Deconvolution model for the cyclostationary acoustic source beamforming with high spatial resolution

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-09-24 DOI:10.1016/j.apacoust.2025.111085

Jianyuan He , Youhong Xiao , Chenyu Zhang , Huizhi Ji , Zhigang Liu

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引用次数: 0

Abstract

Given the cyclostationarity inherent in the noise emitted by rotating machinery, cyclostationary conventional beamforming (CSCBF) emerges as an effective tool for visually pinpointing noise sources. However, CSCBF faces challenges similar to those of conventional beamforming (CBF), notably poor spatial resolution at lower frequencies and the manifestation of ghost sources at higher frequencies. To address these limitations, this paper introduces a novel deconvolution model that incorporates a non-convex sparse penalty, termed Cyclo-GMCP. Initially, the acoustic map generated by CSCBF is obtained, and subsequently, the point spread function (PSF) within CSCBF is derived to establish the deconvolution model. To ensure high spatial resolution in localization results, a generalized minimax-concave penalty (GMCP) is imposed on the acoustic map. Numerical examples and real-data experiments validate the efficacy of the proposed Cyclo-GMCP method, demonstrating its ability to address the aforementioned issues by distinguishing acoustic sources with different cyclic frequencies, displaying narrower main lobes, and reducing side lobes compared to CSCBF.

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高空间分辨率循环平稳声源波束形成的反褶积模型

考虑到旋转机械发出的噪声固有的循环平稳性，循环平稳性常规波束形成（CSCBF）成为一种有效的视觉定位噪声源的工具。然而，CSCBF也面临着与传统波束形成（CBF）类似的挑战，特别是在低频时空间分辨率较差，在高频时表现为鬼源。为了解决这些限制，本文引入了一种新的反卷积模型，该模型包含一个非凸稀疏惩罚，称为环- gmcp。首先获得CSCBF生成的声图，然后推导CSCBF内的点扩散函数（PSF），建立反卷积模型。为了保证定位结果的高空间分辨率，在声学地图上施加了广义极小-凹惩罚（GMCP）。数值算例和实际数据实验验证了该方法的有效性，表明与CSCBF相比，该方法能够区分不同循环频率的声源，显示更窄的主瓣，减少侧瓣，从而解决了上述问题。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.