| FFT复小波及在设备故障信号分析中的应用 |
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| 引用本文： | 何岭松,熊鹰.FFT复小波及在设备故障信号分析中的应用[J].华中科技大学学报(自然科学版),2001,29(10):65-67. |
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| 作者姓名： | 何岭松 熊鹰 |
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| 作者单位： | 华中科技大学机械科学与工程学院 |
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| 摘 要： | 提出一种在频域用数字滤波器定义复小波和展缩小波基，用FFT实现复小波变换的算法。该算法可通过控制滤波器的频率截止特性来生成不同特性的小波函数；通过控制滤波器截止频率位置来改变离散小波变换的频率分辨率。
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| 关 键 词： | 故障诊断 复小波 小波变换 滤波器 设备 |
| 文章编号： | 1000-8616(2001)10-0065-03 |
| 修稿时间： | 2000年9月12日 |
FFT Complex Wavelet and Its Application to Signal Process of Machine Fault Diagnosis |
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| He Lingsong,Xiong Ying.FFT Complex Wavelet and Its Application to Signal Process of Machine Fault Diagnosis[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2001,29(10):65-67. |
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| Authors: | He Lingsong Xiong Ying |
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| Institution: | He Lingsong Xiong Ying |
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| Abstract: | A new algorithm for complex wavelet transform is introduced. The algorithm uses a digital band pass filter to define the complex wavelet in frequency domain. By selecting different orders of the digital band pass filter, the wavelet that has desired time and frequency characteristics can be generated. By changing the cut off frequency of the digital band pass filter, the wavelet can be dilated in different scales. For the complex wavelet that is defined in frequency domain, the FFT and IFFT are used to compute the complex wavelet and do the complex wavelet transformation. |
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| Keywords: | fault diagnosis complex wavelet wavelet transform filter |
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