• 空间科学 •

### 航天器表面电荷激发空间静电场规律研究

1. 陆军工程大学石家庄校区电磁环境效应国家级重点实验室，石家庄 050003
• 收稿日期:2018-03-16 修回日期:2018-05-10 出版日期:2018-11-15 发布日期:2018-11-25
• 基金资助:

国家自然科学基金(51777213, 51277181); 装备预研基金重点项目(61402090201)

### Study on Distribution of Electrostatic Field Induced by Spacecraft Surface Charge

LIU Xing gang, WEI Ming, HU Xiao feng

1. Key Laboratory on Electromagnetic Effects, Shijiazhunag Campus of Army Engineering University, Shijiazhuang 050003, China
• Received:2018-03-16 Revised:2018-05-10 Online:2018-11-15 Published:2018-11-25

Abstract:

The analytic expression of the electrostatic potential near the spacecraft surface is obtained by solving the Poisson equation based on the electrostatic field theory, and the mathematical expression of the electric field intensity near the spacecraft surface is deduced. Using the boundary condition of the electromagnetic field, the dielectric surface potential-permittivity model is established, and the relationship among the dielectric surface potential, surface charge and permittivity is gained. Taking the practical cases for example, the change regulation of the surface charge with surface potential and the distribution of the electrostatic field near the spacecraft surface is discussed, and the effect of the dielectric constant on the surface charge and surface potential is analyzed. The results show that the electrostatic field induced by the dielectric surface charge decreases as the distance incrases when the surface potential of media is constant, and the surface potential of media decreases with the increase of the dielectric permittivity and tends to a stable value under the condition that the dielectric material has equal charge. Therefore, it is possible to select the dielectric materials with smaller permittivity under certain conditions to reduce their surface potential, and to reduce the probability of the electrostatic discharge between different media.