Closed-Loop Fault Diagnosis of SDR Using Gap Metric, PCA, and Kalman’s Principle

Table 3

Statistics of simulation results.

Fault type	The total number of simulations	The algorithm proposed in this paper			MWPCA-SPE
		Missing alarm	False alarm	Accuracy	Missing alarm	False alarm	Accuracy
A	400	0	0	100%	6.1%	0	93.9%
B1	400	0	0	100%	100%	0	0
B2	400	0	0	100%	7%	0	93%
C1	400	1.25%	3%	95.8%	8.2%	0	91.8%
C2	400	1.25%	3%	95.8%	8.2%	0	91.8%

Remark: the “Fault Type A” means only one of the pressure sensors was drift faulty, the “Fault Type B1” means both the pressure sensors were drift faulty, and , the “Fault Type B2” means , . The “Fault Type C1” means precision degradation faults, and , , , the “Fault Type C2” means , , .