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• W4383227032 abstract "The detection of cracks in rotating machinery is an unresolved issue today. In this work, a methodology for condition monitoring of railway axles is presented, based on crack detection by means of the automatic selection of patterns from the vibration signal measurement. The time waveforms were processed using the Wavelet Packet Transform, and appropriate alarm values for diagnosis were calculated automatically using non-supervised learning techniques based on Change Point Analysis algorithms. The validation was performed using vibration signals obtained during fatigue tests of two identical railway axle specimens, one of which cracked during the test while the other did not. During the test in which the axle cracked, the results show trend changes in the energy of the vibration signal associated with theoretical defect frequencies, which were particularly evident in the direction of vibration that was parallel to the track. These results are contrasted with those obtained during the test in which the fatigue limit was not exceeded, and the test therefore ended with the axle intact, verifying that the effects that were related to the crack did not appear in this case. With the results obtained, an adjusted alarm value for a condition monitoring process was established." @default.
• W4383227032 created "2023-07-06" @default.
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• W4383227032 date "2023-07-04" @default.
• W4383227032 modified "2023-09-30" @default.
• W4383227032 title "Railway Axle Early Fatigue Crack Detection through Condition Monitoring Techniques" @default.
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• W4383227032 doi "https://doi.org/10.3390/s23136143" @default.
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