基于改进EMD的齿轮箱故障特征提取方法研究
According to Empirical mode decomposition（EMD）generally appearing to end effects in signal processing,combining features of non-stationary vibration signal from gearbox early faults,an improved EMD method is proposed.The method is based on the combination of piecewise Hermit interpolation of order t...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Journal of Mechanical Transmission
2014-01-01
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| Series: | Jixie chuandong |
| Online Access: | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2014.05.028 |
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| Summary: | According to Empirical mode decomposition（EMD）generally appearing to end effects in signal processing,combining features of non-stationary vibration signal from gearbox early faults,an improved EMD method is proposed.The method is based on the combination of piecewise Hermit interpolation of order three with extreme truncation and correlation coefficient screening method.Firstly,the piecewise Hermit interpolation of order three is used to calculate envelopes.Secondly,the signal and envelopes are truncated at the extreme the shortest distance to endpoints,and the middle of them is left for further processing.Lastly,after decomposition all of intrinsic mode functions（IMFs）are used to calculate correlation coefficients with the original signal,so as to find out main IMFs to be made further analysis.The results show that the improved EMD method can extract faults feature in gearbox effectively. |
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| ISSN: | 1004-2539 |