Research Article
A Morphological Filtering Method Based on Particle Swarm Optimization for Railway Vehicle Bearing Fault Diagnosis
Figure 7
The spectra of collected operations of the outer-race 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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