基于电火箭推进的地-月轨道转移自主导航研究

以电推进力作为奔月航天器在进入月球影响球之后的螺旋式减速转移过程的主推进力和姿态控制力,建立限制性三体力学模型.采用星光导航方式,结合UKF非线性滤波方法进行自主导航研究.推力的引入方式能有效抑制由于航天器姿态与导航误差耦合而导致的推力矢量方向误差.通过大量的计算机仿真,详细研究和分析了电推进条件下自主导航的发散问题,有针对性地给出了抑止发散的方法,为工程实现提供了有利的参考依据.

Autonomous Navigation for Earth-Moon Orbital Transfer Based on Electric Propulsion

Presented herein is a concept of autonomous navigation in the lunar orbit capture spiral transfer performed by the electric propulsion stage.The orbital transfer is modeled by the dynamics of the classical restricted three-body problem.The Unscented Kalman Filter based on the measurements of star sensors is adapted to the spacecraft's autonomous orbit determination.The mode of propulsion introduction can restrain the errors of propulsion vectors caused by strong couplings between the spacecraft attitude and...