考虑人机干涉问题的串行生产线建模与性能分析

发布时间：2018-02-04 15:05

本文关键词： 生产线建模人机干涉闭环排队网络马尔科夫过程性能分析　出处：《吉林大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着企业间市场竞争的加剧,成本与效率这两个指标在企业中扮演的角色也越发重要。对于制造企业来说,其生产线的性能水平直接决定着企业的竞争力水平。因此,针对生产线性能相关的课题进行研究很有必要。目前已有不少文献对生产线的建模与性能分析问题展开了研究,但它们大多只考虑了生产线中的机器和缓存区,忽略了人的因素。伴随着一人操作多台机器的情况越来越普遍的应用于生产线中,考虑人机干涉问题对生产线进行建模和性能分析具有重要的理论与实际意义。本文以串行生产线建模与性能分析为主线,基于闭环排队网络和马尔科夫过程针对工作站中含有人机干涉问题的串行生产线进行建模与性能分析。论文研究过程分为三步,分别为串行生产线结构化建模、串行两机生产线建模与性能分析和串行多机生产线建模与性能分析。首先,本文基于闭环排队网络对含有人机干涉问题的工作站进行建模,求得其稳态解及该工作站处于各状态的概率。结合单机生产线模型中机器各状态概率的求解结果,求得与含有人机干涉问题工作站等效的虚拟机器参数,完成了生产线结构化建模,将工作站中含有人机干涉问题的串行生产线转化为简单的串行生产线。其次,本文基于马尔科夫过程对串行两机生产线进行建模,并运用矩阵几何解方法对其稳态概率进行求解。之后建立了串行两机生产线性能指标的衡量公式,分析了影响生产线性能的相关因素。然后分别以各影响因素为自变量研究了这些因素对串行两机生产线性能的影响,并提出了相应的控制建议。最后,本文基于合并法对串行多机生产线进行了建模分析,得到了向后合并、向前合并过程中各虚拟机器的参数,建立了串行多机生产线性能指标的衡量公式,并总结给出了串行多机生产线性能分析的整个计算体系。为了验证模型的实用性,以F公司车桥车间左壳体生产线为研究对象做了案例研究,结果表明:1)本文建立的性能指标计算方法收敛性好,具有很好的操作性和实用性;2)左壳体生产线的实际吞吐率低于其瓶颈吞吐率,缓存区位置越靠后其实际占用率越低。本文针对含有人机干涉的串行多机生产线所建立的性能计算体系可为生产线的设计和改进提供理论支撑,对生产线的设计和管制人员具有一定的指导意义。
[Abstract]:With the aggravation of market competition between enterprises, the two indicators of cost and efficiency play an increasingly important role in the enterprise. The performance level of the production line directly determines the competitiveness of the enterprise. It is necessary to study the problem of production line performance. At present, many literatures have studied the modeling and performance analysis of production line, but most of them only consider the machine and buffer area in the production line. The human factor is ignored. With one person operating more and more machines, it is more and more widely used in the production line. Considering the problem of man-machine interference, it is of great theoretical and practical significance to model and analyze the performance of the production line. In this paper, the serial production line modeling and performance analysis is the main line. Based on closed loop queuing network and Markov process, the modeling and performance analysis of serial production line with man-machine interference in workstation is carried out. The research process is divided into three steps, which are structured modeling of serial production line. Serial two-machine production line modeling and performance analysis and serial multi-machine production line modeling and performance analysis. First, this paper based on the closed-loop queuing network to model the workstation with man-machine interference problem. The steady-state solution and the probability of each state of the workstation are obtained, and the virtual machine parameters equivalent to the workstation with man-machine interference problem are obtained by combining the results of each state probability of the machine in the single-machine production line model. The structural modeling of production line is completed and the serial production line with man-machine interference problem in workstation is transformed into a simple serial production line. Secondly, the serial two-machine production line is modeled based on Markov process. The steady-state probability is solved by using the matrix geometric solution method, and then the formula for measuring the performance index of the serial two-machine production line is established. The related factors that affect the performance of the production line are analyzed. Then the influence of these factors on the performance of the serial two-machine production line is studied with each factor as the independent variable, and the corresponding control suggestions are put forward. In this paper, the serial multi-machine production line is modeled and analyzed based on the merging method, and the parameters of each virtual machine in the process of backward merging and forward merging are obtained, and the evaluation formula of the performance index of the serial multi-machine production line is established. In order to verify the practicability of the model, a case study on the left shell production line of the vehicle and bridge workshop of F Company is done in order to verify the practicability of the model. The results show that the proposed method has good convergence, good maneuverability and practicability. 2) the actual throughput of the left shell production line is lower than its bottleneck throughput. The lower the location of buffer area is, the lower the actual occupancy rate is. The performance calculation system of serial multi-machine production line with man-machine interference can provide theoretical support for the design and improvement of production line. For the production line design and control staff have a certain guiding significance.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：F275;F273;O211.62

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