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1、南京航空航天大学硕士学位论文摘要维修大纲是经过管理当局批准的针对某一特定运输类飞机及装机发动机制订的最低初始预定维修/检查要求，是承运人制订其维修方案的基础和框架。研究基于 CBR 的民用飞机维修大纲辅助决策系统，可以为民用飞机维修大纲制订人员提供辅助决策信息，从而提高维修大纲制订的效率和智能化水平。本文首先研究了基于 CBR 的维修任务辅助制订方法,这是本文所要解决的核心问题，它为维修大纲辅助决策系统提供理论指导与核心算法。第二章首先概要的介绍了维修任务类型以及案例推理方法，然后详细论述了维修任务确定方法及其关键技术字符型字段匹配技术，提出采用模糊群决策确定属性权重的方法，最后以ATA32
2、的起落架组件为例实例验证了以上方法，效果良好。之后，本文研究了维修大纲和可靠性案例库的实现方法，首先论述了案例数据的收集整理方法，接着论述了案例库实现的关键技术数据字典的实现和更新方法，最后论述了案例库的设计和组织结构。接着，本文对案例库中数据的质量问题进行了分析，说明了数据清洗的必要性，阐述了数据清洗的原理，提出了两种数据清洗的方法。最后，本文以前面所研究的维修任务的确定方法和数据处理方法为基础，开发了民机维修大纲辅助决策系统。介绍了系统的需求、功能、架构、数据库设计和界面设计方法。关键词：CBR，飞机，维修大纲，决策，案例库，数据I基于 CBR 的民机维修大纲辅助决策系统研究Abstrac
3、tThe maintenance review board report which is authorized by the authority is revised asthe lowest maintenance/inspection standard for a certain kind of transportation aircraftand engines, and is the basement or framework for the operator to develop its mainte-nance project. The research of Civil Air
4、craft maintenance review board report assistancedecision-making system Based on CBR can provide information on assistant decision forthe Civil Aircraft maintenance review board report revise staff to improve the efficiencyand intelligent level of the revising.At first this thesis researches the main
5、tenance task assistance revising method based onCBR，which is the core problem of this thesis, and the theoretical direction and the corearithmetic method of the assistant Decision System for Maintenance Review Board Re-port system come from it. First the chapter two introduces maintenance task type
6、andCBR method in summary. Then introduces the method of maintenance task decision andcharacter-type field matching technology. Then gives a fuzziness method of group deci-sion-making to decide attribution power. At last establish the model of the landing gearmodule in ATA chapter 32, and the results
7、 show good by taking examples for these mod-els.After that, this thesis researches achieve method of maintenance review board reportcasebank and reliability casebank. First introduces the method of collection and ar-rangement of case data. Then introduces the key technology of casebank achievement,t
8、he achievement and update method of data dictionary. At last introduces the design andstructure of casebank.And analysis data quality problem in casebank, and account for the importance of datacleaning, and expound the theorem of data cleaning, and at last establish two methods ofdata cleaning.At la
9、st develop the software of Civil Aircraft maintenance review board report assis-tance decision-making system on the base of researches above. In this part, introducesoftware requirement, function, structure, database design and interface design.Key Words: CBR, Aircraft, MRBR, decision-making, Caseba
10、nk, DataII南京航空航天大学硕士学位论文图目录图 1.1 维修方案制订流程. 2图 1.2 MSG 维修思想发展过程. 4图 2.1 CBR 系统的一般工作过程. 9图 2.2 基于案例推理的多阶段决策分析框架. 10图 2.3 案例表示. 12图 2.4 MRB 报告系统和动力装置维修任务. 17图 2.5 波音报告中维修对象 LANDINGGEAR SHOCK STRUTS 的维修间隔 . 24图 3.1 CRJ700MRB 报告格式. 27图 3.2 表头字段. 27图 3.3 收集部分数据的 EXCLE 表格截图. 28图 3.4 FRACAS 部件非计划更换率数据报告格式. 29图 3.5 案例数据提取流程图. 30图 3.6 CRJ100/200 飞机使用可靠性数据. 30图 3.7 案例库系统的 E-R 模型图. 37图 4.1 数据质量问题的分类. 40图 4.2 数据清洗原理. 40图 4.3 基于模糊隶属度的可靠性数据清洗专家系统原理. 42图 4.4 某一部件可靠性孤立点数据随记录年份变化. 45图 5.1 决策系统的功能结构图.
