Bearing Fault Diagnosis Based on Collaborative Representation Using Projection Dictionary Pair

Figure 4

Simulated vibration signals with different parameters: (a) normal signal using  = 1000 Hz; (b) fault signal 1 using  = 1000 Hz and  = 50 Hz (m = 1); (c) fault signal 2 using  = 2000 Hz and  = 60 Hz (m = 2); (d) fault signal 3 using  = 3000 Hz and  = 70 Hz (m = 3); (e) fault signal 4 using  = 4000 Hz and  = 100 Hz (m = 4); (f) fault signal 5 using  = 4500 Hz and  = 150 Hz (m = 5).

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