| Citation: | JI Haoran, HUANG Di. A smooth Sun-pointing guidance method for satellites constrained by deviation of Earth-pointing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(2): 351-358. doi: 10.13700/j.bh.1001-5965.2020.0293(in Chinese)
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Under traditional Sun-pointing guidance method constrained by the deviation of Earth-pointing, the expected attitude of the satellite would rapidly flip when the angle between the satellite-Sun line and the satellite-Earth line reaches the extreme value, leading to the large peak power consumption and lifetime damage. Aimed at this problem, this paper provides a novel Sun-pointing method constrained by the deviation of Earth-pointing, which can make the expected attitude change smoothly. By this method, the expected attitude of the satellite is set to rotate periodically around a reference attitude. The deviation of Earth-pointing is kept less than the constraint angle with the attitude moving smoothly, while the effectiveness of Sun-pointing is not evidently reduced. Numerical simulation results show that the proposed method can greatly reduce the peak angular velocity of the satellite, and can meet the requirements of both Sun-pointing and Earth-pointing.
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