摘要
为了研究航天器介质材料在不同接地方式影响下空间电荷的分布情况,运用基于电声脉冲法(PEA)的空间电荷测量装置对辐照过的聚四氟乙烯材料在正面接地、背面接地、双面接地3种不同情况下进行内电荷测量,并从原理上分析了3种接地方式对航天器在复杂空间环境中的影响。结果表明:相同辐照情况下,双面接地时内电场最小,其次是正面接地,对航天器威胁最大的是背面接地,此时厚度为0.35 mm的聚四氟乙烯面板材料的电位达到30 kV,最大电场超过16 MV/m。相关结论可为我国航天器深层充放电防护以及未来研制长寿命的卫星提供重要的参考。
In order to investigate the distribution of space charge in spacecraft dielectric materials under different groun- ding manners, using a measuring device based on the pulse electro-acoustic （PEA） method, we measured the space charge inside irradiated polytetrafluoroethylene （PTFE） under three different grounding conditions, namely, the front, the back, and the double-sided grounding. We also discussed the influences of the different grounding manners on the function of spacecraft immersed in complex space environments theoretically. It is obtained that, in the same irradiation condition, the electric field intensity of the three grounding manners changes from large to small in the order of two-sided grounding, front grounding, and back grounding. Hence, back grounding imposes the most serious threat to spacecraft： a 0.35 mm-thick PTFE plate with back grounding will arouse a peak electric potential about 30 kV and the maximum electric field strength over 17 MV/m. The results can be used as a reference for the deep discharge protection of spacecraft dielectrics and the development of long-life satellites in the future.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2015年第1期346-352,共7页
High Voltage Engineering
基金
国家自然科学基金(51177173)~~
关键词
电声脉冲法
空间电荷
介质深层带电
充放电效应
接地方式
充放电防护
pulse electro-acoustic method
space charge
deep dielectric charge
effects of charge ＆ discharge
grounding manner
protection of charge ＆ discharge
