A data-driven threshold for wavelet sliding window denoising in mechanical fault detection
A data-driven threshold for wavelet sliding window denoising in mechanical fault detection
复制标题
机械故障检测中小波滑动窗口去噪的数据驱动阈值
DOI:
10.1007/s11431-013-5451-7
复制
发表时间:
2014-03
期刊:
影响因子:
--
通讯作者:
Sun HaiLiang
中科院分区:
文献类型:
--
作者:
Chen YiMin;Zi YanYang;Cao HongRui;He ZhengJia;Sun HaiLiang
Wavelet denoising is an effective approach to extract fault features from strong background noise. It has been widely used in mechanical fault detection and shown excellent performance. However, traditional thresholds are not suitable for nonstationary signal denoising because they set universal thresholds for different wavelet coefficients. Therefore, a data-driven threshold strategy is proposed in this paper. First, the signal is decomposed into different subbands by wavelet transformation. Then a data-driven threshold is derived by estimating the noise power spectral density in different subbands. Since the data-driven threshold is dependent on the noise estimation and adapted to data, it is more robust and accurate for denoising than traditional thresholds. Meanwhile, sliding window method is adopted to set a flexible local threshold. When this method was applied to simulation signal and an inner race fault diagnostic case of dedusting fan bearing, the proposed method has good result and provides valuable advantages over traditional methods in the fault detection of rotating machines.
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DOI:
10.1007/s11431-013-5139-z
发表时间:
2013-01
期刊:
Science China Technological Sciences
影响因子:
--
作者:
ZHANG ZhouSuo;ZI YanYang;YANG ZhiBo;HE ZhengJia
通讯作者:
HE ZhengJia
DOI:
10.1109/89.928915
发表时间:
2001-07-01
期刊:
IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING
影响因子:
--
作者:
Martin, R
通讯作者:
Martin, R
影响因子:
4.7
作者:
Ruqiang Yan;R. Gao
通讯作者:
Ruqiang Yan;R. Gao
DOI:
10.1007/s11431-009-0253-7
发表时间:
2009-10-01
期刊:
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES
影响因子:
--
作者:
Yuan Jing;He ZhengJia;Liu Han
通讯作者:
Liu Han
影响因子:
3.4
作者:
Sun, Hailiang;Zi, Yanyang;He, Zhengjia
通讯作者:
He, Zhengjia