径向加速度是武器系统射表编拟的重要参数,对其直接测量相对困难,提出一种从雷达回波信号中提取径向加速度的方法。首先,分析径向加速度对雷达回波相位的影响;其次,针对雷达实测数据,依次通过多项相位变换和短时傅里叶变换获得径向加速度的谱图,再利用重心法对径向加速度进行提取;最后,与基于目标距离中心平滑微分径向加速度提取法进行比较,结果表明该方法的提取精度优于中心平滑微分法。

Radial acceleration is an important parameter of range compilation of weapon system, which is difficult to be measured directly. An approach deriving radial acceleration from radar echo phase was proposed. Firstly, effects of radial acceleration on radar echo phase was analyzed. Secondly, according to measured radar data, time-frequency distribution of radial acceleration was achieved through polynomial phase transform and short-time Fourier transform, and corresponding acceleration was derived by the center-of-gravity method. Finally, compared with center smoothing differential processing method based on the target distance, radial acceleration extracted in this paper was more accurate.