一种大口径身管内弹道目标速度修复方法

A Method of Repairing Ballistic Target Speed in Large Diameter

摘要:

在管状结构内，身管、管内运动目标、反射板和毫米波干涉仪等多目标的强烈联合振动使得利用毫米波干涉仪测试获得的目标运动速度曲线出现多段缺失，影响了管内运动目标速度测量。针对该问题，提出了一种基于阈值判别和粒子滤波优化的大口径管状结构内目标速度修复方案，该方案是在对实际信号的小波去噪预处理上，通过短时傅里叶变换（STFT）进行时频分析，得出速度曲线，针对速度曲线的多段缺失采用阈值判别法进行初步修复，再利用粒子滤波进一步修复与优化。实验结果表明，提出的方法能够有效解决目标速度缺失现象，实现大口径身管内目标速度有效测量，并且能适应处理多种速度级别的雷达信号。

Abstract:

In the tubular structure, the multi-objective strong joint vibration of the barrel, the moving target in the pipe, the reflector and the millimeter-wave interferometer makes the target moving speed curve obtained by the millimeter-wave interferometer test have multiple segments missing, which affects the measurement of the moving target velocity in the pipe . In order to solve this problem, a target speed restoration scheme based on threshold discrimination and particle filter optimization in a large-diameter tubular structure is proposed. The proposed scheme is based on the short-time Fourier transform (STFT) ) For time-frequency analysis, the velocity curve was obtained. The multi-segment loss of the velocity curve was initially repaired by the threshold method, and then the particle filter was used to further repair and optimize the velocity curve. The experimental results show that the proposed method can effectively solve the problem of target speed loss, effectively measure the target speed in large bore tube, and can adapt to radar signals processing at various speed levels.