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针对单模型跟踪算法无法实现对弹道导弹连续精确跟踪的问题,提出了一种地心地固坐标系下弹道导弹全阶段连续跟踪的交互式多模型(IMM)算法。根据导弹不同飞行阶段的受力情况建立IMM算法的两个滤波模型集:助推段采用恒轴向力模型,中段、再入段采用被动段跟踪模型,两个模型都利用滤波精度高、数值稳定性较好的求容积卡尔曼滤波算法进行滤波。针对该IMM算法在混合估计过程中引入偏差的问题,采用无偏混合的方法,以两种典型的跟踪场景进行仿真校验,实验结果验证了该文算法的优越性。
Aiming at the problem that the single model tracking algorithm can not realize continuous and accurate tracking of ballistic missiles, an interactive multi-model (IMM) algorithm for continuous tracking of ballistic missiles in all phases of geocentric solid coordinate system is proposed. According to the force of missile during different flight phases, two filter model sets of IMM algorithm are established: the constant axial force model is used for the boost segment, the passive segment tracking model is used for the middle segment and the reentry segment. Both models use the high filtering accuracy, Better stability of Volume Kalman filter algorithm for filtering. Aiming at the problem that the IMM algorithm introduced the bias in the hybrid estimation process, the unbiased hybrid method is used to verify the performance of the proposed algorithm based on two typical tracking scenarios.