基于光度曲线的弱特征空间目标姿态估计

Attitude Estimation of Weak-Feature Space Object from Light Curve

针对暗弱空间光度曲线波动不明显的弱特征目标姿态难以估计的问题,本文基于不同观测站所得到的目标光度曲线具有差异的特点提出以空间换取精度的设想,并据此设计了多站联合光度观测并行融合的解决方案。通过分析站点位置以及站点数量对弱特征空间目标姿态估计的影响,验证了该解决方案的可行性与有效性,发现了站点的布置有规律可循。仿真表明,站点之间距离的增加以及站点数量的增加都可以减小姿态估计误差,而通过沿空间目标对太阳光线反射的相对方向布置站点可以得到更好的姿态估计结果。

Considering the difficulty in attitude estimation of a weak-feature object in faint space with insignificant fluctuation light curve,this paper proposes the idea of trading space for accuracy based on the fact that the light curves obtained on different sites are different,and designs a multi-site joint photometric parallel fusion solution.By analyzing the influence of the positions and the number of sites on the weak-feature space object attitude estimation,the feasibility and effectiveness of the solution are verified.We also find there are rules for the site positions to follow.The numerical simulation shows that both the increased site distance and site number can reduce the attitude estimation error,and a much better attitude estimation result can be obtained by arranging the sites along the opposite directions of the space object’s reflection of the sun lights.