Chinese Space Science and Technology ›› 2020, Vol. 40 ›› Issue (5): 34-41.doi: 10.16708/j.cnki.1000-758X.2020.0056

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Highprecision control technology and onorbit verification of GF-7 satellite

CHEN Chao,DING Jianzhao,WANG Shuyi,LIU Jie   

  1. 1.Beijing Institute of Control Engineering, Beijing100094, China
    2.Science and Technology on Space Intelligent Control Laboratory, Beijing100094, China
  • Online:2020-10-25 Published:2020-09-30

Abstract:  The performance of GF-7 satellite attitude and orbit control system (AOCS) is improved by developing new very high precision star sensor and solar array driver architecture (SADA). The precision of AOCS is improved by adopting on-board parameter calibration and low frequency compensation between satelliteground loop technologies. The result of flight test shows that the control system achieves the angular-second highprecision accuracy and the control stability is expected to be within 10-5(°)/s, which indicates the control methods are effective. Compared with other control systems of satellites, the system of GF-7 satellite is advanced in the world which has improved the ability of highprecision control of satellites in China. At the end of this paper, the development direction of GF-7 highprecision control is pointed out.

Key words: GF-7 satellite, high-precision control, attitude determination, system architecture, onorbit test, star sensor, solar array driver architecture (SADA)