码头环境下基于组合阵的高分辨噪声源聚焦定位

摘要

针对码头测试中噪声源定位受到多途效应影响的问题,本文提出了一种码头环境下基于组合阵列的高分辨噪声源近场聚焦定位方法.该方法采用在均匀声压阵中配置矢量传感器的基阵形式,充分利用多途信道信息生成与实际码头信道声传播特性相匹配的空间聚焦波束;结合被动时间反转技术得到更尖的聚焦峰和更强的背景抑制能力;同时引入最差性能优化思想减小了各种失配误差引起的高分辨聚焦定位方法性能下降.仿真和水池试验结果表明该方法在码头复杂声场环境下可以实现噪声源高分辨聚焦定位,且具有较强稳健性.%The localization of a noise source is influenced by the multipath effect in a wharf test ; hence, a high-resolution noise source localization method based on a combination array is proposed for measurement in a environment.This method applies an array form that provides a vector sensor in an even sound pressure array. Multipath information is utilized to generate a space-focusing wave beam matching actual wharf channel sound propagation properties.In combination with the passive time reversal technology, a sharper focusing peak and a more powerful background constraint ability are obtained.Meanwhile, the worst performance optimization is introduced to reduce the performance decline of the high-resolution focusing positioning method caused by vari-ous mismatch errors.The simulation and water-tank experiment results show that the method can realize a high-resolution focusing positioning of a noise source in a complex sound field environment of wharf.In addi-tion, the robustness is excellent.