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

Figure 27

Multiresolution DMD modes of the normal gear signal. We select the first column of that represents the fourth layer slow or fast modes. (a)–(h) represent the modes of , , , , , , , and , respectively. The symbols in Figures 28–30 share the same meanings.

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