CAJ | 학술논문

针对模拟电路中的硬故障,提出了一种基于马氏距离统计学原理的快速定位方法。利用Pspice电路仿真软件,对ITC＇97基准电路集中的连续状态可变滤波器电路进行电路建模及故障注入仿真,用Pspice与Matlab软件的数据接口技术,将无故障及各故障状态的仿真数据导入Matlab中,进而在Matlab环境中进行小波变换处理及马氏距离的计算,并以马氏距离作为定位故障元件的依据。经检验,这种故障定位方法对模拟电路硬故障具有快速定位的能力,而且测点少、在线计算量小等优点。
침대모의전로중적경고장,제출료일충기우마씨거리통계학원리적쾌속정위방법。이용Pspice전로방진연건,대ITC＇97기준전로집중적련속상태가변려파기전로진행전로건모급고장주입방진,용Pspice여Matlab연건적수거접구기술,장무고장급각고장상태적방진수거도입Matlab중,진이재Matlab배경중진행소파변환처리급마씨거리적계산,병이마씨거리작위정위고장원건적의거。경검험,저충고장정위방법대모의전로경고장구유쾌속정위적능력,이차측점소、재선계산량소등우점。
To solve the catastrophic fault of analog circuits,this paper proposes a fast location method based on Mahalanobis distance.Firstly,a simulation of circuit and fault modeling is made in PSPICE for the Continuous-Time Sate-Variable Filter in the ITC＇97 Analog and Mixed-Signal Benchmark Circuits.Secondly,simulation data of both fault-free and faulty circuit is imported into Matlab using PSPICE and Matlab software data interface technology.Then,wavelet transform and Mahalanobis distance calculation of the simulation data is done in Matlab.Finally,the faulty component would be detected based on the Mahalanobis distances of both fault-free and faulty circuits.Tests show that this method with quick positioning ability has the advantage of simplicity and small online computational amount.