Fault Detection and Behavior Analysis of Wheelset Bearing Using Adaptive Convolutional Sparse Coding Technique Combined with Bandwidth Optimization

Figure 12

(a) Fourier spectrum of signal in Figure 11(c); (b) Fourier spectrum of signal in Figure 11(d); (c) and (d) envelope spectrums of signals in Figures 11(c) and 11(d), respectively; and (e) comparison between envelope spectrum of real impulses and obtained envelope spectrum (envelope spectrums in Figures 12(c) and 12(d)).

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