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

Table 3

Output SNR comparison of different fault types.

	Output SNR of SR (dB)	Output SNR of TFSR (dB)	Output SNR of USSR (dB)	Output SNR of USAGVSR (dB)
BPFO	−0.5710	−0.5821	−0.5330	−0.0328
BPFI	−0.7629	−0.7751	−0.7650	−0.4319
BSF	−0.6003	−0.5969	−0.5924	−0.1355