Composite Fault Diagnosis of Rolling Bearing Based on Optimized Wavelet Packet AR Spectrum Energy Entropy Combined with Adaptive No Velocity Term PSO-SOM-BPNN

Table 1

Fault size of rolling bearing.

Bearing status	Fault size (mm)
Normal	0
Inner ring crack and outer ring crack
Inner ring crack and rolling element pitting	(pit corrosion)
Outer ring crack and rolling element pitting	(pit corrosion)