基于交互式多模型的弹道导弹跟踪

弹道导弹飞行主动段和自由段的运动学模型差别很大,在未准确知道导弹关机点时间先验信息前提下如何对弹道导弹主动段到自由段进行连续跟踪已成为目前亟待解决的问题.针对该问题,提出了一种实时交互多模型跟踪算法,根据弹道导弹主动段和自由段不同受力情况建立相应的跟踪模型.该算法包括两个滤波器:一个为对主动段跟踪效果比较好的CA-EK...

Ballistic Missile Tracking Based on Interacting Multiple Model

The kinematics models of boost phase and coast phase of the ballistic missile(BM) trajectory are rather different,so how to consecutively track the boost phase and coast phase transitions without any prior information has become an urgent problem.To solve this problem,an interacting multiple model(IMM) filter is proposed,which establishes relevant tracking models based on boost phase and coast phase of the ballistic trajectory.Two filters are needed in the algorithm,one is CA-EKF which is adapted to track boost phase,and the other is CV-EKF which is adapted to track coast phase.These two filters estimate the real time state of the BM by adapted updating probability of the two models.Simulation results show that the proposed algorithm can consecutively track the BM from the boost phase till the coast phase and be proved of high estimation precision.