A Fault Diagnosis Method for One-Dimensional Vibration Signal Based on Multiresolution tlsDMD and Approximate Entropy

Figure 4

The time domain diagram of CWRU signals, where (a)–(d) represent normal bearing signal, inner race fault signal, ball fault signal, and outer race fault signal, coming from 99, 211, 224, and 236 of CWRU, respectively. Each signal is listed with the sample number 6000.

(a)

(b)

(c)

(d)