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• W1992397769 abstract "Abstract In this paper, an original method for bearing fault detection in high speed synchronous machines is presented. This method is based on the statistical process of Welch׳s periodogram of the stator currents in order to obtain stable and normalized fault indicators. The principle of the method is to statistically compare the current spectrum to a healthy reference so as to quantify the changes over the time. A statistic-based indicator is then constructed by monitoring specific harmonic family. The proposed method was tested on two experimental test campaigns for four different speeds and compared to a vibration indicator. The method was evaluated using a rigorous performance evaluation metric. A threshold evaluation was performed and shows that the proposed method is very tolerant to the machine speed. Thus, the use of a unique fault threshold whatever the speed can be considered. Results showed excellent agreement as compared with the vibration indicator, with an overall correlation of r =0.74 and only 4% of false alarms. Performance demonstrated by this novel method was superior to those of a classical energy-based indicator in terms of correlation with the vibration indicator and detection stability. Moreover, results also showed a better robustness of the proposed method since good performance can be obtained with the same detection threshold whatever the speed or the measure campaign whereas it needs to be redefined for each case with the classical indicator. This work shows the advantages of a statistic-based approach in order to increase the robustness of bearing fault detection in permanent-magnet synchronous machines." @default.
• W1992397769 created "2016-06-24" @default.
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• W1992397769 date "2014-06-01" @default.
• W1992397769 modified "2023-10-17" @default.
• W1992397769 title "Statistic-based spectral indicator for bearing fault detection in permanent-magnet synchronous machines using the stator current" @default.
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• W1992397769 doi "https://doi.org/10.1016/j.ymssp.2014.01.006" @default.
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