空间目标航迹片段关联算法研究

为了有效改善空间目标跟踪的连续性、稳定性,针对空间目标断续航迹关联问题开展相关研究,建立了地心惯性(ECI)坐标系下基于欧拉方程的外推预报和东北天(ENU)坐标系下基于动力学方程约束的外推预报。在利用中段动力学模型对中断前的目标运动轨迹进行预报外推的基础上,利用中断航迹预报外推结果和中断后新起始的每个航迹段前几个时刻的状态更新值,构造检验统计量进行关联配对,实现中断前后空间目标航迹的关联融合,以此提高空间目标跟踪精度和有效跟踪批数。

Research on Space-target Track Segments Association Algorithm

In order to improve the tracking continuity and stability of space targets,the track segments association algorithms were studied. The extrapolation prediction based on Euler equation in earth-centered-innertial(ECI)coordinates was carried out,as well as the extrapolation prediction based on kinetic equation in east-north-up(ENU)coordinates. The dynamic model of space target was used to forecast and extrapolate the trajectory of the interrupted target. Based on the extrapolation of the terminated track,the test statistics were constructed,and the track segments were associated by using the extrapolation results and the state update values at the first few moments of each track segment after the interruption. In this way,the association and fusion of space target interrupted tracks were completed. The research results can improve the tracking accuracy of space targets and increase the number of targets effectively tracked.