非线性模拟电路故障诊断的小波领袖多重分形分析方法

针对非线性模拟电路故障的复杂性和非线性,提出一种基于小波领袖多重分形分析和支持向量机的故障诊断方法.首先,采用小波领袖方法对从测试节点采集的信号进行多重分形分析,并将提取的多重分形谱特征构成特征集;然后将特征集输入支持向量机,利用支持向量机的分类功能对电路的模式状态作出决策;最后,视频放大器电路故障诊断实验验证了该方法的有效性.

Nonlinear Analog Circuit Fault Diagnosis using Wavelet Leaders Multifractal Analysis Method

A fault diagnosis method based on wavelet leaders multifractal analysis and support vector machine is proposed, aiming at complex and nonlinear in nonlinear analog circuit faults.Firstly,circuit is excited by artificial multifractal Brownian motion signal.Then,output voltage signals from the test node are obtained,and the multifractal spectrum fault feature vectors,as input samples in support vector machine classifier,are extracted by using wavelet leaders multifractal analysis method.Finally,circuit work m...