基于三维声场空间特征的故障诊断方法研究

侯俊剑1,2,吴艳灵1,2,何文斌1,2,房占鹏1,2,肖艳秋1,2

振动与冲击 ›› 2018, Vol. 37 ›› Issue (13) : 1-6.

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (13) : 1-6.
论文

基于三维声场空间特征的故障诊断方法研究

  • 侯俊剑1,2,吴艳灵1,2,何文斌1,2,房占鹏1,2,肖艳秋1,2
作者信息 +

Acoustic fault diagnosis method based on spatial features of a 3D sound field

  • HOU Jun-jian1,2 ,WU Yan-ling1,2 ,HE wen-bin1,2 ,FANG Zhan-peng1,2,XIAO Yan-qiu1,2
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文章历史 +

摘要

基于机械表面声压幅值分布变化的声像故障诊断方法改善了传统的采用单点测试的声诊断鲁棒性,但由于忽略空间相位信息,在弱故障工况下存在识别率低和诊断困难等问题。针对上述问题,运用信息映射和融合的思想,提出了一种基于三维声场物理空间特征的声诊断方法。首先利用近场声全息技术构建弱故障工况的辐射声场,将声源的相位信息映射到空间域,得到三维场点声压分布;然后在一个波长范围内序列拾取13个辐射声场空间断层,对每个断层面提取Gabor小波特征,并构建声场空间特征模型进行诊断识别。仿真和实验研究结果表明基于三维空间声场的故障诊断方法能有效改善弱故障工况的诊断鲁棒性,进一步拓展了声成像技术的工程应用,并为声学故障诊断提供了新思路。

Abstract

The fault diagnosis method based on acoustic images improves the robustness of traditional acoustic diagnosis with the single-channel test technique. But the problems of lower recognition rate and harder diagnosis exist under weaker fault conditions due to neglecting the spatial phase information of acoustic images. Aiming at the problems mentioned above, an acoustic fault diagnosis method based on spatial features of a 3D sound field was proposed using an idea of information mapping and fusion. Firstly, a radiation sound field under weaker fault conditions was constructed employing the near-field acoustic holography technique. The phase information of the sound source was mapped into spatial domain. The point sound pressure distribution of a 3D field was obtained. Then, 13 spatial slips of the radiation sound field were picked up sequentially within a wavelength, and each spatial slip’s Gabor wavelet features were extracted to build a feature model of the spatial sound field for recognition and diagnosis. The simulation and test results showed that the proposed acoustic fault diagnosis method based on spatial features of a 3D sound field can effectively improve the fault diagnosis robustness under weaker fault conditions to further extend the engineering application of acoustic imaging technique, it provides a new idea for the acoustic fault diagnosis.

关键词

三维声场 / 小波特征 / 近场声全息 / 故障诊断

Key words

 3D sound field / wavelet features / near-field acoustic holography / fault diagnosis

引用本文

导出引用
侯俊剑1,2,吴艳灵1,2,何文斌1,2,房占鹏1,2,肖艳秋1,2. 基于三维声场空间特征的故障诊断方法研究[J]. 振动与冲击, 2018, 37(13): 1-6
HOU Jun-jian1,2,WU Yan-ling1,2,HE wen-bin1,2,FANG Zhan-peng1,2,XIAO Yan-qiu1,2. Acoustic fault diagnosis method based on spatial features of a 3D sound field[J]. Journal of Vibration and Shock, 2018, 37(13): 1-6

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