摘要
把高压太阳电池阵放入低地球轨道中就会发生电弧放电,造成航天器表面退化、电磁干扰、PN结破坏和其它负作用。文章在阐述电弧放电机理的基础上,介绍了在试验室模拟等离子体环境中进行的两次放电试验。其中一个试验使用的是太阳电池阵物理等效模拟试件,另一个则是真实的太阳电池阵样品。试验得出了两种样品在等离子体环境中的放电位置、放电阈值电压,并发现环境与太阳电池电压及放电率等相关参数的关系。比较两个试验可以看出,在相似的环境下,模拟试件的放电阈值比较大。文章最后对试验现象的发生原因进行了初步的分析。研究LEO等离子体环境与HVSA之间的相互作用,并采取相应的防护措施,是大型空间活动必须解决的关键技术之一。
When a solar array with high voltage is put in low earth orbit, arcing may occur, which causes surface degradation, electromagnetic interference and other undesirable side-effects. This paper first discusses the mechanism of arcing, including two theories and one modified mechanism by Cho and Hastings. Then this paper describes two laboratory arcing experiments, including one simulation sample experiment and one real sample experiment. In the experiments, the ESD positions, the ESD inception threshold, plasma-voltage relation and arc rate-voltage relation of two samples in various environments were determined. And a comparison between the results of two experiments shows that the simulation sample’s ESD threshold is lager in a same plasma environment. At last, based on the experimental results, it is pointed out that the interaction between LEO plasma environment and HVSA, and related preventive measures need to be studied as key technologies in large space activities.
出处
《航天器环境工程》
2006年第6期347-350,共4页
Spacecraft Environment Engineering
