一种适用于助推段弹道导弹的跟踪方法研究

弹道导弹在助推段的运动特性较为复杂,且由于各级助推器的脱落导弹的加速度存在突变点,在导弹关机时刻的加速度突变最大,因此在跟踪时容易产生较大滤波偏差。本文主要对弹道导弹助推段的加速度特性进行了分析,选择CJ模型来描述其运动特性,采用交互式多模型(IMM)和无敏滤波(UF)算法对处于助推段的弹道目标进行跟踪。由仿真结果可以看出本文所提出的基于CJ模型和CA模型组合的IMM-UF跟踪方法可以较好地实现对助推段弹道导弹的跟踪。同时通过模型集合中各模型的概率变化情况可以很好地完成对导弹关机时刻的判定,这为后续尽早定轨和轨道预报等提供了前提。该算法结构简单实现稳定,具有较好的工程应用价值。

Method for Tracking Ballistic Missile on Boost Phase

The dynamic feature of ballistic missile in boost phase is sophisticated,and its acceleration changes abruptly when each booster burns out,which results in big filtering bias.The acceleration characteristic of ballistic missile in boost phase was analyzed,and CJ model as the dynamic model of ballistic missile was chosen,IMM&UF to track ballistic missile in boost phase was adopted.The simulation result indicates the IMM-UF algorithm based on combination of CJ models and CA model is applicable to track ballistic missile in boost phase.At the same time,the burnout time of BM can be estimated through the probabilities changing of models in model-bank,which provides the foundation for early orbit determination and prediction.This algorithm has good engineering value with simple structure and stable realization.