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- 2015
线性模拟电路软故障建模与诊断策略
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Abstract:
针对线性模拟电路软故障诊断问题，提出了一种新的基于解析模型的方法。该方法利用硬故障电压值，构建电路的阻抗-电压方程，以便计算线性模拟电路软故障时系统输出电压，从而形成用于软故障诊断的故障特征向量。该文首先讨论了电路阻抗参数连续变化时，单软故障建模和模拟电路可测性分析的基本结论；其次以多故障中最常见的双故障为例，亦给出了由阻抗-电压方程确立的软故障电压建模；最后形成了相应的故障定位定值策略。在交流信号激励下的例子电路中进行建模与诊断分析，结果表明，提出的软故障建模与诊断策略运行有效，结果准确。
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