Identification Method of Torpedo-Target Hydroacoustic Signal in Torpedo Sea Trial

In order to efficiently understand torpedo working condition under water in torpedo trials, a third-party monitoring system is usually used to simultaneously record both signals of torpedo and target for subsequent analysis. In this study, sea trial scenario is analyzed, and a fast Fourier transform-based both signals identification method is pro-posed by combining time domain with frequency domain for torpedo-target monitoring system. Identification results of the monitoring system in a sea trial verify the validity of the proposed method.