CALCULATION OF THE UPPER BOUND OF NEGATIVE POTENTIALS OF SPACECRAFTS IN A GEOSTATIONARY ORBIT BY USING THE LOCAL CURRENT BALANCE MODEL
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摘要: 本文采用局部电流平衡模型,在无光照条件下,对不同表面材料、不同几何形体的航天器充电情况进行了计算.计算得到的最大负电位代表在同步轨道上飞行的航天器充电时可能达到的最坏情况.计算还得到某些航天材料可能出现多重带电的现象.Abstract: In this paper, by using the local current balance model, the charging magnitudes of electrically-isolated, shaded surfaces of a spacecraft are calculated for different shapes and materials. The upper limits of the negative floating potentials calculated are the representations of the "worst case" of spacecraft charging in a geostationary orbit. The calculations also indicate that a multiple floating potential phenomenon for some materials of spacecraft may occur.
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Key words:
- Spacecraft charging /
- Local current balance model /
- Numerical calculation
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