Research Article

An Enhanced Version of Second-Order Synchrosqueezing Transform Combined with Time-Frequency Image Texture Features to Detect Faults in Bearings

Figure 9

Normalized energy as a function of the number of coefficients for experimental signals: (a) fault-free, (b) ball fault, (c) inner ring fault, (d) outer ring fault, and (e) combined fault of inner and outer rings.
(a)
(b)
(c)
(d)
(e)