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Analysis of bucket brigade protocols in manufacturing environments with discrete stations.

机译:在具有离散工作站的制造环境中分析铲斗旅协议。

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摘要

The dynamics of a bucket brigade line with discrete stations and an analysis of themes throughput of such dynamics are studied. Most of the previous work in bucket brigades assumes that handovers can occur at any point throughout the production line. This research restricts handovers to occur at station endpoints which corresponds to some real-life settings. The adoption of discrete bucket brigades leads to a decrease of throughput in comparison to handovers that occur at any point of the line. Since handovers can only occur at a finite number of points, the dynamics of the production line can be obtained through an adjacency matrix and/or a connectivity graph.;For more than two stations, the reset of the bucket brigade when the last worker has finished his product can be performed in several different ways. Fundamentally there are two distinct handover protocols: synchronous, where workers wait until all of them simultaneously start a new production step; and, asynchronous handover protocols where handovers are staggered. A specific natural asynchronous handover protocol is defined and the dynamics and throughput of a bucket brigade with discrete stations is studied. It is shown that this asynchronous protocol reduces waiting time and hence increases the throughput of the production line in most cases. The dynamics of the line will be studied by generating a finite connectivity graph. With that graph the globally self-balancing bucket brigades can be identified and locally stable periodic self-organizing behavior and its basin of attraction can be determined.;An extension of a bucket brigade system is also proposed to optimize throughput based on the handover point. In this modified policy, called Clever Negotiation policy, every workstation is divided into negotiation and non-negotiation intervals. Such intervals are unique to every configuration of the production line; these intervals determine regions where preemption on an item is allowed with a constant negotiation time, and where workers should wait to handover at station endpoints. Results on the dynamics and throughput of a two-worker m-station system are presented as well as lost production and throughput comparisons against a non-negotiation systems with discrete stations and an always negotiate policy.
机译:研究了具有离散站点的桶式旅队的动力学,并分析了这种动力学的主题吞吐量。以前在桶式旅中进行的大多数工作都假定移交可以在整个生产线的任何位置进行。这项研究限制了切换发生在与某些实际设置相对应的站点端点。与在生产线的任何点发生的移交相比,采用离散的铲斗大队会导致吞吐量下降。由于交接只能发生在有限的点上,因此可以通过邻接矩阵和/或连接图来获得生产线的动态信息;对于两个以上的工位,当最后一个工时完成他的产品可以用几种不同的方式进行。从根本上讲,有两种截然不同的移交协议:同步,工人等到他们全部同时开始新的生产步骤;以及交错切换的异步切换协议。定义了特定的自然异步切换协议,并研究了具有离散站点的桶式旅的动力学和吞吐量。结果表明,这种异步协议减少了等待时间,因此在大多数情况下增加了生产线的吞吐量。将通过生成有限连接图来研究线路的动力学。利用该图,可以识别全局自平衡的桶式旅,并可以确定局部稳定的周期性自组织行为及其吸引盆。;还提出了一种桶式旅系统的扩展,以基于切换点来优化吞吐量。在称为“巧妙协商”策略的此修改策略中,每个工作站都分为协商间隔和非协商间隔。这样的间隔对于生产线的每种配置都是唯一的。这些间隔确定了在恒定的协商时间内允许抢占项目的区域,以及工作人员应在工作站端点等待切换的区域。给出了具有两个工位的m工位系统的动力学和吞吐量的结果,以及与具有离散工位和始终协商策略的非协商系统的生产和吞吐量损失比较。

著录项

  • 作者

    Murguia Blumenkranz, Erika.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Applied Mathematics.;Engineering Industrial.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 90 p.
  • 总页数 90
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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