一种模拟电路参数型故障诊断新方法

发布时间：2018-06-11 20:11

本文选题：模拟电路 + 故障诊断　；参考：《电子科技大学学报》2017年02期

【摘要】：模拟电路参数型故障诊断一直是电路与系统无法回避的难题。该文基于被测电路主输出电压信号的时间序列值,建立了一种基于本征值和相位差的模拟电路参数型故障诊断模型。该模型利用故障电路的电压输出时间序列值获取电路的故障相位偏移信息,同时,该模型把电压时间序列变换成一个方阵,并求取该方阵的最大本征值。将故障相位偏移信息和故障最大本征值与通过前期仿真获得的每种器件相对应的无故障最大相位偏移和无故障最大本征值的变化趋势进行比较,实现故障定位和参数辨识。实测实验结果表明:该方法具有定位准确、计算效率高,所需测试点少、参数辨识精度高,易于工程实施等优点。
[Abstract]:Parametric fault diagnosis of analog circuits has always been a difficult problem for circuits and systems. Based on the time series value of the main output voltage signal of the circuit under test, a parametric fault diagnosis model of analog circuit based on eigenvalue and phase difference is established in this paper. The model uses the voltage output time series of the fault circuit to obtain the fault phase offset information of the circuit. At the same time, the model transforms the voltage time series into a square matrix, and obtains the maximum eigenvalue of the matrix. The fault phase offset information and fault maximum eigenvalue are compared with the variation trend of the fault free maximum phase offset and fault free maximum eigenvalue corresponding to each device obtained by previous simulation. The fault location and parameter identification are realized. The experimental results show that this method has the advantages of accurate location, high calculation efficiency, few test points, high precision of parameter identification, and easy to be implemented in engineering.
【作者单位】：电子科技大学自动化工程学院;宜宾学院物理与电子工程学院;
【基金】：国家重点基础研究发展计划(2014CB744206) 国家自然科学基金(61371049) 四川省教育厅项目(09ZC081)
【分类号】：TN710

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