Subsea Broadband Reverberation Modeling and Simulation of High-speed Motion Sonar

Subsea reverberation is the main source of interference when torpedoes detect targets in shallow waters where the sound velocity approximately satisfies the negative gradient distribution. In order to obtain the reverberation signal accurately, conveniently and reproducibly, and study its statistica...

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Bibliographic Details
Published in水下无人系统学报 Vol. 31; no. 2; pp. 285 - 290
Main Authors Jiayi YANG, Yunchuan YANG, Yongsheng LI, Lei SHI, Xiangfeng YANG
Format Journal Article
LanguageChinese
Published Science Press (China) 01.04.2023
Subjects
bellhop model
element scattering model
motion platform
subsea reverberation
torpedo
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ISSN2096-3920
DOI10.11993/j.issn.2096-3920.2022-0003

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Summary:Subsea reverberation is the main source of interference when torpedoes detect targets in shallow waters where the sound velocity approximately satisfies the negative gradient distribution. In order to obtain the reverberation signal accurately, conveniently and reproducibly, and study its statistical characteristics, this paper proposes a high-speed motion sonar subsea broadband reverberation simulation method based on the Bellhop model. In this method, the seabed area that contributes to the reverberation is divided into several non-uniform scattering units, and the scattering characteristic function of each unit is calculated. The propagation loss is calculated by the Bellhop model. Subsea reverberation analog signal with main influencing factors such as doppler shift. Finally, the time-frequency domain analysis and similarity comparison between the simulated signal and the actual flight signal are carried out. The results show that using the dot product ratio of the probability density distribution of the
ISSN:2096-3920
DOI:10.11993/j.issn.2096-3920.2022-0003