Feature Extraction Method for Weak Faults Based on Time-Delayed Feedback Mixed Potential Stochastic Resonance

Table 1

Parameters of the gearbox.

Name	Speed (r/min)	Parameters	Characteristic frequency (Hz)
Z1	63	32	33.6
Z2	20.5714	98	33.6
I axis	63	—	1.05
II axis	20.5714	—	0.343
			Rolling	Outer	Inner
Bearing 1	63	DP = 610, d = 62, n = 42	4.9	19.7	24.3
Bearing 2	63	DP = 692, d = 118, n = 53	2.9	22.7	32.6
Bearing 3	20.5714	DP = 610, d = 62, n = 42	1.6	6.4	7.9
Bearing 4	20.5714	DP = 692, d = 118, n = 53	0.9	7.4	10.6