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Computer Engineering ›› 2008, Vol. 34 ›› Issue (7): 254-256. doi: 10.3969/j.issn.1000-3428.2008.07.090

• Engineer Application Technology and Realization • Previous Articles     Next Articles

Reliability Analysis of Avionic System Based on Vague Fault Tree

ZHANG Chao1,2, MA Cun-bao1,2, SONG Dong1, XU Jia-dong2   

  1. (1. School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072; 2. School of Electrical and Information, Northwestern Polytechnical University, Xi’an 710072)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-04-05 Published:2008-04-05

基于Vague故障树的航空电子系统可靠性分析

张 超1,2,马存宝1,2,宋 东1,许家栋2   

  1. (1. 西北工业大学航空学院,西安 710072;2. 西北工业大学电子信息学院,西安 710072)

Abstract: Because most avionic equipments have abnormal states and its failure behaviors are always characterized in uncertainty, it is very difficult to analyze its reliability by Fault Tree Analysis(FTA) model which is based on probability theory. To solve this problem, the failure behaviors of bottom events are represented by triangle Vague sets, and the AND/OR fuzzy operators are built based on arithmetic operations of triangle Vague sets, and sequentially the Vague Fault Tree Analysis(VFTA) model is proposed. Three FTA models are adopted respectively to analyze the reliability of a DC system, and the comparisons show that the proposed VFTA model is more flexible and more effective than the other fuzzy FTA models.

Key words: avionic system, abnormal state, triangle Vague sets, Vague fault tree

摘要: 由于航空电子系统工作时存在失常态,且其失效行为具有不确定性,因此基于概率论的故障树分析(FTA)模型不适用于分析其可靠性。该文引入Vague集描述底事件的失效行为,并构造了基于三角形Vague集算术运算的与/或门模糊算子,提出一种Vague故障树分析(VFTA)模型。对某直流系统进行可靠性分析表明,VFTA模型比其它模糊FTA模型更灵活、更有效。

关键词: 航空电子系统, 失常态, 三角形Vague集, Vague故障树

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