航天器单机机箱内部压力变化规律探析  

Experimental study of pressure changes inside the unit case of spacecraft electronic products

作　　者：王志浩[1] 冯伟泉[2,1] 周岭[3] 徐焱林[1] 刘业楠[1] 聂翔宇[1] 张永泰[1] 侯清锋[4] 

机构地区：[1]北京卫星环境工程研究所,北京100094 [2]可靠性与环境工程技术重点实验室,北京100094 [3]北京空间飞行器总体设计部,北京100094 [4]北京控制工程研究所,北京100190

出　　处：《航天器环境工程》2013年第2期176-178,共3页Spacecraft Environment Engineering

基　　金：中国航天科技集团公司共性工艺课题

摘　　要：航天电子产品在低气压环境下容易发生放电,导致电磁干扰、产品损坏甚至灾难性事故。为确定单机机箱内部压力在轨变化趋势和特点,文章以航天器典型单机机箱为研究对象,首先计算分析了机箱内部压力随时间的变化规律;然后利用特殊工装实际测量了置于真空容器内机箱的内部压力变化。理论计算结果与试验实测结果符合性较好。该研究能够为单机机箱设计、低气压放电防护及评估提供依据和指导。Discharge could easily happen in a low pressure environment for electronic products onboard a spacecraft, to induce electromagnetic interference, product damages, and even catastrophic accidents. To determine the changes and the pressure variations inside a unit case, the pressure is analyzed and calculated. Then, using a special self-developed device, the pressure in the unit case is measured in a vacuum chamber. The calculation results and the measuring results are in good agreement, which may provide some guidance for the design of the unit case, the protection against low-pressure discharge and the evaluation.

关 键 词：单机机箱 压力变化 低气压放电 计算分析 试验研究 

分 类 号：V44[航空宇航科学与技术—飞行器设计] V416.5