电压增量的线性相关性及在电路测试中的应用

为了诊断模拟电路中的软故障和多故障,提出了一种新的基于模拟电路节点电压增量关系方程的分析方法,并证明了各节点电压在随元件参数变化时,电压增量之间关系满足线性相关性。利用线性相关系数作为故障特征,提出新的模拟电路故障字典法。与传统方法字典法相比,新的字典法不仅能够诊断电路的单故障、多故障、硬故障和参数故障,而且能够同时适用于直流诊断和交流诊断。在交流诊断中,节点电压的取值范围从实数域扩展至复数域。

Circuit tests based on the linear relationships between changes in node voltages

Fault diagnosis in analog circuits can be based on changes in node-voltages.The changes in node-voltages are shown to be linearly related to changes in the component parameters.A fault dictionary diagnosis method was then developed using the linear relativity among the increments of node-voltages.Unlike traditional dictionary methods,the new method can diagnose single faults,multiple faults,catastrophic faults,and parametric faults and can be used for both DC and AC tests.For AC tests,the value extension is extended from real space to complex space.