Research Article
A Morphological Filtering Method Based on Particle Swarm Optimization for Railway Vehicle Bearing Fault Diagnosis
Figure 10
The spectra of collected operations of the rolling element fault signal. (a) Dilation. (b) Erosion. (c) MG. (d) Close. (e) Open. (f) AC&O. (g) DIF. (h) BTH. (i) WTH. (j) CWTH&PBTH. (k) Close-open. (l) Open-close. (m) CMF. (n) GCO&OC. (o) CMFH. (p) MGPO.
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