【作者】 张玮；

【导师】 李艳军；

【作者基本信息】 南京航空航天大学 ， 工程硕士（专业学位）， 2020， 硕士

【摘要】 民机制造是一项极其复杂的系统工程,民机装配现场是极其复杂的生产现场,民机装配现场管控是民机装配过程中的重点与难点,其效率和质量影响着最终产品的交付。现代数字化制造技术带动了民机装配行业技术上的进步,大大提高了民机装配企业的生产效率,降低了企业的生产成本,而如何制定科学有效的装配现场生产计划与动态调度方案,在提高民机装配的生产效率和生产水平中起着至关重要的作用。本文以先进的管理理念为基础,结合作者在某民机装配生产企业生产现场管控系统研发项目中收获的知识和经验,针对民机装配的复杂性大、周期长、不确定性高、约束条件多、调度目标多、离散程度大等问题,主要做了以下工作:(1)首先对民机数字化装配现场管控的具体内容及特点进行研究。民机装配生产线是民机装配现场管控中的主要内容,首先对传统的民机装配生产线以及现代民机数字化装配生产线的具体内容和特点进行了研究,在此基础上,研究了民机装配现场管控的内容、特点、业务流程及需求,然后以此为基础,分析了在制定民机装配生产计划时需要注意的问题,为后文研究生产计划与动态调度优化打下基础;(2)其次,对民机数字化装配现场生产计划优化进行了研究。结合企业已有的生产现场管控系统采集影响装配生产效率的关键因素信息,将多个目标进行归一化处理,构建多目标民机装配生产调度模型;针对民机数字化装配现场管控的实际情况对遗传算法进行改进,并在其中加入退火过程,设计出改进的遗传算法与模拟退火算法的混合算法,对多目标民机装配生产调度模型进行优化计算,并以某民机装配企业为例,进行仿真与求解;(3)进行民机数字化装配现场动态调度优化研究。在进行了生产计划优化研究的基础上,构建动态调度模型,结合作者的项目经验,针对某民机装配企业实际需要,利用基于优先级的滚动窗格调度策略,与基于混合驱动机制的动态调度方法,主动监测已发生异常随机事件,进行动态调度模型的求解,最后选取机器故障这一异常随机事件进行案例仿真与求解。更多还原

【Abstract】 Civil aircraft manufacturing is a very complex system engineering.The site of civil aircraft assembly is a very production site.Site management and controlling of civil aircraft assembly is main and difficult points in the course of civil aircraft manufacturing,whose efficiency and quality affect the delivery of final products.Modern digital manufacturing technology has driven the technological progress of civil aircraft assembly industry,greatly improved the production efficiency of civil aircraft assembly enterprises,and reduced the production cost of enterprises.How to make a scientific and effective production planning and dynamic scheduling scheme civil aircraft assembly site plays an important role in improving the production efficiency and production level of civil aircraft assembly.Based on advanced management concept,combined with knowledge and experience gained by the author in research of management and control system of production site of a civil aircraft assembly enterprise,pointed at the problems of complexity,long period,high uncertainty,many constraints,many scheduling objectives,large degree of discreteness during civil aircraft assembly,the following work has been done:(1)First of all,the specific content and characteristics of digital assembly site management and control of civil aircraft are studied.Civil aircraft assembly line is the main content of civil aircraft assembly site management and control.Firstly,the specific content and characteristics of the traditional civil aircraft assembly line and the modern civil aircraft digital assembly line are studied.On the basis of it,the content,characteristics,business process and requirements of civil aircraft assembly site management and control are studied.Then the problems that should be paid attention to when making the assembly production plan of civil aircraft are analyzed,which lays a foundation for the research of production planning and dynamic scheduling optimization.(2)Secondly,the optimization of production plan for digital assembly of civil aircraft is studied.Combined with the existing production site management and control system to collect the information of the key factors affecting the assembly production efficiency,the multi-objective production scheduling model of civil aircraft assembly is constructed by normalizing the multi-objective.According to the actual situation of digital assembly field management and control of civil aircraft,the genetic algorithm is improved,and the annealing process is added to it.The hybrid algorithm of improved genetic algorithm and simulated annealing algorithm is designed to optimize the production scheduling model of multi-objective civil aircraft assembly,and a civil aircraft assembly enterprise is taken as an example for simulation and solution.(3)The dynamic scheduling optimization of digital assembly site of civil aircraft is studied.Based on the study of production planning optimization,a dynamic scheduling model is constructed.Combined with the project experience of the author,according to the actual needs of a civil aircraft assembly enterprise,using the priority based rolling pane scheduling strategy and the hybrid drive mechanism based dynamic scheduling method,the main monitoring has occurred abnormal random events,and the dynamic scheduling model is solved.Finally,the abnormal random event of machine failure is taken as an example for simulation and solution.更多还原