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1.滁州职业技术学院 电气工程学院,滁州 239000
2.山西北方机械制造有限责任公司,太原 030009
黄斯琪,女,1994年生,安徽巢湖人,硕士研究生,助教;主要研究方向为设备状态监测与故障诊断;huangsiqi@chzc.edu.cn。
谭志银,男,1983年生,安徽滁州人,硕士研究生,副教授;主要研究方向为机电一体化;tanzhiyin@chzc.edu.cn。
收稿日期:2025-01-16,
修回日期:2025-03-29,
纸质出版日期:2025-09-15
移动端阅览
黄斯琪,张信群,刘世杰,等. 频带优选傅里叶分解方法及其在滚动轴承故障诊断中的应用[J]. 机械传动,2025,49(9):151-161.
HUANG Siqi,ZHANG Xinqun,LIU Shijie,et al. Frequency band optimization Fourier decomposition method and its application in fault diagnosis of rolling bearings[J]. Journal of Mechanical Transmission,2025,49(9):151-161.
黄斯琪,张信群,刘世杰,等. 频带优选傅里叶分解方法及其在滚动轴承故障诊断中的应用[J]. 机械传动,2025,49(9):151-161. DOI: 10.16578/j.issn.1004.2539.2025.09.019.
HUANG Siqi,ZHANG Xinqun,LIU Shijie,et al. Frequency band optimization Fourier decomposition method and its application in fault diagnosis of rolling bearings[J]. Journal of Mechanical Transmission,2025,49(9):151-161. DOI: 10.16578/j.issn.1004.2539.2025.09.019.
目的
2
傅里叶分解方法是一种能够根据信号频谱特征自适应确定模态分量的方法。然而,该方法在提取非平稳信号的模态分量时,容易产生大量无效窄带分量,不利于故障特征的精准识别。为解决这一问题,提出一种频带优选傅里叶分解方法(Frequency Band Optimization Fourier Decomposition Method
FBO-FDM)。
方法
2
首先,以傅里叶变换为基础,按照高频至低频的顺序对原始傅里叶谱进行扫描分割,获取初始分割边界;其次,提出一种频带重构策略,利用多尺度排列熵偏均值(Partial Mean of Multi-scale Permutation Entropy
PMMPE)对各分割边界内的频带信息进行量化处理,将PMMPE大于其均值的频带保留,去除无效窄带分量;最后,采用自适应多尺度形态学滤波对重构分量进行滤波处理,去除噪声及无关分量的影响。采用所提方法对滚动轴承仿真信号进行分析,并与傅里叶分解方法(Fourier Decomposition Method
FDM)、经验小波变换(Empirical Wavelet Transform
EWT)和变分模态分解(Variational Mode Decomposition
VMD)方法进行了对比。
结果
2
结果表明,所提方法能够更有效地识别出故障特征频率,并且具有更高的信噪比;同时,其对有色噪声也有较好的降噪效果。将所提方法应用于实测振动信号分析中,进一步验证了所提方法频带划分及故障诊断能力的优越性。
Objective
2
The Fourier decomposition method (FDM) is a method that adaptively determines modal components based on signal spectral characteristics. However
when extracting modal components from non-stationary signals
this method tends to generate numerous invalid narrow-band components
which hinders the precise identification of fault features. To address this issue
a frequency band optimization Fourier decomposition method (FBO-FDM) was proposed.
Methods
2
Firstly
based on Fourier transform
the original Fourier spectrum was scanned and segmented in the order from high frequency to low frequency to obtain initial segmentation boundaries. Secondly
a frequency band reconstruction strategy was established.The partial mean of multi-scale permutation entropy (PMMPE) was used to quantify the frequency band information within each segmentation boundary
and bands with PMMPE values greater than the mean were retained to remove invalid narrow-band components. Finally
adaptive multi-scale morphological filtering was applied to the reconstructed components to eliminate the influence of noise and irrelevant components. The proposed method was analyzed using rolling bearing simulation signals and compared with FDM
empirical wavelet transform (EWT)
and variational mode decomposition (VMD).
Results
2
The results show that FBO-FDM can more effectively identify fault characteristic frequencies with a higher signal-to-noise ratio (SNR)
and exhibites better noise reduction performance for colored noise. When applied to the analysis of measured vibration signals
the comparative results further validate the superiority of FBO-FDM in frequency band division and fault diagnosis capability.
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