摘要
针对中国空间站100 V太阳电池阵引起的结构带电威胁航天员出舱活动安全问题,通过空间站结构充电模拟仿真与理论计算,研究了空间站在低轨道等离子体和地磁场环境下的充电特性,得出最恶劣条件下,空间站结构充电电位最大可达-108.6 V。并针对空间站的太阳电池阵电子吸收充电特性,以及电位控制需求,开展了自适应主动电位控制方法研究,采用空心阴极电子发射技术,研制了中国首个测控一体的空间主动电位控制系统,该系统完成了电位控制地面模拟试验验证,并搭载于空间站天和一号核心舱,实现了在轨应用。空间站在轨电位检测数据表明,主动电位控制系统成功将中国空间站结构电位从-55 V控制到-12 V以内,保障了航天员出舱活动的生命安全。
In response to the threat of structural electrification caused by the 100 V solar array of the China space station to the safety of astronauts during extravehicular activities,the charging characteristics of the space station in low Earth orbit plasma and geomagnetic field environments are studied through simulations and theoretical calculations of the space station structural charging.It is found that the maximum charging potential of the space station structure can reach-108.6 V under the worst conditions.In addition,in response to the charging characteristics of the electronic absorption of the space station solar array and the potential control requirements,the active potential control method of the China space station is studied,the hollow cathode electronic emission technology adopted,and China’s first space active potential control system integrated with measurement and control is designed.The system has completed ground simulation testing and verification of potential control,and has been mounted on the Tianhe Core Module of the space station,and has realized on-orbit application.The on-orbit potential detection data of the space station indicates that the active potential control system has successfully controlled the structural potential of the China space station from-55 V to within-12 V,ensuring the life safety of astronauts during extravehicular activities.
作者
李得天
刘海波
孙迎萍
秦晓刚
胡向宇
史亮
柳青
王彦龙
程天然
仪德英
陈恒智
LI Detian;LIU Haibo;SUN Yingping;QIN Xiaogang;HU Xiangyu;SHI Liang;LIU Qing;WANG Yanlong;CHENG Tianran;YI Deying;CHEN Hengzhi(Lanzhou Institute of Physics,Lanzhou 730000,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2023年第10期1613-1620,共8页
Journal of Astronautics
关键词
空间站
主动电位控制系统
太阳电池阵
空间站充电效应
在轨验证
Space station
Active potential control system
Solar array
Space station charging effect
On-orbit verification
