Model of overlapping effect of levitation lunar dust
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摘要: 探月活动中，月表的尘埃会对太阳翼等光电器件的工作效率造成严重影响.基于附着月尘的遮挡模型，从立体空间的角度分析了悬浮月尘对工作器件的遮挡，提出了悬浮月尘的单粒度遮挡模型，利用月尘的平均粒度可计算在指定立体空间内，定量月尘造成的遮挡量；引入月尘的粒度分布函数，提出了悬浮月尘的多粒度遮挡模型，能够计算已知粒度分布函数的月尘在指定立体空间内造成的遮挡量；通过设计悬浮月尘遮挡的仿真实验，分别利用3种不同粒度大小的月尘进行实验，实验数据与悬浮月尘的单粒度、多粒度遮挡模型的理论计算值都较好吻合，实验结果证实了悬浮月尘遮挡模型的正确性与可靠性.Abstract: During lunar exploration program, the dust on the lunar surface has a severe impact on the energy utilization efficiency of photoelectric devices, such as solar panels. Based on the model of adherence dust, the effect of levitation dust was analyzed from the view of stereo space. The model of levitation dust, which had the same diameter, was proposed. With the average diameter of the lunar dust, the quantitative relationship between the levitation density of lunar dust and the energy utilization efficiency could be calculated by this model. Then taking the size distribution of the lunar dust into consideration, the model of multi-granularity levitation dust was built, with which the quantitative relationship between the levitation density of lunar dust and the energy utilization efficiency could be calculated for dust with known distribution. A simulation experimental model of levitation dust was set up and experiments were made thrice with different size distributions. The experimental results are matched well with the theory model of either single particle size dust or multi-granularity dust, which verifies the correctness and the reliability of the proposed model of the levitation dust.
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Key words:
- lunar dust /
- levitation /
- shelter /
- size distribution /
- photoelectric device
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