为了提高对自由段弹道导弹的跟踪精度,在混合坐标系下构建了自由段弹道导弹不做机动时更为准确的系统动力学模型。为提高对自由段弹道导弹目标机动时的适应能力,结合Singer和当前统计模型给出了自由段弹道导弹机动时的系统动力学模型,利用交互多模型(IMM)实现了对导弹的跟踪。在对探测数据的处理过程中,为了避免探测数据中闪烁噪声的影响,提出了IMM-UPF算法,并分别与EKF、UKF、UPF等算法做了对比分析。仿真结果表明,IMM-UPF算法对存在机动的自由段弹道目标以及雷达闪烁噪声具有良好的适应性,较EKF、UKF、UPF能够获得较高的跟踪精度。
Abstract
To improve the accuracy of tracking ballistic missile at free-flight phase,the accurate model of non-maneuvering ballistic missile at free-flight phase was constructed in mixed coordinate system.To improve the adaptability to maneuvering ballistic target,the system dynamics model of ballistic missile maneuvering at free-flight phase was presented combined with Singer and current statistical model,and the interaction multi-models(IMM)was used to track the missile.To avoid the effect of the flicker noise in the tracking data,the IMM-UPF algorithm was proposed,and it was compared to EKF,UKF and UPF respectively.The simulation results show that the IMM-UPF has better adaptability to the maneuvering ballistic target and the flicker noise of target’s data,and it has high accurate tracking ability than EKF,UKF and UPF.
关键词
混合坐标系 /
弹道导弹 /
自由飞行弹道 /
交互多模型 /
不敏粒子滤波
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Key words
mixed coordinates system /
ballistic missile /
free-flight trajectory /
interacting multiple model /
unscented particle filter
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