Weak Fault Detection for Rolling Bearings in Varying Working Conditions through the Second-Order Stochastic Resonance Method with Barrier Height Optimization

Table 4

Output SNR comparison of different rotation speeds.

	Output SNR of USSR (dB)	Output SNR of USAGVSR (dB)	SNR increment (dB)
1200 r/min	−−4.0449	−3.2370	0.8079
2400 r/min	−0.5330	−0.032	0.5002
4800 r/min	−1.2260	−0.4633	0.7627