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A Method on Analog Circuit Fault Diagnosis with Tolerance

A Method on Analog Circuit Fault Diagnosis with Tolerance
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摘要 In this paper, it is proved that the direction of the node-voltage difference vector, which is the difference between the node-voltage vector at faulty state and the one at the nominal state, is determined only by the location of the faulty clement in linear analog circuits. Considering that the direction of the node-voltage sensitivity vector is the same as the one of the node-voltage difference vector and also considering that the module of the node-voltage sensitivity vector presents the weight of the parameter of faulty element deviation relative to the voltage difference, fault dictionary is set up based on node-voltage sensitivity vectors. A decision algorithm is proposed concerned with both the location and the parameter difference of the faulty element. Single fault and multi-fault can be diagnosed while the circuit parameters deviate within the tolerance range of 10 %. In this paper, it is proved that the direction of the node-voltage difference vector, which is the difference between the node-voltage vector at faulty state and the one at the nominal state, is determined only by the location of the faulty clement in linear analog circuits. Considering that the direction of the node-voltage sensitivity vector is the same as the one of the node-voltage difference vector and also considering that the module of the node-voltage sensitivity vector presents the weight of the parameter of faulty element deviation relative to the voltage difference, fault dictionary is set up based on node-voltage sensitivity vectors. A decision algorithm is proposed concerned with both the location and the parameter difference of the faulty element. Single fault and multi-fault can be diagnosed while the circuit parameters deviate within the tolerance range of 10 %.
作者 Yan-Jun Li Hou-Jun Wang Ruey-Wen Liu
机构地区 School of Automation Engineering Department of Electrical Engineering
出处 《Journal of Electronic Science and Technology of China》 2009年第4期297-302,共6页 中国电子科技（英文版）
基金 supported by Program for New Century Excellent Talents in University under Grant No.NCET-05-0804
关键词 Analog circuit fault diagnosis fault dictionary node-voltage difference vector sensitivity vector. Analog circuit fault diagnosis, fault dictionary, node-voltage difference vector, sensitivity vector.
分类号 TN710 [电子电信—电路与系统] TP277 [自动化与计算机技术—检测技术与自动化装置]
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Journal of Electronic Science and Technology of China
2009年 第4期

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