尾流自导鱼雷防御系统接收信号模型及参数优化

针对目前尾流自导鱼雷对舰艇的严重威胁，从舰艇尾部反尾流自导鱼雷的角度出发，分析了尾流回波信号的声学特征模型。研究表明，尾流回波声压主要取决于气泡尺寸、数量，舰船吃水深度和航速及基阵发射频率等因素。根据所研究模型和国外实测尾流气泡半径和密度数据，对比于鱼雷回波信号，对防御系统的主要参数（如发射频率、发射脉宽和周期以及工作距离和深度等）的选取和优化进行了理论研究，提出了设计原则和参数选择范围，该研究可为反尾流自导鱼雷防御系统的仿真信号生成和参数选择提供理论依据。

Receiving Signal Models and Parameters Optimization for Defence System Against Wake Homing Torpedo

The scatter model of ship wake has been presented based on sea surface reverberation theory and acoustic characteristic of bubble to improve defense against the threat of wake homing torpedo. The features of wake echo signal are analysed and calculated quantitatively by combining the measurement data from abroad. The results show that echo pressure depends mainly on size and quantity of bubbles, ship＇s immersion depth and speed, and transmission frequency of array. Moreover, this paper presents the design principle and parameters selection for defense system, such as transmission frequency, pulse width and period, as well as work range and depth.