Detrended Fluctuation Analysis and Hough Transform Based Self-Adaptation Double-Scale Feature Extraction of Gear Vibration Signals

Table 1

Classification results with proposed method (DFA1).

Gear fault	Diagnosis results				Recognition rate
	NOR	SCR	TL	CPE
NOR	49	0	1	0	98%
SCR	0	46	4	0	92%
TL	5	3	42	0	84%
CPE	0	0	0	50	100%

NOR: “Normal”; SCR: “Scratched”; TL: “Toothless”; CPE: “Circular pitch error.”