Research Article
Train Wheelset Bearing Multifault Impulsive Component Separation Using Hierarchical Shift-Invariant Dictionary Learning
Figure 13
Separated impulsive components for the roller fault using the proposed method: (a) SES values for the different number of iterations; (b) separated impulse signal for the roller fault; (c) Fourier spectrum of (b); (d) Hilbert envelope spectrum of (c).
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