The invention discloses a satellite-borne space target collision early warning method and a satellite-borne space target collision early warning system, which are suitable for on-orbit autonomous collision early warning of a spacecraft and have relatively high timeliness and update rate. Different from a region criterion for averaging distribution of position errors, the method takes the position errors of the spacecraft and the target as a normal distribution form during calculation of the collision probability, takes horizontal and vertical coordinates of the spacecraft in an intersection reference system as independent variables, and takes projection of a relative position vector on an intersection plane as an expected value of normal distribution, so that the collision probability is calculated. By taking the position error as a standard deviation of normal distribution, constructing a probability density function in a normal distribution form so as to represent collision probabilities of the spacecraft and the target in all positions in the rendezvous reference system; the critical threshold is used to construct the ball domain, the integral of the ball domain to the probability density function is solved, and the integral is used as the collision probability, so that the excessive early warning rate can be reduced. The system is located on a satellite, can meet the high-performance calculation requirement of satellite-borne equipment, and has an on-orbit real-time collision early warning function.
本发明公开了星载空间目标碰撞预警方法及系统,适用于航天器在轨自主开展碰撞预警,具有较强的时效性和更新率。不同于将位置误差的分布平均化处理的区域判据,本发明在计算碰撞概率时将航天器与目标的位置误差视为正态分布的形式,以航天器在交会参考系中的横、纵坐标为自变量,以相对位置矢量在交会平面上的投影为正态分布的期望值,以位置误差为正态分布的标准差,构建形式为正态分布的概率密度函数,以表征航天器和目标在交会参考系内各处的碰撞概率;以临界阈值构建球域,求解球域对概率密度函数的积分,以该积分作为碰撞概率,可以降低过度预警率。本系统位于星上,可以满足星载设备高性能计算需求,具备在轨实时碰撞预警功能。
Satellite-borne space target collision early warning method and system
星载空间目标碰撞预警方法及系统
2023-12-08
Patent
Electronic Resource
Chinese
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