State Estimation and Fault Diagnosis for Nonlinear Analog Circuits

摘要：

this paper demonstrates a new approach of fault diagnosis for the nonlinear analog circuits, which is based on the computation of maximum Lyapunov exponent of chaotic time series. We use this method to estimate the operating states of strong nonlinear analog circuits, and make a discussion on selecting a proper pair of embedding dimension and time delay for phase space reconstruction. This new fault diagnosis method is validated by an instance: The output signal of a harmonic oscillator with variable periods in radar is taken as the testing object, the surrogate method is used to generate the fault data, and the maximum Lyapunov exponent is calculated by means of the small data-set approach. The simulation testing results indicate that this method can efficiently find out the abnormal changes in nonlinear analog circuits.

作者: Ma Hong-guang Li Geng

作者单位: Department (1) Xi’an Research Institute of High Technology Xian, P.R. China School of Electronic Engineering and Communication Xian Jiaotong University

会议类型: 国际会议

会议名称: 2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)

会议地点: 广西桂林

会议语种:英文

页码: 266-270

在线出版日期: 2006-06-25（万方平台首次上网日期，不代表论文的发表时间）