基于NOFRFs的中放检波电路系统故障定位方法  

A NOFRF-Based Method for Fault Location of Cascading Analog Circuit Systems

作　　者：樊天锁 乔术旗 杨东东 胡中泽 

机构地区：[1]第二炮兵工程大学101室,陕西西安710025

出　　处：《机电工程技术》2012年第8期151-155,共5页Mechanical & Electrical Engineering Technology

摘　　要：非线性电路系统在故障前后其非线性传递特性往往会发生明显的改变,通过比较系统正常状态下的频域特征与当前工作状态下的频域特征就可以判断系统是否处于故障状态。系统的非线性传递特性在频域的表现是广义频率响应方程GFRFs及非线性输出频率响应方程NOFRFs。基于NOFRFs理论对多级级联模拟电路中的非线性故障进行定位的方法作了具体介绍。并通过使用不同的激励信号激励系统,说明了激励信号的选择对故障诊断的影响。When a nonlinear circuit had some faults,its nonlinear transfer characteristics would obviously change,therefore,systems health can be determined through comparing the nonlinear characteristics between the current work state and the normal state of the system.The transfer characteristic of a nonlinear system in frequency domain is referred to as Generalized Frequency Response Functions（GFRFs） or Nonlinear Output Frequency Response Functions（NOFRFs）.A NOFRF-based method for fault diagnosis of cascading analog circuit systems is introduced in this article.Different stimuli were used to show the effects of the choice of stimuli to fault diagnosis.

关 键 词：非线性 故障定位 NOFRFs 中频放大电路 

分 类 号：TM132[电气工程—电工理论与新技术] TP306.3[自动化与计算机技术—计算机系统结构]