| 离散余弦变换在滚动轴承故障诊断中的应用 |
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| 引用本文： | 程军圣,于德介.离散余弦变换在滚动轴承故障诊断中的应用[J].振动与冲击,2000,19(3):20-22. |
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| 作者姓名： | 程军圣 于德介 |
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| 作者单位： | 湖南大学振动中心,长沙,410082 |
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| 摘 要： | 本文探讨了应用离散余弦变换分析滚动轴承故障的方法，采用小波基将滚动轴承振动信号变换到时间－尺度域，对高频段的小波系数用离散余弦变换进行包络分析。通过对滚动轴承具有外圈缺陷、内圈缺陷的情况下振动信号的分析，说明这种方法可以有效的用于效地用于滚动轴承的故障诊断。
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| 关 键 词： | 滚动轴承 故障诊断 小波包 离散余弦变换 |
| 修稿时间： | ： |
APPLICATION OF DISCRETE COSINE TRANSFORM TO FAULT DIAGNOSIS FOR ROLLER BEARING |
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| Cheng Junsheng,Yu Dejie.APPLICATION OF DISCRETE COSINE TRANSFORM TO FAULT DIAGNOSIS FOR ROLLER BEARING[J].Journal of Vibration and Shock,2000,19(3):20-22. |
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| Authors: | Cheng Junsheng Yu Dejie |
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| Abstract: | A method of fault diagnosis for roller bearing by using discrete cosine transform is proposed in the paper.Vibration signal of roller bearing is translated into time-scale representation by using the wavelet bases.Discrete cosine transform is used to make an envelope analysis of wavelet coefficients of high scales,representing the high frequency components.By analyzing vibration signal of roller bearing with outer-race fault or inner-race fault,it is confirmed that wavelet coefficients envelope analysis using discrete cosine transform can be applied in fault diagnosis successfully. |
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| Keywords: | roller bearing fault diagnosis wavelet packet discrete cosine transform envelope analysis |
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