离散制造企业生产物流系统建模与仿真

发布时间：2018-07-02 07:38

本文选题：生产物流 + 离散随机　；参考：《西南交通大学》2011年硕士论文

【摘要】：生产物流系统是典型的离散事件动态系统(DEDS),受到很多随机因素影响且难以用数学方法解析。本文在系统分析制造企业物流现状和离散事件系统方法理论的基础上,应用Petri网建模工具和Em-plant生产物流仿真软件,对企业生产物流系统进行了建模仿真。首先引入Petri网理论,建立了X企业物流流程Petri网模型；明确了以马尔科夫状态转移过程为核心思想的逻辑流程以及指标算法,从而对案例进行定性与定量的分析,给出了采购、制造环节的平均延时计算公式。在此基础上,为优化X企业物流业务流程、提高管理水平,提出了相应的建议和改进措施。针对离散系统的不确定性问题,本文对物流系统进行产能估算,利用仿真手段得出了区别传统定值产能的产能波动值；同时研究了系统随机因素如工时波动、设备故障和紧急订单等,提出了一种通过比较工序工时对系统产能干扰影响程度大小来确定瓶颈环节的新方法。在对X企业内物流业务流程Petri网建模和生产物流系统随机仿真的基础上,定义了生产物流系统可靠性的概念,构建了生产物流系统可靠性框架组成,在前人的研究基础上,重点研究了串、并联生产线可靠性和紧急订单的定量评价。同时提出了基于生产线稳健性的优化措施如定期检修、设置安全库存、加强制度规范等。生产物流系统是非常复杂的离散动态系统,需从各个角度进行深入和综合的研究。本文的研究为制造企业优化生产,提高物流管理水平,保证生产物流系统可靠度提供了研究思路。
[Abstract]:Production logistics system is a typical discrete event dynamic system (DEDs), which is influenced by many random factors and difficult to be solved by mathematical method. Based on the analysis of the present situation of manufacturing enterprise logistics and the theory of discrete event system method, this paper uses Petri net modeling tool and Em-plant production logistics simulation software to model and simulate the enterprise production logistics system. Firstly, the Petri net model of X enterprise logistics process is established by introducing Petri net theory, and the logic flow and index algorithm based on Markov state transition process are defined, and the qualitative and quantitative analysis of the case is given. The formula for calculating the average delay of manufacturing link. On this basis, some suggestions and improvement measures are put forward to optimize the logistics business process and improve the management level of X enterprise. Aiming at the uncertain problem of discrete system, this paper estimates the capacity of logistics system, obtains the capacity fluctuation value that distinguishes the traditional fixed capacity by means of simulation, and studies the system stochastic factors such as man-hour fluctuation. In this paper, a new method is proposed to determine the bottleneck by comparing the influence of working hours on the system productivity disturbance, such as equipment failure and emergency orders. On the basis of modeling of logistics business process Petri net and stochastic simulation of production logistics system in X enterprise, the concept of reliability of production logistics system is defined, and the framework of reliability of production logistics system is constructed. The reliability of serial and parallel production lines and the quantitative evaluation of emergency orders are mainly studied. At the same time, the optimization measures based on the robustness of production line are put forward, such as regular maintenance, setting up safety inventory, strengthening system standard and so on. Production logistics system is a very complex discrete dynamic system. The research in this paper provides a research idea for manufacturing enterprises to optimize production, improve the level of logistics management and ensure the reliability of production logistics system.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH186;F253.9

【引证文献】