Research Initiation Award: Analysis and Control of Assembly Systems

研究启动奖：装配系统的分析与控制

• 批准号: 9308290
• 负责人: Izak Duenyas
• 金额: $ 8.9万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-09-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9308290&HistoricalAwards=false
• 关键词: Research; Initiation; Award; Analysis; Control

9308290 Duenyas In the past decade, there has been a growing research interest in queueing network models of manufacturing systems. This interest is due to the ability of queueing network models to capture and evaluate the effects of variability and congestion. The recent interest in pull manufacturing systems such as kanban has increased the use of queueing network models. However, an important feature of many manufacturing systems that has not yet been satisfactorily incorporated in queueing network models is assembly operations. Assembly operations are operations that require as input the output of several different production lines. The aim of this project is to develop analytical models for the analysis and control of assembly systems. Bounds and approximations will be developed for such performance measures as the throughput, variance of the number produced in a given period, mean and variance of cycle time and mean and variance of queue lengths. Our preliminary results indicate that approximating assembly systems by equivalent tandem systems provides a promising appraoch. The analytical models will be used in algorithms for the optimal design of assembly systems. We will answer design questions such as how work should be allocated between different lines ad work centers, how to set production quotas, and Work In Process Inventory levels in these systems and how variability affects the optimal design and performance of assembly systems. The researchers will work with industry to test and implement our results. The result of the research will aid manufacturers signficantly in designing more efficient assembly systems.

9308290 Duenyas在过去的十年中，人们对制造系统的排队网络模型的研究兴趣日益浓厚。这种兴趣是由于排队网络模型能够捕获和评估可变性和拥塞的影响。最近对拉动式制造系统（如看板）的兴趣增加了排队网络模型的使用。然而，许多制造系统的一个重要特征尚未令人满意地纳入排队网络模型是装配操作。装配作业是需要若干条不同生产线作为输入输出的作业。这个项目的目的是为装配系统的分析和控制开发分析模型。将为吞吐量、给定时间段内产生的数量的方差、周期时间的均值和方差以及队列长度的均值和方差等性能度量开发界限和近似。初步结果表明，用等效串联系统逼近装配系统是一种很有前途的方法。这些分析模型将用于装配系统优化设计的算法中。我们将回答设计问题，例如如何在不同的生产线和工作中心之间分配工作，如何设置生产配额，以及这些系统中的在制品库存水平，以及可变性如何影响装配系统的最佳设计和性能。研究人员将与工业界合作，测试和实施我们的研究结果。研究结果将有助于制造商设计更高效的装配系统。