基于导纳矩阵分解的非线性电路故障诊断  

Fault Diagnosis in Nonlinear Analog Circuit Based on Incidence Matrix Decomposition

作　　者：雷勇[1] 陈光 谢永乐[1] 朱华贵[2] 杜天军[1] 

机构地区：[1]电子科技大学自动化学院,成都610054 [2]江西财经大学电子学院,南昌330013

出　　处：《仪器仪表学报》2005年第12期1282-1285,共4页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(60372001);四川省青年科技基金(04ZQ026-031)资助项目

摘　　要：提出了一种非线性模拟电路故障诊断新方法。利用矩阵理论的W oodbury公式分解扰动电路的导纳矩阵,推导出非线性元件端电压跨越其工作区间的上折点电压或下折点电压时,扰动元件参数的偏移量和可及测试节点的电压值。利用该方法对非线性模拟电路进行故障诊断,由可及测试节点的电压测试值,诊断出扰动元件参数的偏移量和非线性元件的工作区间。A novel method for fault diagnosis in nonlinear analog circuit is developed. Parameter deviation of perturbed element and voltages of accessible measurement nodes are obtained by using Woodbury formula to decompose circuit＇s incidence matrix while voltages of nonlinear elements reaching upper corner-point voltage or lower corner-point voltage of PWL（piece-wise linear）region. During diagnosing fault in nonlinear analog circuit with the method presented,parameter deviation of perturbed element and operating regions of nonlinear elements can be determined though the measurement voltages of accessible nodes.

关 键 词：非线性模拟电路 故障诊断 Woodbury公式 折点电压 

分 类 号：TN711.1[电子电信—电路与系统]