基于D-S证据理论的无线发射机故障诊断方法  

Fault diagnosis method of wireless transmitter based on D-S evidence theory

作　　者：郭甜甜[1] 慕晓冬[1] 张力[1] 尹宗润[2] 

机构地区：[1]第二炮兵工程学院402室 [2]96550部队

出　　处：《计算机工程与设计》2012年第6期2506-2510,共5页Computer Engineering and Design

摘　　要：针对某无线发射机故障诊断中存在的问题,提出一种基于D-S证据理论的信息融合故障诊断方法。选择电压、功率、频率、幅度等参数作为发射机故障诊断的证据,运用模板匹配法获取基本概率赋值,避免了在小样本情况下应用D-S证据理论时基本概率难以分配的问题,减小了方法的主观性。利用基于可信度的证据合成方法进行融合处理,克服了应用传统D-S证据理论合成冲突证据出现悖论的问题,提高了诊断方法的抗干扰能力。实例验证结果表明该方法切实可行,为无线发射机故障诊断提供了一种新的思路。Aiming at the problem which is being in now fault diagnosis of wireless transmitter,a kind of fault diagnosis method based on D-S evidence theory is given.The parameters of Voltage,power,Frequency,amplitude are selected to be as the evidence of transmitter＇s fault diagnosis.The method of template matching is used in constructing basic probability assignment;it avoided the problem that it is difficult to determine the basic probability assignment during the use of D-S evidence theory,thus reducing subjectivity.the method of evidence compose based on evidence＇s reliability is used in evidence fusion,the problem that occurred absurdities during compounding conflictive evidence is resoloved by tradition D-S evidence theory and the anti-jamming ability of fault diagnosis method is improved.Example result indicates this method is efficacious,it provides a new way of fault diagnosis of UAV data link transmitter.

关 键 词：证据理论 故障诊断 发射机 模板匹配 可信度 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]