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The Design of the Civil Aircraft’s Fault Diagnosing System

Author: ChenZhenKun
Tutor: WengZhengXin；LuBin
School: Shanghai Jiaotong University
Course: Control Engineering
Keywords: Case-Based Reasoning Fault Tree Experience to obtain Character matches
CLC: V267
Type: Master's thesis
Year: 2011
Downloads: 105
Quote: 0
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Abstract


The development of China's civil aviation Aircraft Maintenance and civil aviation fleet size and flight operations compared to the amount showed a greater lag. China's civil aircraft maintenance timing repair parts complete theory based, rather than based on monitoring equipment technical state-based, as appropriate maintenance. Abstract discontinuity of experience, makes the maintenance work still stuck in the traditional work patterns of the original \The same time, the experience can not be stored and can not be shared, so part of the experience as well as data and tend to wither away as the experts retirement or all kinds of reasons, not get the upward spiral of experience within the civil aviation maintenance system, which greatly restricted the General Administration of Civil Aviation of China maintenance of enterprise technology development and progress. In response to these circumstances, the civil aviation maintenance, fault diagnosis, do the following research: 1. Summary of the troubleshooting process for aircraft by civil aviation maintenance enterprise, get expressed in the form of a civil aircraft fault diagnosis process and experience in the field of civil aviation maintenance. And simple classification of aircraft failures faced by the civil aviation maintenance enterprise. Based on a combination of manual and experience-based case-based reasoning, fault tree analysis, supplemented by intelligent fault diagnosis system. The use of case-based reasoning technology can speed up the search and matching speed for the same case, in case of failure can not be a suitable match for the case base, can take advantage of the fault tree analysis, fault diagnosis. 2. Closely related to the case-based reasoning technology with knowledge in different areas have different methods, combined with the field of civil aircraft maintenance, made a detailed analysis of the practical application of case-based reasoning. Main research and analysis of relevant case what form it is stored in the database, the characteristics of the case as well as the classification of the various types of cases as well as database storage structure. On this basis, a brief analysis on case search algorithms and case matching algorithm. Intelligent Fault Diagnosis System algorithm and a matching algorithm based on the comparison of the key characters, the final completion of diagnostic algorithms. . Aircraft fault diagnosis, to guarantee fault diagnosis system as much as possible a comprehensive paper on the basis of case-based reasoning technology, combined with the system based on the fault tree analysis method supplement. Mainly about database technology on the preservation of the fault tree structure discussed on the basis of the database of the fault tree traversal algorithm. 4 on the basis of the above types of algorithms using VB6.0 programming language and SQL Service 2000 database system to build the case base and fault tree database. Complete VB program to read the database through VBA OBV technology by VB \The final completion of the experiment program debugging. Verify the accuracy and reliability of the search algorithm, and matching algorithm.

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CLC: > Aviation, aerospace > Aviation > Aeronautical Manufacturing Technology > Maintenance and repair of aircraft
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