基于扩展Petri网的飞机总装脉动生产线建模仿真及优化方法研究

发布时间：2018-04-20 19:03

本文选题：飞机总装脉动生产线 + 扩展Petri网(OOHTPN)　；参考：《南京理工大学》2017年硕士论文

【摘要】：随着航空技术的高速发展和市场需求的增加,飞机制造模式正不断转变,缩短制造周期和实现快速响应已成为当务之急,先进的脉动式装配已成为该背景下飞机总装作业模式发展的必然趋势。脉动式总装通过站位划分的方法能够大幅度减少装配时间,其柔性特征亦能够很好适应当前飞机生产小批量多品种的特点,开展与之相关的研究意义重大。本文以飞机总装脉动生产线规划设计为背景,深入研究总装脉动线建模仿真与优化技术,具体工作如下:首先,分析飞机总装脉动线作业模式及内容,在现有装配线平衡优化研究的基础上结合总装脉动线特点,针对性提出脉动线性能和可靠性评价指标。其次,结合复杂离散系统建模方法和实际飞机总装配过程,提出基于面向对象分层赋时 Petri 网(Object-Oriented Hierarchical Timed Petri Nets,OOHTPN)的扩展 Petri 网的总装建模方法,论述模型特性分析方法和建模步骤,并以部分总装指令为实例进行验证。再次,在对实际站位划分环境和作业时间分析定义的基础上,提出以装配周期最短、站位利用率最高等为目标求解最小站位数的数学模型,研究基于OOHTPN总装模型的启发式运算方法并以实例验证模型的合理性和求解方法的正确性。由于实际总装线受到诸多不确定因素和随机事件的影响,提出基于优先规则的动态调度策略和优化算法来维护脉动线的正常作业。最后,开展基于DELMIA V6软件平台的总装脉动线模型在逻辑层和资源层的仿真与优化技术研究,定义OOHTPN模型至DELMIA V6仿真模型的映射规则,制定仿真策略并对结果进行分析,对站位划分研究进行验证和改进。为便于总装线模型仿真,对DELMIA V6进行二次开发,增加产品层次快速划分功能用以实现仿真模型的快速建立,增加仿真策略用以实现和实际装配的关联与监控,增加仿真结果输出功能用以指导实际装配作业。
[Abstract]:With the rapid development of aviation technology and the increase of market demand, aircraft manufacturing mode is changing constantly. It is urgent to shorten manufacturing cycle and realize rapid response. Advanced pulsating assembly has become an inevitable trend in the development of aircraft assembly operation mode under this background. The pulsating assembly can greatly reduce the assembly time by the method of station division, and its flexible features can well adapt to the characteristics of the aircraft production in small quantities and many varieties, so it is of great significance to carry out the research related to it. Based on the planning and design of the aircraft assembly pulsating production line, the modeling, simulation and optimization techniques of the assembly pulsation line are studied in this paper. The specific work is as follows: firstly, the operation mode and content of the aircraft assembly pulsation line are analyzed. On the basis of the research on the balance optimization of assembly line, the performance and reliability evaluation index of pulsating line are put forward in combination with the characteristics of assembly pulsation line. Secondly, combined with the modeling method of complex discrete system and the total assembly process of actual aircraft, the method of assembly modeling of extended Petri net based on Object-Oriented Hierarchical Timed Petri NetOHTPN (Object-Oriented Hierarchical Timed Petri net) is proposed, and the analysis method of model characteristics and modeling steps are discussed. And take partial assembly instruction as an example to carry on the verification. Thirdly, on the basis of analyzing and defining the environment and working time of actual stations, a mathematical model is proposed to solve the minimum number of stations with the shortest assembly cycle and the highest utilization rate of stations. The heuristic operation method based on OOHTPN assembly model is studied, and the rationality of the model and the correctness of the solution method are verified by an example. Because the actual assembly line is affected by many uncertain factors and random events, a dynamic scheduling strategy and an optimization algorithm based on priority rules are proposed to maintain the normal operation of pulsating lines. Finally, the simulation and optimization technology of the assembly pulsation line model based on DELMIA V6 software platform in logic layer and resource layer is studied. The mapping rules from OOHTPN model to DELMIA V6 simulation model are defined, and the simulation strategy is worked out and the results are analyzed. Verify and improve the research of station location division. In order to facilitate the simulation of assembly line model, the secondary development of DELMIA V6 is carried out, and the function of product level fast partition is added to realize the fast establishment of simulation model, and the simulation strategy is added to realize the connection and monitoring with the actual assembly. The output function of simulation results is added to guide the actual assembly operation.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：V262.4;TP301.1

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