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在線閱讀 --自然科學版 2020年6期《GEO航天器表面充電效應及電流分布特性分析》
GEO航天器表面充電效應及電流分布特性分析--[在線閱讀]
郝建紅1, 黃賽1, 趙強2, 董志偉2
1. 華北電力大學 電氣與電子工程學院, 北京 102206;
2. 北京應用物理與計算數學研究所, 北京 100094
起止頁碼: 493--499頁
DOI: 10.13763/j.cnki.jhebnu.nse.2020.06.006
摘要
處于復雜等離子體環境的地球同步軌道中的航天器,由于表面材料與空間等離子體相互作用,將使航天器表面出現充電效應,最終導致靜電放電現象繼而影響航天器電子設備的正常運行以及熱控材料的性能.基于歐洲航天局開發的航天器表面充電仿真軟件,模擬了服從雙麥克斯韋分布的等離子體中地球同步軌道航天器的表面充電情況;計算分析了航天器各部位表面總電流的變化情況以及各粒子電流在充電過程中的作用,并給出了航天器各部位的表面電勢分布,以及航天器充電過程中空間電勢分布對充電效應的影響.

Analysis on Surface Charging Effect and Current Distribution Characteristics of GEO Spacecraft
HAO Jianhong1, HUANG Sai1, ZHAO Qiang2, DONG Zhiwei2
1. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;
2. Beijing Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
Abstract:
The geosynchronous earth orbit space in plasma environment is very complicated.In the geosynchronous orbit plasma environment,the energy distribution of space particles is very wide,involving almost all energy plasmas,and the energy spectra of particles are not exactly the same.The energy and distributions under different geomagnetic conditions are also different.When the geosynchronous earth orbiting spacecraft interacts with high-energy particles in the environmental plasma,a large amount of charge will deposite on the surface of the spacecraft which build an electric field in different surface.When the absolute potential of the surface of the spacecraft or the differential potential between different surface reaches the threshold,it will cause an electrostatic discharge,and the arc generated by the electrostatic discharge will directly affect the physical characteristics of the spacecraft surface materials and surface equipment normal operation,and it will also indirectly affect the internal circuit of the spacecraft in a coupled manner.Surface charging can be divided into two types:absolute charging and differential charging.Absolute charging refers to the charging of the spacecraft surface directly determined by the space environment and material characteristics.Differential charging refers to the potential variety determined by surface potential of different spacecraft surfaces.Based on the spacecraft surface charging simulation software developed by the European Space Agency,this article work simulated the surface charging of a geosynchronous orbiting spacecraft in a plasma that obeys a bi-Maxwell distribution.The change of the total surface current of each part of the spacecraft and the role of each particle current in the charging process were calculated and analyzed.The potential distribution of the surface of each part of the spacecraft and the effect of the space potential distribution on the charging effect during the charging process of the spacecraft were given.

收稿日期: 2020-04-08
基金項目: 國家自然科學基金(U1730247,11571047,61372050)

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