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Stationary Wavelet-Fourier Entropy and Kernel Extreme Learning for Bearing Multi-Fault Diagnosis

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Escuela de Ingeniería Informática, Pontificia Universidad Católica de Valparaíso, Valparaíso 2374631, Chile
2
Facultad de Ingeniería, Universidad Nacional de Chimborazo, Chimborazo 060108, Ecuador
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(6), 540; https://doi.org/10.3390/e21060540
Received: 8 May 2019 / Revised: 23 May 2019 / Accepted: 26 May 2019 / Published: 28 May 2019
Bearing fault diagnosis methods play an important role in rotating machine health monitoring. In recent years, various intelligent fault diagnosis methods have been proposed, which are mainly based on the features extraction method combined with either shallow or deep learning methods. During the last few years, Shannon entropy features have been widely used in machine health monitoring, improving the accuracy of the bearing fault diagnosis process. Therefore, in this paper, we consider the combination of multi-scale stationary wavelet packet analysis with the Fourier amplitude spectrum to obtain a new discriminative Shannon entropy feature that we call stationary wavelet packet Fourier entropy (SWPFE). Features extracted by our SWPFE method are then passed onto a shallow kernel extreme learning machine (KELM) classifier to diagnose bearing failure types with different severities. The proposed method was applied on two experimental vibration signal databases of a rolling element bearing and compared to two recently proposed methods called stationary wavelet packet permutation entropy (SWPPE) and stationary wavelet packet dispersion entropy (SWPPE). Based on our results, we can say that the proposed method is able to achieve better accuracy levels than both the SWPPE and SWPDE methods using fewer failure features. Further, as our method does not require any hyperparameter calibration step, it is less dependent on user experience/expertise. View Full-Text
Keywords: stationary wavelet packet transform; multi-scale entropy; Fourier amplitude spectrum kernel extreme learning machine stationary wavelet packet transform; multi-scale entropy; Fourier amplitude spectrum kernel extreme learning machine
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Rodriguez, N.; Barba, L.; Alvarez, P.; Cabrera-Guerrero, G. Stationary Wavelet-Fourier Entropy and Kernel Extreme Learning for Bearing Multi-Fault Diagnosis. Entropy 2019, 21, 540.

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