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Abstract:
The appearance of repetitive transients in a vibration signal is one typical feature of faulty rolling element bearings. However, accurate extraction of these fault-related characteristic components has always been a challenging task, especially when there is interference from large amplitude impulsive noises. A frequency domain multipoint kurtosis (FDMK)-based fault diagnosis method is proposed in this paper. The multipoint kurtosis is redefined in the frequency domain and the computational accuracy is improved. An envelope autocorrelation function is also presented to estimate the fault characteristic frequency, which is used to set the frequency hunting zone of the FDMK. Then, the FDMK, instead of kurtosis, is utilized to generate a fast kurtogram and only the optimal band with maximum FDMK value is selected for envelope analysis. Negative interference from both large amplitude impulsive noise and shaft rotational speed related harmonic components are therefore greatly reduced. The analysis results of simulation and experimental data verify the capability and feasibility of this FDMK-based method.
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MEASUREMENT SCIENCE AND TECHNOLOGY
ISSN: 0957-0233
Year: 2018
Issue: 5
Volume: 29
1 . 8 6 1
JCR@2018
2 . 0 4 6
JCR@2020
ESI Discipline: ENGINEERING;
ESI HC Threshold:108
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 27
SCOPUS Cited Count: 41
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 7
Affiliated Colleges: