Fault Diagnosis of Nonlinear Analog Circuit Based on Generalized Frequency Response Function and LSSVM Classifier Fusion

Table 4

The fault recognition rate of Sallen Key filter.

Fault number	Fault type	Recognition rate
		LSSVM fusion algorithm (%)	Single LSSVM (polynomial kernel function) (%)	Single LSSVM (Gaussian radial basis kernel function) (%)	Multikernel LSSVM (%)
F0	Normal	94	85	88	90
F1	R4 increased	81	69	71	73
F2	R4 decreased	96	87	89	88
F3	R5 increased	97	86	88	91
F4	R5 decreased	83	72	75	76