卫星热真空试验微波开关分子污染防护研究  

Research on Prevention of Molecular Contamination of Microwave Switches in Thermal Vacuum Test for Satellite

作　　者：张洪波[1] 刘天雄[1] 李长江[1] 

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《航天器工程》2011年第5期125-130,共6页Spacecraft Engineering

摘　　要：某型号系列卫星在整星热真空试验中,微波开关因分子污染出现了输出功率下降的异常现象。文章对污染物成分与真空状态运动机理进行了分析,提出了阻断污染物分子传输途径的主动防护措施和阻止污染分子冷凝的被动防护措施,并通过某卫星热真空试验进行了验证。试验结果表明,防护措施有效地减少了进入开关内部的污染量,确保了开关在整个热试验过程中的安全。The output power of microwave switches declines in thermal vacuum test of some satellite due to molecular contamination.This paper firstly analyses the components of contamination molecules and the movement mechanism,and then brings forward the active protection measures of cutting off contamination molecules＇ transfers route and the passive protection measures of preventing contamination molecules condensation on the basis of kinetic theory.The results of thermal vacuum test indicates that molecular contamination that enters the switches is reduced considerably and the switches work without any trouble through the test.

关 键 词：卫星 微波开关 热真空试验 分子污染 防护措施 

分 类 号：V445.1[航空宇航科学与技术—飞行器设计]