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

Figure 31

The frequency domain diagram of multiresolution DMD modes of the normal gear signal, where (a)–(h) are corresponding to signals in Figure 27, respectively.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)