A Novel Detrended Fluctuation Analysis Method for Gear Fault Diagnosis Based on Variational Mode Decomposition

Table 1

Classification results based on VMD-DFA and STS-DFA method in resubstitution test.

Method	Normal	Scratched	Toothless	CPE	TRR
VMD-DFA	(79/80)	(78/80)	(78/80)	(80/80)	(315/320)
(Resb)	98.75%	97.5%	97.5%	100%	98.44%
STS-DFA	(77/80)	(71/80)	(68/80)	(80/80)	(296/320)
(Resb)	96.25%	88.75%	85%	100%	92.5%

CPE: circular pitch error; TRR: total recognition rate; VMD: variational mode decomposition; DFA: detrended fluctuation analysis; STS: small time scale; Resb: resubstitution test.