Title Fault Diagnosis Method of Gearbox Multifeature Fusion Based on Quadratic Filter and QPSO-KELM

Table 4

Comparison of fault diagnosis results.

	ELM		PSO-KELM		QPSO-KELM
	Without filter	Filter	Without filter	Filter	Without filter (%)	Filter (%)
Training accuracy	53.34	75.67	72.67	98.17	79.83	100
Testing accuracy	53.34	75.67	66.67	98.75	70.83	100