Journal of Astronautics ›› 2018, Vol. 39 ›› Issue (7): 732-739.doi: 10.3873/j.issn.1000-1328.2018.07.004

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Multi Target and Multi Constraint Optimization of Orbit Maintenance of Complex and Spacecraft

CHEN Li dan, XIE Jian feng, LI Jun feng, HAO Da gong   

  1. 1. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China; 2. Beijing Aerospace Control Center, Beijing 100094, China
  • Received:2017-09-08 Revised:2018-03-27 Online:2018-07-15 Published:2018-07-25

Abstract:

The longitude of ascending node, the orbital eccentricity, the braking point’s altitude and flight path angle are required in the orbit maintenance of the TG-2/SZ-11 mission. Despite of the multiple targets, the aim of decreasing the collision risk between SZ-11, TG-2 and its concomitant satellite greatly increases the complexity of the maintenance. In this paper, the control equations of the multiple targets in the mission are established. Two important regularities are analyzed according to the flight characteristics, one for the evolution of the eccentricity of the near-circular orbit and the other for the rules of velocity increment of spacecraft’s double-impulse control varying with the impulse time. Then, a multi-target and multi-constraint optimization strategy is instituted. The simulation results based on the TG-2/SZ-11 mission show that the method and the strategy are effective and are applicable for engineering applications.

Key words: Orbit maintenance, Ground track control, Eccentricity vector control, Braking point control, Avoidance control

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