Comparison of SOM and PCA-SOM in Fault Diagnosis of Ground-testing Bed

Abstract

In order to compare the fault diagnosis reliability and fault diagnosis efficiency (time consumption property) of PCA-SOM and SOM in liquid propellant rocket engine ground-testing bed, two types of ground-testing bed fault data are used. One is generated by the mechanism model of ground-testing bed. The other is generated according to the expert's experience and the statistical model of fault mode. The comparison results using these two types of fault data both indicate that the fault diagnosis reliability and fault diagnosis efficiency of PCA-SOM are better than SOM.