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

Table 2

Residuals and OAs, with the number of features increasing from 1 to 10, for the constant-voltage case. Training set including a mixture of error magnitudes.

	Residual subset	Overall accuracy (OA)
		Test-set max. error			OAavg
		2%	4%	6%
1	9	0.41	0.42	0.42	0.42
2	1, 2	0.90	0.88	0.82	0.87
3	2, 3, 8	0.95	0.89	0.80	0.88
4	2, 3, 4, 8	0.97	0.92	0.84	0.91
5	1, 2, 3, 4, 8	0.97	0.90	0.83	0.90
6	1, 2, 3, 4, 8, 9	0.98	0.89	0.80	0.89
7	1, 2, 3, 4, 7, 8, 9	0.98	0.88	0.79	0.89
8	1, 2, 3, 4, 5, 7, 8, 9	0.98	0.92	0.82	0.91
9	1, 2, 3, 4, 5, 6, 7, 8, 9	0.98	0.92	0.86	0.92
10	1, 2, 3, 4, 5, 6, 7, 8, 9, 10	0.98	0.92	0.86	0.92