Intelligent Methods And Techniques Researching On Aircraft Maintenance Concept

Aviation industry is a strategic high-tech industry. New Regional Jet Aircraft developed in China is assembling, and large aircraft project start soon, which is im-portant for advancing aviation industry's station and effect. Civil aircraft is a tech-nique-intensive, capital-intensive, high safety and economy, quite complicated large project system, the aircraft maintenance task concept in design phase has very impor-tant effect for the safety, reliability and economic of life. Maintenance task concepts of the civil aircraft include failure effect and reliability analysis of every component, determination maintenance task and optimization interval et al. Presently the main methods of maintenance task concepts include MSG method, single part maintenance mathematic modeling (classical maintenance concept model) and case-based reason-ing et al. Due to the complexity and numerous of civil aircraft maintenance concept, presently the effective method is to relying to the experience data and design of origi-nal aircraft, the practice experience of maintenance personnel. Therefore, using intel-ligent decision making theory and computer technique to research the theory, intelli-gent decision making method and technical of maintenance task concept has impor-tant theory meaning and project foreground for civil aircraft developed in China.Intelligent decision making method and technical of maintenance task concept of civil aircraft are researched. The core of research is to solve the intelligent deci-sion-making maintenance task concept integrating MSG method, CBR and multi-Agent System technic.On the side of maintenance task concept theory, modern maintenance theory such as MSG and RCM, and its'appliance were analyzed deeply, the mathematic ex-pression method of MSG-3 theory was presented, the seven basic steps of mainte-nance task concept was put forward summarized, so did the total decision making process of maintenance policy.On the side of maintenance task concept method, classical maintenance concept model were summarized, the CBR method was applied to maintenance task concept of civil aircraft. The key technical questions in the maintenance task concept deci-sion-making process were researched. At first, the similarity of civil aircraft was re-searched; the definition of similar and the standard of civil aircraft similar were put forward; then, aiming at the limitation of attribute selection basing on classic Rough Set, attribute selection basing on similarity Rough Set method was presented. Sec- ondly, the calculating method of attribute weight was presented, attribute special no-tion was adopted and its'arithmetic also presented. Based on these, the case retrieval arithmetic-first wide choose case using classification filtrate retrieval, then choiceness case using fuzzy near neighbour method was put forward. Thirdly, integration re-searching hybrid CBR and RBR was used based on the engineering facts of civil air-craft maintenance task concept, the case revision method of maintenance task concept was put forward. At last, all the methods were demonstrated.On the side of maintenance task concept technical, maintenance task concept in-telligent Group decision-making system model based on CBR and MAS was re-searched, aimed at the distributing and group decision-making characteristic during maintenance task concept, and the theory of MAS. The case revision model based on RBR and mathematic model was presented.Based on these researches, civil aircraft maintenance program group deci-sion-making Surport system was designed and developed, which is used in the main-tenance program developing of ARJ21 aircraft.