障板表面圆环阵频率不变响应波束形成方法研究  

Frequency-invariant beamforming method for circular sensor arrays mounted on the baffle surface

作　　者：张英豪 汪勇[1] 杨益新[1] ZHANG Yinghao;WANG Yong;YANG Yixin(School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an 710072, China)

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《哈尔滨工程大学学报》2021年第9期1249-1255,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金面上项目(61971353,11604259);中国科协青年人才托举工程项目(2018QNRC001);陕西省自然科学基础研究计划(2019JQ-297).

摘　　要：针对现有频率不变响应波束形成方法较少考虑平台散射影响的问题,本文研究了分层圆柱障板表面圆环阵频率不变响应波束形成方法,建立了多层介质圆柱散射声场模型,仿真获得了频率不变响应波束形成方法在不同频率、障板材料和界面厚度下的性能变化规律,给出了理论分析。仿真结果表明:圆柱障板的存在、圆柱障板材质和厚度的合理选取均有利于频率不变响应波束形成方法在适用频率范围内的整体稳健性。To address the problem that the existing frequency-invariant(FI)beamforming method does not consider the effect of platform scattering,an FI beamforming method for circular sensor arrays mounted on multilayer cylindrical baffle surface is investigated,and a model for the multilayer dielectric cylinder scattering acoustic field is built in this study.The influence laws of incident frequencies,baffle material,and interface thickness on the accuracy of performance are determined through simulations and analyzed theoretically.The simulation results show that a reasonable selection of materials and thickness is conducive to the robustness of the FI beamforming method in the applicable frequency range.

关 键 词：圆环阵 频率不变性 超指向性 波束形成 散射场 多层介质圆柱 障板 稳健性 

分 类 号：TB564[交通运输工程—水声工程]