Rolling Element Bearing Performance Degradation Assessment Using Variational Mode Decomposition and Gath-Geva Clustering Time Series Segmentation

Figure 7

The envelope spectrum of BLIMF1 to BLIMF4 of #600.

(a) BLIMF1’s envelope

(b) BLIMF2’s envelope

(c) BLIMF3’s envelope

(d) BLIMF4’s envelope