“天问一号”火星磁强计伸杆机构  

Deployable boom for Mars Orbiter Magnetometer onboard Tianwen-1

作　　者：陈满明 潘宗浩[1,2] 张铁龙 郝新军[1,2] 李毅人 刘凯[1,2] 李新[1,2] 汪毓明[1,2] 申成龙[1,2] 陈鸿[4] 王中王 强秀[5] Manming Chen;Zonghao Pan;Tielong Zhang;Xinjun Hao;Yiren Li;Kai Liu;Xin Li;Yuming Wang;Chenglong Shen;Hong Chen;Zhongwang Wang;Xiu Qiang(School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Comparative Planetology,Hefei 230026,China;Space Research Institute,Austrian Academy of Sciences,Graz A-8042,Austria;Shanghai Institute of Aerospace System Engineering,Shanghai 201109,China;Shaanxi Applied Physics and Chemistry Research Institute,Xi’an 710061,China)

机构地区：[1]中国科学技术大学地球和空间科学学院,安徽合肥230026 [2]中国科学院比较行星学卓越创新中心,安徽合肥230026 [3]奥地利科学院空间研究所,格拉茨A-8042,奥地利 [4]上海宇航系统工程研究所,上海201109 [5]陕西省应用物理化学研究所,陕西西安710061

出　　处：《中国科学技术大学学报》2022年第5期61-68,I0003,共9页JUSTC

基　　金：financially supported by the Chinese National Space Administration (CNSA),the Strategic Priority Program (XDB41000000);the Key Research Program of Frontier Sciences (QYZDB-SSW-DQC015);the Strategic Priority Program (XDB41030100) of the Chinese Academy of Sciences。

摘　　要：3 m多长的伸杆机构是天问一号火星磁强计的一个重要组成部分,用于将磁通门磁强计探头伸离卫星本体以减小卫星对磁场测量的影响。火星磁强计伸杆机构是一种多关节、铰链转轴驱动的一次性展开机构。在设计时充分考虑到了其功能性、可靠性和系统约束要求等因素。力学分析和地面验证试验表明火星磁强计伸杆机构足以承受最坏情况下的在轨环境。在经历了漫长的地火转移旅程后,火星磁强计伸杆机构于2021年5月25日成功展开。展开过程耗时约4.6 s,两个探头被送至远离环绕器本体位置,其中外侧探头距离环绕器3.19 m,内侧探头距离环绕器2.29 m。展开到位后,外侧探头处所测得的磁场大小由1250 nT减弱至不到6 nT。火星磁强计伸杆机构为后续探测任务中需在低温环境下长期贮存的空间展开机构的研制提供了宝贵的工程经验。A more than 3 m-long deployable boom is an essential component of the Mars Orbiter Magnetometer(MOMAG) onboard the orbiter of Tianwen-1.The boom was developed to place fluxgate magnetometer(FGM) sensors away from the satellite to reduce the influence of the satellite magnetic field.It was designed as an articulated springdriven deployable mechanism for single-shot deployment.Functionality,reliability and system constraints are fully considered in the boom design.Mechanical analyses and proof tests show that the boom has sufficient safety margin to withstand environmental conditions,even in the worst cases.After a long voyage from Earth to Mars,the boom was deployed successfully on May 25,2021.A full deployment was performed in about 4.6 s,sending the two sensors to distances of 3.19 m and 2.29 m respectively,away from the orbiter.After deployment,the field from the orbiter decreased from 1250 nT to less than 6 nT at the sensor mounted at the tip of the boom.The MOMAG boom provides valuable engineering experience for the development of deployable structures stowed for long periods in cold temperatures in space missions.

关 键 词：航天器展开机构 磁通门磁强计 火星探测 天问一号 

分 类 号：V447[航空宇航科学与技术—飞行器设计]