基于复合阵鱼雷声成像方位分辨率提高方法

A Method for Azimuth Resolution Improvement of Torpedo Acoustic Imaging Based on Complex Array

研究了鱼雷基于预成空间密集波束进行声成像目标识别和精确制导的基阵设计与波束形成方法。针对鱼雷孔径小、空间尺度和可容纳的信号处理硬件规模有限等特点,提出了鱼雷声成像的非均匀复合基阵设计方法以及基于该复合阵设计的波束形成方法。与传统的鱼雷自导等效均匀线列阵设计相比,在相同阵列物理孔径条件下,该方法改善了波束空间指向性,提高了波束空间方位分辨力,在相同波束配置的要求下,该方法减少了阵元数和接收通道数,减小了阵列孔径及信号处理的硬件规模。仿真结果验证了该方法的有效性和可行性。

The array-design and beam-forming method for torpedo automatic target recognition and intelligent precise guidance based on preformed dense beams and underwater acoustic imaging is investigated. Aiming at the characteristics of torpedo application, such as small aperture, limited space and hardware scale, etc. , an unequal array and a beam-forming method based on the complex array are proposed. Compared with the traditional equivalent uniform linear array model of torpedo homing system, this method improves beam patterns, and enhances the azimuth resolution within the same limit of array aperture. Simultaneously, under the same condition of beam configuration, the elements of the array and the signal processing channels of the system are greatly reduced. Accordingly, the essential aperture of array and hardware required can also be reduced. Simulation results verify the validity and feasibility of this proposed method.