测量水下目标辐射噪声时，为保障测量结果的准确性，并缓解浅海波导界面反射对测量结果的影响，测试方法需具有恒定束宽波束输出以及较好的空间指向性。对采用双锥阵测量系统的辐射噪声测量方法进行研究，采用二阶锥规划方法对双锥阵波束输出进行设计，结合聚焦变换提出了水平和垂直双向恒定束宽的低旁瓣稳健波束形成方法，实现了浅海波导中对水下目标宽带辐射噪声的测量。在仿真的浅海波导环境中，接收信噪比为5 dB时，测量结果相比单阵元系统以及应用常规波束形成器的测试方法有显著提升。
When measuring the radiated noise of underwater targets, the test method needs to have a constant beam width and good spatial directivity to ensure the accuracy of the measurement results and alleviate the influence of the reflection from the shallow sea waveguide interface. The radiation noise measurement method using the biconical array measurement system is studied, and the beam output of the biconical array is designed by using the second-order cone programming method. Combined with the focus transformation method, a low-sidelobe robust beamformer with constant beamwidth in both horizontal and vertical directions is proposed. The method realizes the measurement of broadband radiation noise of underwater targets in shallow sea waveguides. In the simulated shallow-sea waveguide environment, the measurement results are significantly improved compared with the single element system and conventional beamformer.
2023,45(16): 104-107 收稿日期：2022-12-9
DOI：10.3404/j.issn.1672-7649.2023.16.021
分类号：O427.5
基金项目：国家自然科学基金资助项目（62192711）；中国科学院声学研究所自主部署“目标导向”类资助项目（MBDX202104）
作者简介：曾迪(1990-),男,硕士,助理研究员,研究方向为水声信号处理
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