探测尾流自导鱼雷主动声呐的波形设计

为了实现对不同速度尾流自导鱼雷的稳定探测,建立尾流自导鱼雷典型弹道模型,对运动平台主动声呐混响和鱼雷目标回波的多普勒特性进行分析。研究结果表明对于探测尾流自导鱼雷的主动声呐来说,当鱼雷速度小于2倍平台速度时目标多普勒较小且不稳定,仅依靠多普勒滤波难以完全避开混响干扰并实现稳定探测。提出使用宽带多普勒敏感信号与CW信号的组合形式来探测尾流自导鱼雷。仿真给出了组合信号的距离、速度分辨力和混响抑制能力,证明了其性能良好。

Waveforms design for active wake homing torpedo detection

In order to achieve the stable detection at different speeds of wake homing torpedo, the model of wake homing torpedo is established, and the Doppler properties of motion platform’s sonar reverberation and target echo are analyzed in the paper. The results show that for the active sonar of detectong wake homing torpedo, the Doppler of target echo is small and unstable when the torpedo speed is less than 2 times the platform speed. So it is difficult to detect wake homing torpedo stably by using Doppler filtering. Wideband Doppler sensitive pulse combined with CW pulse is proposed to detect wake homing torpedo. The simulation shows that the combined pulse has super abilities in range resolution, speed resolution and reverberation suppression.