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低轨航天器会因太阳帆板接地方式从空间等离子体中收集电荷并产生带电效应影响航天器正常的工作。通过评估空间站100 V太阳电池阵,进而在轨带电效应并对基于等离子体电流收集特性对仿真计算获得的悬浮电位值进行分析,可知其能引起包括交会对接放电、舱外活动电击、太阳电池阵电弧短路以及表面材料退化等问题。为此提出空间站带电效应防护减缓的对策,认为主动发射电子进行悬浮电位的控制是目前最有效的办法,需要电位控制装置具备至少1 A电子束流的发射能力,确保我国空间站任务。
The low-orbit spacecraft will collect the charge from the space plasma due to the solar panel grounding and produce the charging effect to affect the normal operation of the spacecraft. By evaluating the 100 V solar array at the space station and then the on-orbit on-line effects and analyzing the simulated floating potential values based on the plasma current collection characteristics, it can be seen that it can cause problems including rendezvous and docking discharges, Arc short circuit and surface material degradation and other issues. Therefore, the countermeasure to reduce the charging effect of space station is proposed. It is considered that the most effective method for controlling the floating potential by active emission electrons is that the potential control device needs at least 1 A electron beam emission capability to ensure the mission of China’s space station.