基于改进符号有向图模型的发动机引气系统多故障诊断方法

刘君强; 王小磊; 张马兰; 谢吉伟; 左洪福

doi:10.13224/j.cnki.jasp.2015.02.020

基于改进符号有向图模型的发动机引气系统多故障诊断方法

doi: 10.13224/j.cnki.jasp.2015.02.020

南京航空航天大学民航学院, 南京 211106

基金项目:

中国博士后面上基金(2012M521081)

中国博士后基金特别资助(2013T60537)

国家自然科学基金重点项目(61232002)

国家自然科学基金委与中国民用航空总局联合项目(60939003)

详细信息

作者简介:
刘君强(1978-),男,山东威海人,讲师,博士,主要从事航空发动机故障诊断研究.

中图分类号: V245.3;TP277
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- 文章访问数: 944
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- 被引次数: 0
出版历程
- 收稿日期: 2014-08-25
- 刊出日期: 2015-02-28

Multiple faults diagnosis method of engine bleed system based on improved signed directed graph

College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

摘要

摘要: 为了在符号有向图(SDG)模型中进行多故障诊断,提出了基于改进符号有向图(ISDG)模型的多故障诊断方法.ISDG模型满足了不完全信息条件下的多故障组合诊断的需求.通过交互式方法构建不完全信息条件下的诊断过程,利用最大增益费用比确定了最优的测试序列,实现了在多故障诊断过程中效率的提高和成本的降低.最后用交互式算法诊断某民用发动机引气系统多故障,ISDG模型能够诊断多故障,说明诊断多故障可以提高诊断效率;考虑组合逻辑后,最小费用比最大费用减小了7.25,增益费用比增大了32.2%,说明考虑组合逻辑可以减少32.2%的费用.
- 多故障诊断 /
- 符号有向图 /
- 组合逻辑 /
- 引气系统 /
- 相容通路 /
- 诊断树
Abstract: To diagnose multiple faults in signed directed graph (SDG) model, an improved signed directed graph (ISDG) multiple fault diagnosis model was proposed. The proposed ISDG model can meet the requirements of multiple faults combinations diagnosis in incomplete information conditions. The diagnosis process in incomplete information conditions can be established by interactive method. The optimum test sequence was determined by the maximal gain-cost ratio. This model improved the efficiency and reduced the cost in the multiple fault diagnosis process. Finally, the multiple faults of an civil engine bleed system were diagnosed with the interactive algorithm. The multiple faults can be diagnosed by ISDG model, so the diagnostic efficiency was improved by diagnosing multiple faults. After using combinational logic, the minimum cost is reduced by 7.25 than the maximum cost, and gain-cost ratio increases by 32.2%. These results explain that the cost can be reduced by 32.2% by using combinational logic.
- multiple faults diagnosis /
- signed directed graph /
- combinatorial logic /
- bleed system /
- consistent branch /
- diagnostic tree

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参考文献(19)

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