| Citation: | BAI Shengzhou, WANG Huijiang, HAN Chao, et al. Teardrop hovering configuration control strategy based on piecewise constant thrust[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(3): 560-566. doi: 10.13700/j.bh.1001-5965.2018.0408(in Chinese)
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In order to meet the requirements of relative motion control for spacecraft formation flying missions, design and control of spacecraft's forced fly-around formation under the control of piecewise constant thrust are investigated. For teardrop hovering configuration under pulse control, a multi-level constant thrust control strategy is proposed. The shooting equation is transformed into the solution of the extreme value problem, and the least square method is used to solve it. In this paper, constant thrust feasibility is also analyzed. Based on continuous constant small-thrust control equations, the small neighborhood theorem is deduced, and the feasibility of two-segment constant thrust control is analyzed in near-distance relative motion. In addition, a small-thrust increment equation is proposed to improve the solution accuracy, and it is proved that multiple iterations can precisely approximate the ideal solution. Finally, numerical simulations show that a constant small-thrust control strategy is feasible for the teardrop hovering relative motion. The theory of spacecraft forced fly-around design and control is enriched, and the results provide a reference for engineering applications.
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