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光尾流自导鱼雷激光探测系统所获取的信号是水体和舰船气泡尾流共同产生的后向散射光信号,从该信号中提取出舰船气泡尾流的信息是光尾流自导鱼雷的关键技术。由于水体所产生的后向散射光信号强度大于舰船气泡尾流所产生的后向散射光信号,两个信号在时域和频域里的特征又十分接近,因此难以用传统滤波方法将其分离以提取有用的尾流信息。提出了采用盲源分离和独立成分分析的方法来处理激光探测系统所获取的信号,研究了盲源分离的算法,编制程序对课题组在激光探测舰船尾流海上试验所获取的数据进行了计算,结果表明:该方法可在不同探测条件下有效地将舰船气泡尾流场所产生的后向散射光信号从原始信号中提取出来,有利于系统正确判别舰船尾流及其特征。
The signals obtained by the optical wake-by-turn torpedo laser detection system are the backscattered optical signals jointly generated by the wake of the water body and the ship’s bubble, and the information of wakes from the signal extracted from the wake of the warship is the wakes The key technology. Since the intensity of backscattered optical signal generated by water body is greater than the backscattered optical signal generated by the wake of the ship’s bubble, the characteristics of the two signals in the time domain and the frequency domain are very close. Therefore, it is difficult to apply the traditional filtering method Separation to extract useful wake information. The method of blind source separation and independent component analysis is proposed to deal with the signal obtained by laser detection system. The algorithm of blind source separation is studied. The data obtained by the research team on the laser wake-wakeboard sea trial are studied. The results show that the proposed method can effectively extract the backscattered optical signal from the wake of the ship’s wake in different detection conditions, which helps the system to correctly determine the wake and its characteristics.