测控技术2009，Vol.28Issue(11)：68-72,5.
灵敏度矩阵分析的模拟电路故障诊断方法
Sensitivity Matrix Analysis Approach for Fault Diagnosis of Analog Circuits
摘要
Abstract
After analyzing current fault diagnosis methods based on multi-frequency sensitivity in analog cir-cuits, a new sensitivity matrix analysis approach is presented to select testing frequency. As a coefficient matrix of fault diagnosis equations, singularity of the sensitivity matrix restricts its solutions. On the other hand, sensi-tivity matrix is a function of testing frequency. By simplifying diagnosis equations, the relation between testing frequency and matrix singularity is established to identify the existence of equation' s solutions directly. Experi-mental results show that this approach can be used to select more appropriate testing parameters and frequency bands. Double faults are validated exactly in simulation circuits. The controllability of solving diagnosis equa-tions is increased and the fault diagnosis veracity is improved as well.关键词
故障诊断/模拟电路/灵敏度矩阵/测试频率Key words
fault diagnosis/ analog circuits/ sensitivity matrix/ testing frequency分类
信息技术与安全科学引用本文复制引用
宋国明,雷霖,王厚军,谌强..灵敏度矩阵分析的模拟电路故障诊断方法[J].测控技术,2009,28(11):68-72,5.基金项目
国家自然科学基金资助项目(60673011) （60673011）
国防基础科研项目(A1420061264) （A1420061264）
