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在水平变化波导中,匹配场被动定位的计算量非常大,严重阻碍了其工程应用.本文提出了一种水平变化波导中匹配场定位的虚拟时反实现方法,其抛物方程模型计算网格总数远小于匹配场处理,从而大大减小计算代价.与匹配场处理不同,虚拟时反实现方法是一个利用介质互易性和叠加性的后向传输过程.通过在各水听器位置放置虚拟声源,并在搜索区域产生相应的模糊平面,对各个模糊平面进行相应加权求和,获得的定位模糊平面.利用地中海浅海实验数据验证了虚拟时反实现方法的快速性能.
In horizontal waveguide, the computational complexity of passive matching of matching field is very large, which seriously hinders its application. In this paper, we propose a virtual anti-realization method of matching field localization in horizontal-varying waveguide. The parabolic equation model is used to calculate the total number of grids Far less than the matching field processing, thus greatly reducing the computational cost.With the matching field processing is different from the virtual anti-realization method is a use of media reciprocity and superposition of the backward transmission process by placing a virtual sound at each hydrophone position The corresponding fuzzy planes are generated in the search area, and the corresponding fuzzy planes of each fuzzy plane are summed to obtain the positioning fuzzy plane.The fast performance of the virtual anti-realization method is verified by the experimental data of the Mediterranean shallow sea.