声速剖面快速反演浮标系统与算法研究  

Research on the Sonobuoy System and Algorithm for Rapid Inversion of Sound Speed Profile

作　　者：张维[1] 

机构地区：[1]中国船舶重工集团公司第710研究所,湖北宜昌443003

出　　处：《兵工学报》2015年第5期879-884,共6页Acta Armamentarii

基　　金：国家安全重大基础研究项目(613110010202);国家自然科学基金项目(11104045)

摘　　要：为了快速获取大面积海域声速剖面(SSP),介绍了一套具有全球差分定位(DGPS)、短波通信等功能的声纳浮标系统。传统的基于声传播时间的声速剖面反演,由于需要搜索不同声速剖面时的特征声线,存在速度慢的问题。为此,提出采用微扰法快速计算声传播时间,并以之为代价函数反演了南海某海域声速剖面。实验结果表明:该声纳浮标在4级海况下具有良好的可靠性与稳定性;与传统方法相比,虽然微扰法反演的精度下降了近1倍,但是计算时间由10 h减少到了3 s;文中所提出的声纳系统与反演算法能满足声速剖面海上实时监测的要求。A sonobuoy system with the functions of difference global positioning system （DGPS） and short-wave communication is presented to acquire the sound speed profile （SSP） in a large area of sea as quickly as possible.The conventional SSP inversion algorithms based on sound transmission time have to trace eigen ray for every SSP,influencing the inversion speed.A perturbation method is proposed to calculate the sound transmission time quickly,and the time is used as cost function to invert SSP in some area of South China Sea.Results indicate that the sonobuoy is stable and reliable under four level sea state.Although the root mean square （RMS） error is doubled in comparison with that by conventional algorithms,the calculating time can be reduced from 10 hours to 3 seconds by perturbation method.Therefore the sonobuoy system and inversion algorithm introduced in this paper can satisfy the demand of real-time SSP monitoring.

关 键 词：声学 声速剖面反演 微扰法 声纳浮标 声传播时间 

分 类 号：TB566[交通运输工程—水声工程]