| 浅海聚焦定位中简化地声模型的应用研究 |
| The application of simplified geoacoustic model in shallow water focalization |
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| DOI： |
| 中文关键词: 聚焦法 匹配场处理 遗传算法 地声参数 |
| 英文关键词:Focalization Matched filed processing Genetic Algorithms Geoacoustic parameter |
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| 中文摘要: |
| 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。本文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。 |
| 英文摘要: |
| 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 increases of inversion parameters adds the complexity in inversion processing. Based on the reflection characteristics of sea bottom, two parameters were used to model sea bottom. Using the inversion benchmark problem, the effectiveness of the simplified geoacoustic model in shallow water focalization was analyzed. The result showed 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. |
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