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

Figure 31

UC-DLA with parameters for identification of wheelset bearing roller fault. (a) Learned shock response 1; (b) learned shock response 2; (c) sparse reconstruction signal corresponding to shock response 1; (d) sparse reconstruction signal corresponding to shock response 2; (e) locally zoomed figure of the impulses shown in Figure 31(c); (f) locally zoomed figure of the impulses shown in Figure 31(d); (g) envelope spectrum of signal in Figure 31(c); and (h) envelope spectrum of signal in Figure 31(d).

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