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- 2017
基于复模型的模拟电路故障诊断
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Abstract:
参数故障诊断和容差问题是模拟电路故障诊断的两个主要难题。该文从故障建模入手，提出一种新的复数域参数故障统一建模方法。模拟电路输出电压的实部和虚部都是故障元件参数的函数，联立实部和虚部函数，并消掉被建模元件参数，得到与参数无关的函数。该函数只由电路结构、故障元件位置和无故障元件的参数确定。因此，以它作为故障模型就与参数无关，能描述任何参数漂移、开路和短路故障。该模型函数是二次函数，除了无故障点之外，不同元件的模型函数会在复平面上相交于第二个点，称为混叠问题。该文采用多频方法来消除此混叠现象。仿真结果验证了方法的有效性。
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