高分七号卫星结构尺寸稳定性设计与验证  

Dimensional stability design and verification of GF-7 satellite structure

作　　者：钱志英[1] 罗文波[1] 殷亚州 张玲 白刚[1] 蔡铮[1] 傅伟纯 卢清荣 张新伟[3] 赵晨光 QIAN Zhiying;LUO Wenbo;YIN Yazhou;ZHANG Ling;BAI Gang;CAI Zheng;FU Weichun;LU Qingrong;ZHANG Xinwei;ZHAO Chenguang(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;Beijing Institute of Control Engineering,Beijing 100094,China;Institute of Remote Sensing Satellite,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]北京控制工程研究所,北京100094 [3]中国空间技术研究院遥感卫星总体部,北京100094

出　　处：《中国空间科学技术》2020年第5期10-17,共8页Chinese Space Science and Technology

基　　金：载人航天预先研究项目(010201)。

摘　　要：尺寸稳定性是高分七号卫星(GF-7)结构设计的重要使命。针对GF-7结构尺寸稳定性设计需求,开展了影响因素分析,并针对分解指标给出了适用于航天器结构的尺寸稳定性设计和验证流程。首先,在整星结构构型设计的基础上,通过灵敏度分析确定了结构选材方案。随后,针对尺寸稳定性关键件一体化支架,提出了热控设计和结构设计方案。最终,通过舱段级热稳定性试验获得了结构平均热膨胀系数等结构稳定性关键参数,利用经试验结果修正后的有限元模型开展了卫星在轨热变形分析并验证了指标的可实现性。结果表明,GF-7结构设计满足载荷安装面指向变化亚角秒级的尺寸稳定性指标要求。Dimensional stability is an important mission of GF-7 satellite structure design.The influence factor analysis was carried out in accordance to the demand of structural dimension stability,and then the design and verification process of structural dimensional stability was proposed according to the decomposed index.Firstly,on the basis of the structure configuration design,the structure material selection plan was determined by sensitive analysis.Then the thermal and structure design of the key component of dimensional stability,the integrated support structure,was proposed.Finally,the mean coefficients of thermal expansion of structure were obtained by thermal distorsion test,and the feasibility of the index was verified by in-orbit thermal deformation analysis using the updated finite element model of the satellite.The results show that the design of GF-7 satellite structure meets the requirements of dimensional stability index.

关 键 词：高分七号 卫星结构 尺寸稳定性 热变形 设计验证 

分 类 号：V474.26[航空宇航科学与技术—飞行器设计]