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Reliability analysis of aircraft power supply system based on fuzzy FMECA method

Author: ChenYuan
Tutor: DuLi
School: University of Electronic Science and Technology
Course: Mechanical Design and Theory
Keywords: electric power supply system FMECA fuzzy comprehensive evaluation 3F workflow 3F analysis software
CLC: V242.2
Type: Master's thesis
Year: 2011
Downloads: 84
Quote: 0
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Abstract


The electric power supply system is an important part of an aircraft. It has an important function on completing the mission. Until now, reliability research on electric power supply system is scarce. Electric power supply system has been linked with other systems on an aircraft, such as flight control system, dynamic system, navigation system and so on. At the same time, electric power supply system always has a complicated network structure and with plenty of components.When flying, it may cause a catastrophe when only one is broken. So it is necessary to make reliability analysis on electric power supply system.This paper analyzes an aircraft electric power supply system as an example. It constructed the risk evaluation model of an electric power supply system. Based on FMEA analysis of the electric power supply system, it evaluated the risk of the products on an aircraft using fuzzy comprehensive evaluation method, and then made evaluation of the whole electric power supply system. We use analytic hierarchy process to establish the weight of factors, and use RPN method to establish the risk level. At the same time, we researched the FMECA implement process, the differences between system FMECA and unit FMECA and so on. Also, this paper presented some advises on improving 3F system and system FMECA analysis process and so on.In the end, we presented a method of 3F analysis software design by the example of the aircraft 3F system software. It concludeed the data structure, module structure and detail design. Though fuzzy FMECA analysis on electric power supply system,we got the evaluation result on the system,the electric power supply system on this aircraft is reliable.

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CLC: > Aviation, aerospace > Aviation > Aircraft instrumentation,avionics, flight control and navigation > Electrical equipment > Power system
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