A Novel Fault Diagnosis Approach in Analog Circuits
SUN Xianming
FAN Xiaoguang
ZHUO Zhenfu
HUANG Lei
CHEN Shaohua
Abstract：In order to improve the accuracy of fault diagnosis in analog circuits,aimed at the instability structure and error transferring of the existing directed acyclic graph support vector machine (DAG-SVM),a novel approach based on fault distinguish degree to construct DAG-SVM is proposed.According to the fault information acquired from all of the testable points,this paper defines the concept of fault dis-tinguish degree,and takes this as a basis to optimize the topology of the DAG-SVM to eliminate the inher-ent instability of DAG-SVM structure.For this reason,there is a stable and quite good accuracy of diagno-sis.The experimental results show that this method improves obviously diagnosis accuracy compared with"1 vs 1",SVM,and traditional DAG-SVM,and simultaneously the method can be used for reference in an-alog circuit fault diagnosis.
Keywords：analog circuitfault diagnosismulti-class classificationdirected acyclic graph-support vector machinefault distinguish degree
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 64-69 )