Joint Feature and Model Selection for SVM Fault Diagnosis in Solid Oxide Fuel Cell Systems

Table 5

PA_avg when two subsets of easy-to-measure residuals are adopted. The training set included a mixture of error magnitudes. Class number meaning: 0: nonfaulty system; 1: SOFC stack degradation; 2: air leakage; 3: fuel leakage; 4: reformer degradation.

Control str.	Residual subset	Average producer accuracy (PAavg)
		Class number
		0	1	2	3	4
Constant-voltage	2, 3, 4	0.87	0.68	0.88	0.88	0.49
	1, 2, 3, 4	0.89	0.89	0.89	0.92	0.85
Constant-current	2, 3, 4	0.97	0.45	0.83	0.89	0.97
	1, 2, 3, 4	0.85	0.57	0.90	0.86	0.99