KPCA and AE Based Local-Global Feature Extraction Method for Vibration Signals of Rotating Machinery

Table 2

Parameter configuration with mean classification accuracy higher than 95%.

Ns	Number of spectrum line	Vs
		1		2		3
		Dimension of global feature	Mean accuracy (%)	Dimension of global feature	Mean accuracy (%)	Dimension of global feature	Mean accuracy (%)
2	512	2	—	4	—	6	95.56
4	256	4	—	8	96.67	12	96.67
8	128	8	97.78	16	96.67	24	96.67
16	64	16	97.78	32	97.78	48	95.56
32	32	32	96.67	64	98.89	96	—
64	16	64	96.67	128	96.67	192	—
128	8	128	96.67	256	—	384	—