DOI:10.29111/ijlrst ISRA Impact Factor:3.35, Peer-reviewed, Open-access Journal
Open Access
International Journal of Latest Research in Science and Technology Vol.9 Issue 3, pp 14-20,Year 2020
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Received : 25 June 2020; Accepted : 29 June 2020 ; Published : 30 June 2020
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Article No. | 10995 |
Extracting the signature frequency of the impacts caused by the rolling element bearing fault in the environment of alpha stable distribution noise, the conventional envelope spectrum analysis method based on second-order statistics are not effective. With regard to the difficulty, a new envelope spectrum analysis method is proposed based on fractional lower order covariance. Firstly, the definition and properties of alpha stable distribution are described. The calculation method of fractional lower order statistics is presented. Then, simulation signals are used to compare the effects of the conventional envelope spectrum with the fractional lower order covariance based envelope spectrum in extracting the signature frequency of the impacts. Finally, the conclusion is reached that the fractional lower order covariance based envelope spectrum is valid in extracting the fault signature frequency in both Gaussian and alpha stable distributed background noise.
Copyright © 2020 Bo Zhang et al. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) license which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Bo Zhang, Hui Li* , " Rolling Element Bearing Fault Diagnosis Based On Envelope Spectrum Of Fractional Lower Order Covariance ", International Journal of Latest Research in Science and Technology . Vol. 9, Issue 3, pp 14-20 , 2020
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