainly consisted of a combination of large-sizedvertical / horizontal vacuum chamber,oil-free pumping sub-system,central measurement and control unit,thermal shroud,and nitrogen supply,external flux simulation unit and data acquisition and analysis unit. The technical specifications include： a base pressure of 8 × 10^（-6）Pa,an average temperature of 90 ± 2K on heat sink surfaces,control precision of test temperature 〈± 0. 5 K,control accuracy of heatflux ± 2%,measured contamination of volatile condensable materials well below 1 × 10^（-7）g / cm^2. The China＇s space projects,including but not limited to the lunar orbiter,dark matter satellite,have been successfully completed with the space environmental simulation facility.