Experimental study for discharge effect of hypervelocity impact on solar array
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摘要: 随着空间碎片的日益增多，在轨运行航天器的高压太阳电池阵受到空间碎片撞击的影响需要得到评估。通过二级轻气炮加载弹丸，应用Langmuir三探针和电流、电压探针对空间用硅太阳电池阵在不同碰撞速度下产生的放电效应进行了实验研究。结果表明，空间碎片撞击太阳电池阵会诱发产生放电现象，撞击过程产生的高浓度等离子体是放电现象产生的诱因，且碰撞速度越大，对太阳电池阵产生的损伤越严重。Abstract: As the increasing quantity of space debris has become a great hazard to the high-voltage solar array of the spacecraft in orbit, there is a more urgent need to evaluate the discharge effect of hypervelocity on the solar array as a result of the impact by space debris. In this paper, using projectiles loaded by a two-stage light gas gun, and employing the Langmuir triple probe and the probes of the current and the voltage, we explored the discharge effect on the space solar array at different impact velocities. Results showed that the impact may give rise to solar array discharge, which is induced by high density plasma generated by the impact, and that the increasing impact velocities can lead to more serious damage to the solar array.
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Key words:
- mechanics of explosion /
- discharge /
- hypervelocity impact /
- solar array /
- space debris /
- plasma
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