Mechanical Failure Analysis of Aircraft Alternator Based on Fault Tree and Case Reasoning

2012 ◽  
Vol 548 ◽  
pp. 516-520
Author(s):  
Yong Bo He ◽  
Sheng Liang Dou
Keyword(s):  
Fault Diagnosis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Central Position ◽  
Case Based Reasoning ◽  
Tree Analysis ◽  
Qualitative And Quantitative ◽  
Ac Power ◽  
Case Reasoning ◽  
Case Based

Aircraft alternator is in the central position of the aircraft AC power system. The existing troubleshooting process is complex and tedious. In this paper, the aircraft alternator fault tree is established, and a fault example of under-voltage condition is analyzed in-depth qualitative and quantitative. According to the importance degree, the order of troubleshooting is obtained, making the fault diagnosis fast and effective. In order to overcome the limitation of the fault tree analysis, case-based reasoning is combined, making the fault diagnosis more comprehensive and accurate.

Study on Reasons of the Falling of the Overhead Line Based on Fault Tree Analysis

2013 ◽  
Vol 325-326 ◽  
pp. 590-593
Author(s):  
Fei Xiang Wei ◽  
Yang Song ◽  
Xiao Xu Ma ◽  
Ying Qian
Keyword(s):  
Power System ◽  
System Reliability ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Power System Reliability ◽  
Overhead Line ◽  
Qualitative And Quantitative Analysis ◽  
Tree Analysis ◽  
Overhead Lines ◽  
Qualitative And Quantitative

The transmission line is an important part of the power system, its reliability will directly affect the reliability of the power system. The reliability of the overhead line plays a crucial role for the power system reliability. This paper analyze the reasons of the falling of the overhead lines, establish a fault tree, and make qualitative and quantitative analysis of the fault tree.

The reliability of general vague fault-tree analysis on weapon systems fault diagnosis

2005 ◽  
Vol 10 (7) ◽  
pp. 531-542 ◽  
Author(s):  
J.-R. Chang ◽  
K.-H. Chang ◽  
S.-H. Liao ◽  
C.-H. Cheng
Keyword(s):  
Fault Diagnosis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Analysis ◽  
Weapon Systems

Fault Diagnosis Analysis of Gear Based on Fuzzy Fault Tree

2011 ◽  
Vol 204-210 ◽  
pp. 1994-1997 ◽  
Author(s):  
Zheng Yao ◽  
Zhao Hua Wang
Keyword(s):  
Fault Diagnosis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Analysis ◽  
Modern Equipment ◽  
Gear Fault ◽  
Diagrammatic Method ◽  
Past Experiences ◽  
Fuzzy Diagnosis ◽  
Fault Information

The complexity of modern equipment is higher than before, thus it cannot meet the need of speedy fault diagnosis to use single diagnosis pattern. According to these troubles, a fault tree was introduced to analyze fault information of gear. Fault tree analysis is a logical and diagrammatic method to evaluate the probability of an accident resulting from sequences and combinations of faults and failure events. In conventional fault tree analysis, probabilities and consequences are treated as exact values. In many engineering applications, however, it is difficult to evaluate the probabilities and consequences from past experiences, so a fuzzy set defined in probability is proposed. The principle of fuzzy diagnosis is taken as basics and symptom sets and faults sets are extracted through fault tree analysis. Experiments show this method is effective for fault diagnosis of gear.

The Failure Cause and Fault Tree Analysis to the Blade of Flue Gas Turbine

2013 ◽  
Vol 378 ◽  
pp. 403-407
Author(s):  
Jian Feng Yang ◽  
Ling Ling Chen ◽  
Wen Bin Liu
Keyword(s):  
Fault Diagnosis ◽  
Gas Turbine ◽  
Failure Rate ◽  
Flue Gas ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Oil Refinery ◽  
Power Equipment ◽  
Efficient Operation ◽  
Tree Analysis

Flue gas turbine is one of the highest failure rate of the power equipment in oil refinery now.It is a key role to achieve saving energy and reducing consumption, the goal ofpollution reduction and the safe, reliable and efficient operation of the flue turbine in refinery. Therefore, it is of great significance to the fault diagnosis of the blade by summarizing the fault reason of the flue gas turbine and using fault tree analysis.

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