| 小波域相关滤波法及其早期故障预示应用 |
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| 引用本文： | 李富才,何正嘉,陈进. 小波域相关滤波法及其早期故障预示应用[J]. 振动工程学报, 2005, 18(2): 145-148 |
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| 作者姓名： | 李富才 何正嘉 陈进 |
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| 作者单位： | 1. 上海交通大学振动、冲击、噪声国家重点实验室,上海,200030
2. 西安交通大学机械工程学院,陕西,西安,710049 |
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| 基金项目： | 国家自然科学基金重点资助项目(50335030) |
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| 摘 要： | 噪声是影响机械设备早期故障预示正确性的主要因素。根据相关分析理论和小波阈值降噪理论,提出了小波域相关滤波法。它是一个迭代的过程,通过自适应的选择滤波过程参数,可以对信号进行良好的降噪;同时也不会弱化信号中的弱故障信息。通过对旋转机械早期不平衡和不对中故障信号分析,结果表明小波域相关滤波法对机械设备早期故障预示是有效的。
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| 关 键 词： | 故障诊断 小波变换 相关滤波 降噪 早期故障预示 |
| 文章编号： | 1004-4523(2005)02-0145-04 |
| 修稿时间： | 2004-05-17 |
Wavelet transform domain correlation filter and its application in incipient fault prognosis |
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| LI Fu-cai,HE Zheng-jia,CHEN Jin. Wavelet transform domain correlation filter and its application in incipient fault prognosis[J]. Journal of Vibration Engineering, 2005, 18(2): 145-148 |
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| Authors: | LI Fu-cai HE Zheng-jia CHEN Jin |
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| Affiliation: | LI Fu-cai~1,HE Zheng-jia~2,CHEN Jin~1 |
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| Abstract: | Noise is the biggest obstacle that makes the incipient fault prognosis results uncorrected. According to the theories of correlation analysis and threshold de-noising by wavelets, wavelet transform domain correlation filter (WTDCF) is constructed. WTDCF is an iterative process. By selecting the process parameters adaptively, WTDCF can de-noise signal efficiently. More important, the faint component in the signal will become stronger compared with the noise component. WTDCF method is used to analyze the real signals collected from a bearing that has incipient unbalance and misalignment faults. Results show that WTDCF method is effective for bearing incipient fault prognosis. |
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| Keywords: | fault diagnosis wavelet transform correlation filtering denoising incipient fault prognosis |
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