摘要
为了提高定位算法的环境宽容性,聚焦法将环境参数纳入了寻优空间。聚焦法虽然降低了对环境测量的要求,但是反演参数的增加也增加了反演的复杂性。基于海底反射特性,用两个参数对海底进行建模。通过标准的反演测试问题对简化地声模型在浅海聚焦定位中的有效性进行了分析。结果表明:基于简化地声模型的聚焦定位是可行的。在获得正确定位结果的同时,随着地声参数个数的减少,匹配场处理的便捷性得到了提高。文中引入的简化地声模型是聚焦问题中参数最少的地声模型,它可以有效减少聚焦定位参数维数以提升反演的便捷性。同时,简化地声模型在参数敏感性和耦合性上有较好的表现,这些优点可以保证定位结果的稳健性。
In order to improve the environmental tolerance of localization algorithm,the focalization includes the environment parameters in the search space.Although the stringent requirement of environment measurement is eliminated,the increase of inversion parameters adds the complexity into the inversion process.Based on the reflection characteristics of sea bottom,two parameters are used to model sea bottom.Using the inversion benchmark problem,the effectiveness of the simplified geoacoustic model in shallow sea focalization has been analyzed.The results show that localization based on the simplified geoacoustic model is feasible.While the correct source location is obtained,the convenience of matching field processing increases with the decrease of the number of geoacoustic parameters.The simplified geoacoustic model introduced in this paper is a geoacoustic model with minimum parameters in focalization problems.It can effectively reduce the number of unknows in focalization to improve the convenience of inversion.Meanwhile,the simplified geoacoustic model has a certain advantage on the parameter sensitivity and the inter-coupling,which can guarantee the robustness of location result.
作者
屈科
何树斌
黎章龙
QU Ke;HE Shu-bin;LI Zhang-long(College of Electronics and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,Guangdong Province,China)
出处
《海洋技术学报》
2019年第2期92-97,共6页
Journal of Ocean Technology
基金
广东省自然科学基金资助项目(2014A030310256)
大学生创新创业训练计划资助项目(CXXL2016009
CXXL2017129)
广东海洋大学本科生创新创业团队项目资助(CCTD201822)
关键词
聚焦法
匹配场处理
遗传算法
地声参数
focalization
matched filed processing
genetic algorithms
geoacoustic parameter
