Research Article
A Morphological Filtering Method Based on Particle Swarm Optimization for Railway Vehicle Bearing Fault Diagnosis
Table 8
The kurtosis values of collected operations of the inner-race fault signal.
| | Operator | Kurtosis |
| | Dilation | 1.19 | | Morphological gradient (MG) | 15.65 | | Open | 1.69 | | Difference filter (DIF) | 14.65 | | White top-hat transform (WTH) | 32.07 | | Close-open (CO) | 1.05 | | Combination morphological filter (CMF) | 1.16 | | Morphology gradient product operation (MGPO) | 3.56 | | Erosion | 1.96 | | Close | 1.90 | | Close and open average (AC&O) | 1.18 | | Black top-hat transform (BTH) | 26.71 | | Combination of WTH and positive BTH (CWTH&PBTH) | 15.06 | | Open-close (OC) | 1.61 | | CO and OC gradient (GCO&OC) | 12.90 | | Combination morphological filter hat (CMFH) | 15.06 |
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