基于相干检测解轨迹跟踪的非线性电路故障诊断  

Fault diagnosis for nonlinear dynamic circuit based on trajectory tracing of coherent test

作　　者：徐晨曦[1,2] 陈光[1] 李桂祥[2] 

机构地区：[1]电子科技大学自动化工程学院,成都610054 [2]空军雷达学院预警探测装备系,武汉430019

出　　处：《仪器仪表学报》2008年第10期2090-2095,共6页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(60372001)资助项目

摘　　要：通过调幅激励下非线性电路响应随调幅信号变化关系(解轨迹)的跟踪,提出一种基于相干检测解轨迹跟踪的非线性电路故障诊断方法。利用解轨迹与Volterra响应间的故障信息等价性,将非线性故障诊断问题变换到线性子电路上分析;由解轨迹与凋幅信号间的相干性,通过相位驻留法提取动态电路的静态特征,并建立统一的故障诊断方程。最后通过实例仿真说明该方法的有效性。A fault diagnosis approach for nonlinear dynamic circuit is presented based on coherent test to trace the trajectories produced by amplitude modulation （AM） stimulation. Using the equivalence relationship of fault information between the trajectories and Voherra responses, the diagnosis of nonlinear circuit can be transformed into that of a series of sub-linear circuits. According to the relativity between the modulated signal and trajectories, tbe phase slayed approach is used to extract the static fauh characteristics, and then the unified equation of fault diagnosis is created. Finally, an example is used to illuminate the effectiveness of the proposed method.

关 键 词：非线性动态电路 故障诊断 相干检测 解轨迹跟踪 VOLTERRA级数 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程] TN713[自动化与计算机技术—控制科学与工程]