摘要
泄漏监测是在轨空间站长期可靠运行必须解决的难题,本文开展了方向规用于空间站检漏的应用基础研究。在地面真空实验系统上,用小孔向真空室引入气体模拟空间站泄漏,通过磁力传动系统改变方向规入口法线与小孔中心线夹角模拟与空间站泄漏点的方位,通过调整方向规在刻度尺上的位置模拟与空间站泄漏点的距离。在通过漏孔漏率分布服从余弦定律的条件下,研究结果表明用方向规对可疑泄漏点进行扫描,在一定范围内可确定漏孔位置并估计漏率大小,最后讨论了将方向规用于空间站检漏需要进一步研究解决的相关问题。
A novel technique was developed to simulate on the ground the leak detection and leakspot localization of the space-station. The possible small leak was modeled, approximated, and experimentally simulated. In the ground simula- tion, a small amount of gas was injected into the dedicated vacuum chamber, and the leak spot can be located by measur- ing two variables： the direction from gauge to the leaking spots was estimated by changing the angle letween the gauge in- let normal and the orifice axis with the magnetic force driving unit, and the distaneebetween gauge and the leak spot was evaluated by measuring the gauge position on te fixed bracket with a dividing ruler. Assuming the distribution of the leaked molecules obeys the cosine-law, the simulated results show that the direction gauge is capable of approximately lo- cating the leak spot and evaluating the leak rate by scanning the suspected area. The technical problems to be solved in leak detection of space-station with direction ~au^e were also tentatively discussed.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2013年第12期1174-1178,共5页
Chinese Journal of Vacuum Science and Technology
基金
航天2011年CAST基金项目
关键词
方向规
空间站
检漏
定向分子流
Direction gauge
space station
Leak detection
The direction molecular flow
