Circle Equation-Based Fault Modeling Method for Linear Analog Circuits

2014 ◽  
Vol 63 (9) ◽  
pp. 2145-2159 ◽  
Author(s):  
Shulin Tian ◽  
ChengLin Yang ◽  
Fang Chen ◽  
Zhen Liu
Keyword(s):  
Analog Circuits ◽  
Fault Modeling ◽  
Modeling Method ◽  
Linear Analog

Phasor Analysis Based Fault Modeling and Fault Diagnosis Methods for Linear Analog Circuits

2014 ◽  
Vol 981 ◽  
pp. 3-10 ◽  
Author(s):  
Yuan Gao ◽  
Cheng Lin Yang ◽  
Shu Lin Tian
Keyword(s):  
Fault Diagnosis ◽  
Data Base ◽  
Analog Circuit ◽  
Feature Selection Method ◽  
Fault Modeling ◽  
Modeling Method ◽  
Support Vector ◽  
Linear Analog ◽  
Circuit Fault Diagnosis ◽  
Phasor Analysis

Soft fault diagnosis and tolerance are two challenging problems in linear analog circuit fault diagnosis. To solve these problems, a phasor analysis based fault modeling method and its theoretical proof are presented at first. Second, to form fault feature data base, the differential voltage phasor ratio (DVPR) is decomposed into real and imaginary parts. Optimal feature selection method and testability analysis method are used to determine the optimal fault feature data base. Statistical experiments prove that the proposed fault modeling method can improve the fault diagnosis robustness. Then, Multi-class support vector machine (SVM) classifiers are used for fault diagnosis. The effectiveness of the proposed approaches is verified by both simulated and experimental results.

Hierarchical fault modeling for linear analog circuits

1996 ◽  
Vol 10 (1-2) ◽  
pp. 89-99 ◽  
Author(s):  
Naveena Nagi ◽  
Jacob A. Abraham
Keyword(s):  
Analog Circuits ◽  
Fault Modeling ◽  
Linear Analog

Methods of Handling the Aliasing and Tolerance Problem for a New Unified Fault Modeling Technique in Analog-Circuit Fault Diagnosis

2014 ◽  
Vol 981 ◽  
pp. 11-16 ◽  
Author(s):  
Yuan Gao ◽  
Cheng Lin Yang ◽  
Shu Lin Tian
Keyword(s):  
Fault Diagnosis ◽  
Analog Circuits ◽  
Analog Circuit ◽  
Fault Modeling ◽  
Modeling Method ◽  
Soft Fault ◽  
The Difference ◽  
Circuit Fault Diagnosis ◽  
Nonlinear Analog Circuits ◽  
Nonlinear Analog

Soft fault diagnosis and tolerance are two challenging problems in analog circuit fault diagnosis. This paper proposes approaches to solve these two problems. First, a complex field modeling method and its theoretical proof are presented. This fault modeling method is applicable to both hard (open or short) and soft (parametric) faults. It is also applicable to either linear or nonlinear analog circuits. Then, the parameter tolerance is taken into consideration. A frequency selection method is proposed to maximize the difference between the faults fault signature. Hence, the aliasing problem arise from tolerance can be mitigated. The effectiveness of the proposed approaches is verified by simulated results.

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