基于碰撞概率的分布式卫星碰撞检测评估方法

Probability density function basd collision monitoring method within formation flight

综合考虑卫星外形尺寸、预测时间、初始协方差阵以及空间摄动的影响,提出了一种精确的基于碰撞概率的碰撞检测评估方法。考虑到分布式卫星沿迹向位置误差很难精确预测,本文提出了一种基于判定垂直于沿迹向的平面(X-Z投影面)碰撞概率来进行碰撞规避轨道机动的保守性自主安全运行方法。最后,运用本文提出的碰撞检测评估方法,对影响分布式卫星空间构形被动运行安全性的因素进行了分析,并提出了具有良好被动运行安全性分布式卫星空间构形的设计方法。

In this paper a more precise collision monitoring method is proposed first, which takes the influences of the shape of satellite, predict time, relative covariance matrix and all kinds of perturbations into consideration. Then, because it is very difficult to predict the error of along track position, a conservative autonomous safety operational method based on the judgment of the collision probability in the projected X-Z plane is presented. Finally, the proposed collision monitoring algorithm is used to analyze the passive operational safety of Direct Satellite System （DSS）, and a new formation geometry design method is proposed. By using this new design method the DSS can have good passive operational safety.