Performance Prediction Of Buoy Sonar Based On Deep Sea Sound Speed Extrapolation Algorithm

With the continuous development of marine technology,buoy sonar is playing an increasingly important role in these fields such as marine environment monitoring and underwater target detection.However,the performance of the buoy sonar is susceptible to factors such as the ocean sound speed profile,the boundary between the sea surface and the seafloor,thus its anti-submarine combat capability is greatly reduced.At the same time,traditional ocean sound speed profiles are obtained mainly by experimental measurements or inquiring historical data.The data are extremely rare when aiming at specific deep sea scenarios.In this paper,in accordance with the changing characteristics of the marine environment,the effects of different environmental factors on the performance of the buoy sonar are thoroughly studied.A deep sea sound speed extrapolation method is proposed,which greatly reduces the difficulty of obtaining deep sea sound speed profile in harsh environment.The purpose of this study is to establish the buoy sonar performance prediction models in different sea areas.The research starts from the forecast method of sonar performance,the construction of ocean sound speed profile and the performance forecast of buoy sonar in different sea areas.First of all,this paper studies the factors that affect the propagation of ocean acoustic,and evaluates the impact of each factor on the propagation loss.According to the sonar equation,the parameter models of the sonar equation in the marine environment are analyzed,and the performance prediction of the active and passive buoy sonar is theoretically investigated.Secondly,this paper proposes a deep sea sound speed extrapolation method.This method uses some upper-layer sound speed profiles for extrapolation processing,and obtains extrapolation results that are in good agreement with the measured values,which greatly reduces the difficulty of obtaining deep sea sound speed profiles in harsh environments.The acoustic field calculation results of the extrapolation of sound speed and the measured values are compared,then the influence of the deep sea sound speed extrapolation method on the ocean acoustic field is analyzed.A deep sea sound speed extrapolation method based on optimal depth is studied.Under the condition that the partial sound speed profile is known,the interpolation depth with the best interpolation effect is obtained,then the extrapolation processing is carried out.Finally,a common interpolation order and interpolation length that meet different conditions of sound speed profile are found in a specific sea area.Finally,this article summarizes the best working depth law of buoy sonar under different conditions of sound speed profile,analyzes the influence of the change of sound speed profile on the performance of buoy sonar after processing by deep sea sound speed extrapolation method,and predicts the buoy sonar performance in different marine environments.Based on the WOA and Argo data sets,the performance forecast of buoy sonar was carried out on the sea area near Yongxing Island and Dongsha Island in the South China Sea,the Philippine sea area in the Pacific Ocean and the sea area near the Hawaii Island,Which provides a reference for the placement of sonar buoys.