首先针对弹道导弹再入大气层后的弹道轨迹进行仿真建模。为解决当前目标跟踪算法中机动模型与再入类目标实际运动不匹配的问题,采用了基于弹道模型的目标跟踪算法。获得滤波结果中来袭导弹目标的每一时刻位置及速度信息后,利用比例导引制导方法,可以实现对来袭目标和拦截弹理想弹道轨迹的三维数据仿真。仿真结果表明,算法可以对导弹目标进行稳定的跟踪,对拦截弹进行精确的制导。

In the first, the model of reentry trajectory of tactical ballistic missile was built and simulated. In order to solve the problem of mismatch between the maneuvering model in target tracking algorithm and actual movement of the reentry target, a novel target tracking algorithm based on ballistic missile model was used. When information of missile target's position and velocity at every moment was obtained, the simulation of ideal three-dimensional missile trajectory can be realized with the proportional navigation method. The simulation result shows that with the proposed algorithm, the target can be tracked stably and the missile can be guided accurately.