ターゲット衛星の周りを飛行する宇宙ロボットの3次元軌道設計と推力変動を考慮した制御

抄録

This paper presents a method of designing and keeping three-dimensional flyaround trajectory for a space robot (chaser) flying periodically around a malfunctioning satellite (target) on a circular orbit around the earth. The trajectory is designed by considering orbital dynamics of the chaser represented by the Hill’s equation. An optimal feedback control scheme for the thrust is proposed to maintain the designed trajectory in the presence of disturbances. The extended Kalman filter is employed to estimate state and control variables which are not available for measurement. Simulation results that verify the trajectory keeping capability of the proposed thrust control are also presented.