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针对太阳电池正偏置工作电压和玻璃盖片表面负电位产生的势垒及其对低轨道航天器绝对带电的影响。本文首先基于轴对称模型结构分析了电池间隙裸露导体尺寸对太阳电池势垒效应的影响。研究结果表明,太阳电池势垒效应随着电池裸露导体尺寸增大而减弱。并且利用航天器与等离子体相互作用分析软件,通过PIC(Particle In Cell)方法研究了低轨道等离子体环境下太阳电池间隙裸露导体尺寸和工作电压对航天器悬浮电位的影响,并将仿真分析结果与无限大平板电流收集模型计算结果进行了对比分析,对比悬浮电位仿真分析与模型计算结果表明,太阳电池产生的势垒效应阻碍了航天器对电子电流的收集。
The potential barrier caused by the positive bias voltage of solar cell and the negative potential of the cover glass surface and its influence on the absolute electrification of low orbit spacecraft. In this paper, the influence of the bare conductor size of the cell gap on the barrier effect of the solar cell is firstly analyzed based on the axisymmetric model structure. The results show that the barrier effect of the solar cell weakens as the bare cell size increases. And the effect of bare conductor size and working voltage on spacecraft levitation potential under low orbital plasma environment was studied by using PIC (Particle In Cell) method by using spacecraft and plasma interaction analysis software. The results of simulation analysis Compared with the calculation results of the infinite plate current collection model, the simulation analysis of the floating potential and the calculation results of the model show that the barrier effect generated by the solar cell hinders the spacecraft from collecting the electron current.