Bearing Fault Diagnosis Using Synthetic Quantitative Index-Based Adaptive Underdamped Stochastic Resonance

Table 5

The SNRs of the preprocessed signal, SNR-AOSR output, and SQI-AUSR output.

Fault location	SNR (dB)
	Preprocessed signal	SNR-AOSR output	SQI-AUSR output
Outer race	−3.339	−2.951	4.822
Inner race	−10.300	−7.138	0.946

Note. The preprocessed signal is the SR input. For example, the preprocessed signal is the envelope signal for the outer race fault case.