摘要
为了研究线性模拟电路的性能退化型故障诊断问题,通过构造比较电路,提出了一种基于节点电压灵敏度分析的故障字典建立方法,并结合网络撕裂法实现了多个故障元件的定位和故障参数的辨识。测量可及测试点的电压,计算原电路和比较电路的电压增量之比即可定位故障元件,求解节点电压增量方程可得到故障元件的参数漂移量。仿真结果表明,故障参数辨识的平均误差为7.76%,验证了本方法的有效性。
To diagnosis degraded fault for linear analog circuits, through constructing a comparison circuit, a new fault dictionary based on voltage sensitivity analysis of node is established. Then fault localization and fault parameter identifi- cation are realized for multiple faults case. The fault components can be localized and identified by analyzing the voltages of available test-points. The simulation results demonstrate that the average error of fault parameter identification is 7.76%, and the effectiveness of the proposed approach is verified.
出处
《电子测量与仪器学报》
CSCD
2013年第1期32-37,共6页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(61004074
61134001)资助项目
关键词
模拟电路
故障诊断
灵敏度
网络撕裂法
性能退化
analog circuit
fault diagnosis
sensitivity
decomposition method
degradation
