摘要
D-S证据理论在民用飞机电源系统的故障诊断中有着广泛的应用,但是处理高度冲突的数据依然存在困难。为了解决证据理论工程应用中的这一难题,提出了一种基于改进证据理论的民机电源系统故障诊断方法。新方法引入民机电源系统故障的历史数据,定义了修正因子的概念,并且用经典数据案例验证了这一诊断方法。数据案例验证的结果表明,新方法在数据融合的过程中更快更准确的识别出目标,提高了故障诊断结果的可靠性和精确性,而且增强了故障诊断系统的性能,是证据理论在工程应用中的一个突破。
Dempster-shafer evidence theory has been used widely in civil aircraft electrical system fault diagnosis.However the combination of highly conflicting remains a difficult problem in practical applications.In order to solve the problem,a new method is proposed in this paper.The proposed method in this paper introduces the historical data as modifying factor,modify the evidences,and verify the diagnosis method by classical data case.Data case validation results show that the new method can identify the target more quickly and accurately,and improve the reliability and accuracy of fault diagnosis results.This new method enhance the performance of the system and is a breakthrough in the engineering application of D-S evidence theory.
出处
《国外电子测量技术》
2017年第8期5-10,共6页
Foreign Electronic Measurement Technology
关键词
证据理论
故障诊断
民机电源系统
历史数据
修正因子
evidence theory
fault diagnosis
civil aircraft electrical power system
historical data
modifying factor
