计算机与现代化

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基于混合核函数PSO-SVM的模拟电路故障诊断

  

  1. (河海大学能源与电气学院,江苏 南京 211100)
  • 收稿日期:2016-05-30 出版日期:2017-01-12 发布日期:2017-01-11
  • 作者简介:裴杰才(1989-),男,河南开封人,河海大学能源与电气学院硕士研究生,研究方向:模拟电路故障诊断,人工智能; 李志华(1965-),男,江苏兴化人,副教授,研究方向:模拟电路故障诊断,人工智能,嵌入式工程,新能源。

Analog Circuit Fault Diagnosis Based on PSO-SVM of Hybrid Kernel Function

  1. (College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China)
  • Received:2016-05-30 Online:2017-01-12 Published:2017-01-11

摘要: 针对模拟电路故障诊断中应用传统支持向量机算法存在的问题,提出由粒子群算法优化混合核函数支持向量机模型对模拟电路进行故障诊断的新方法。首先,对待诊断电路进行瞬态分析,记录输出点的电压值,采用小波包技术对输出值进行特征提取;其次,由粒子群算法优化混合核函数支持向量机的核函数权重和结构参数,用训练好的模型进行故障诊断,该方法不仅降低参数选择时的随机性,而且故障诊断的精确度提升了5%左右。在对某高通滤波器模拟电路进行的故障诊断中,验证了该方法的有效性。

关键词: 混合核函数支持向量机, 粒子群算法, 小波包技术, 模拟电路, 故障诊断

Abstract: For the question caused by traditional support vector machine algorithm in analog circuit fault diagnosis, the way using support vector machine algorithm of hybrid kernel function (HSVM) and particle swarm optimization (PSO) is proposed. First, after analyzing the transient circuit under test, and writing down the output voltage, wavelet package is used to extract the output voltage feature; second, we use PSO to optimize the kernel weight and structure parameters of HSVM; last, the trained model is used to diagnose the fault. This method not only reduces the randomness of parameters selection, but also the accuracy of simulation result is improved 5%. The effectiveness is proved during the process of fault diagnosis in high-pass filter analog circuit.

Key words: support vector machine of hybrid kernel function, particle swarm optimization, wavelet package, analog circuit, fault diagnosis

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