贝叶斯网络在飞机故障诊断与维修优化中的应用

【作者】 陈二强；

【导师】 刘玓；

【作者基本信息】 电子科技大学 ， 计算机应用技术， 2007， 硕士

【摘要】 在高技术条件下的局部战争中，战时维修的关键是时间，要求能快速及时地修复飞机投入战斗，以增加出动次数，这样就对飞机的故障诊断与维修保障的要求越来越高。机务维修人员就要从维修技术和手段上进一步提高，使其能具备快速诊断与维修能力，来降低故障诊断和维修所需要的时间。本文就是在军队“十五”国防预研项目“基于信息融合的装备快速故障诊断技术”的支持下，从维修技术和手段上能进一步得到提高进行研究的。现在，世界各国开展大量的故障诊断的研究工作，通过各种途径来诊断故障。本文利用贝叶斯网络在故障诊断和维修优化中的优势，针对飞机故障诊断中的一些问题，将贝叶斯网络的相关理论研究应用到具体的飞机地面电源车和发动机的故障诊断与维修实践中，提高了对电源设备的维修能力和发动机故障诊断速度，重点是降低维修时间。论文主要完成的工作包括：(1)在分析目前故障诊断与维修面临的主要问题的基础上，引入了基于贝叶斯网络的故障诊断与维修优化方法；通过对故障诊断问题的一般描述、对诊断贝叶斯网络的表达方式和数学描述进行的介绍，对贝叶斯网络故障诊断系统进行了分析和设计。(2)目前贝叶斯网络在故障诊断领域进行的应用，重点是贝叶斯网络诊断模型的建造。本文对飞机地面电源车和发动机进行了贝叶斯网络模型建造。(3)平时是凭机务人员的维修经验来进行工作的，很少把以往发生的故障进行分类和去寻找故障间的关联关系，本文的一个主要创新点就是对平时飞机的故障诊断与维修技术和手段进行改进，对以往发生的故障进行分类总结和找故障间的关联关系，把故障诊断与维修交替进行。把这样故障诊断和维修方法应用到飞机地面电源车和发动机故障诊断的实践中，降低了故障诊断和维修所需要的时间。综上所述，本文开发的贝叶斯网络故障诊断系统，实现了一个将贝叶斯网络从理论研究过渡到飞机故障诊断和维修实践的应用。更多还原

【Abstract】 In high technique war, the key of wartime maintain is time. Itrequests to quickly and in time repair airplanes which will be devotedfight. So the request of the trouble examining and maintaining of airplanebecome more and more high. The research of this thesis is just supportedby the troops "15 national defenses prepare projects-quickly equipmentsbreaksdown examining technique by information fusing",researching aimproved trouble examining and maintaining technique.Now, the international communitys have invested a lot of money inbreakdown examining and a great number of breakdown examining system hadbeen invented. In this thesis, we apply Bayesian network to resolve theairplane breakdown diagnosis and maintaining, improving the maintainingability and examing speed. The works of the thesis mainly include:(1) based on the analysis of the currently main problems of breakdownexamining and maintaining, we research the breakdown examining andmaintaining based on Bayesian network, and analyse and design the Bayesiannetwork breakdown examining system.(2) Currently, the main problem of Bayesian network in breakdownexamining is how to construct the Bayesian network examining model. Thisthesis constructs the power supply car and launched machine Bayesiannetwork model.(3) Usually, the maintaining work is only based on the aircraft crewexperience. It seldom classifies the breakdowns into different classes andfinds the relationship between these breakdowns, ln this thesis, we porposea method to improve the breakdown examining and maintaining technology. Thisapproach classifies these breaddown which former occur and analyses therelationship between those breaddowns, consequently implementingbreaddowns examining and maintaining in turn, reducing the time inbreakdown examining and maintaining.As describing above, In this thesis, we persent a Bayesian networkbreakdown examining system. This system apply the Bayesian network theories to resolve the airplane breakdown examining and maintaining.更多还原