GOALI: Transients of Production Systems: Theory and Applications for Real-Time Productivity Improvement

GOALI：生产系统的瞬态：实时生产力提高的理论与应用

• 批准号: 0758259
• 负责人: Semyon Meerkov
• 金额: $ 34万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-06-15 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0758259&HistoricalAwards=false
• 关键词: GOALI; Transients; Production; Systems; Theory

The steady state performance measures of production systems, such as the throughput and work-in-process, have been analyzed quantitatively for over 50 years. In contrast, the transient properties, i.e., the process of reaching the steady states, received very little attention. The transients, however, are of practical importance: Some production systems begin their shift operation with all buffers being empty, which leads to throughput losses due to transients. Therefore, analysis and minimization of such losses are of industrial importance. Clearly, the study of transients is of theoretical importance as well. The goals of this project are the development of a theory for analysis and design of production systems from the point of view of the transients and the application of this theory for productivity improvement in the automotive industry. The theoretical part of this project will be carried out through the study of the Second Largest Eigenvalues (SLEs) and Pre-Exponential Factors (PEFs) of the Markov transition matrices that describe the systems at hand. The application part of this GOALI project will be carried out at GM?s assembly and engine plants.The intellectual merit of this project is in establishing a new paradigm in production systems research (based SLEs and PEFs) and initiating a new direction in manufacturing engineering ? that of investigating production systems transients using system-theoretic techniques. The broader impact of the project is in offering industrial audiences a set of tools for productivity improvement by managing and optimization of production systems transients and by exposing graduate students to the realities of factory floor operations. These activities will be facilitated by industrial short courses to be offered by the P.I. and by including the results of this research in the second edition of the textbook ?Production Systems Engineering?, recently published by the P.I.

生产系统的稳态性能指标，如吞吐量和在制品，已经定量分析了50多年。相反，瞬态特性，即，达到稳定状态的过程，很少受到关注。然而，瞬变具有实际重要性：某些生产系统在所有缓冲器为空的情况下开始轮班操作，这会导致瞬变导致吞吐量损失。因此，分析和最小化这种损失具有工业重要性。显然，瞬变过程的研究也具有重要的理论意义。 该项目的目标是从瞬态的角度开发生产系统的分析和设计理论，并将该理论应用于汽车行业的生产率提高。该项目的理论部分将通过研究描述手头系统的马尔可夫转移矩阵的第二大特征值（SLEs）和前指数因子（PEFs）来进行。该GOALI项目的应用部分将在通用汽车公司进行？该项目的智力价值在于建立了生产系统研究的新范式（基于SLEs和PEFs），并开创了制造工程的新方向。使用系统理论技术研究生产系统瞬变。该项目的更广泛的影响是通过管理和优化生产系统瞬变以及让研究生接触工厂车间操作的现实，为工业受众提供一套提高生产力的工具。这些活动将通过由P.I.提供的工业短期课程来促进。并将这项研究的结果纳入第二版教科书？生产系统工程？，最近由P.I.