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

Figure 25

The time domain diagram of the collected signals, where (a)–(d) represent normal gear signal, broken teeth fault signal, pitch errors signal, and wear gear signal, respectively. Each signal is listed with 3000 points.

(a)

(b)

(c)

(d)