Chinese Space Science and Technology ›› 2020, Vol. 40 ›› Issue (5): 10-17.doi: 10.16708/j.cnki.1000-758X.2020.0053

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Dimensional stability design and verification of GF-7 satellite structure

QIAN Zhiying, LUO Wenbo, YIN Yazhou, ZHANG Ling, BAI Gang, CAI Zheng, FU Weichun, LU Qingrong, ZHANG Xinwei, ZHAO Chenguang#br#   

  1. 1.Beijing Institute of Spacecraft System Engineering, Beijing100094, China
    2.Beijing Institute of Control Engineering, Beijing100094, China
    3.Institute of Remote Sensing Satellite, China Academy of Space Technology, Beijing100094, China
  • Online:2020-10-25 Published:2020-09-30

Abstract: 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.

Key words: GF-7, satellite structure, dimensional stability, thermal distorsion, design and verification