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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 study the distribution of space charge under the influence of different grounding modes, space charge measurement device based on electroacoustic pulse method (PEA) was used to irradiate the irradiated PTFE material in the front ground, back ground, double Surface-grounded three kinds of internal charge measurement under different circumstances, and from the principle analysis of three kinds of grounding on the spacecraft spacecraft in complex environments. The results show that under the same irradiation conditions, the internal electric field is the smallest when grounding two sides, followed by the front grounding. The most threatening to the spacecraft is the back grounding. When the thickness of the 0.35 mm PTFE panel reaches 30 kV , The maximum electric field exceeds 16 MV / m. The relevant conclusions can provide important reference for the deep charge and discharge protection of spacecraft in our country and the development of long-lived satellites in the future.