Agile Control System for Reconfigurable Manufacturing Systems

可重构制造系统的敏捷控制系统

基本信息

批准号：
15510132
负责人：
TAKAHASHI Katsuhiko
金额：
$ 2.37万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

The configuration of production system affects the performance of the production system, and there is a lot of research on configuring production systems, such as assembly line balancing and cell formation. Under the specified configuration, the performance of production system is affected by production ordering and buffer allocation. Ordering systems determine the timing and quantity in order release for each stage of multi-stage production inventory systems with allocated buffer, and just-in-time (JIT) ordering systems determine them on the basis of the actual demand. In most of the previous literature on JIT ordering systems, stable changes in demand have been assumed, and the influence of unstable changes in demand had never been analyzed. Based on the background, some reactive systems have been proposed for the JIT ordering system. In the reactive JIT ordering system, unstable changes in demand are detected, and the buffer size is adjusted as a reaction to the detected changes. However, only by adjusting the buffer size, the adaptability is limited. Recently, reconfigurable manufacturing systems (RMSs) have been pointed out, and systems which can adjust the configuration in response to environmental changes are likely to be realized. Therefore, this report introduces dynamic line balancing and buffer allocation in a RMS controlled by the JIT ordering system. In the proposed system, unstable changes in demand are detected by the exponentially weighted moving average (EWMA) charts, and the configuration of production system, that is, the number of stages and buffer size, are altered in response to the detected unstable changes, and work elements are allocated to each stage by line balancing. Also, a neural network is applied to improve the performance to detect unstable changes in demand. The effectiveness of the proposed system is analyzed and compared with that of the previous system by simulation experiments.

生产系统的配置会影响生产系统的性能，并且在配置生产系统（例如组装线平衡和单元格形成）方面有很多研究。在指定的配置下，生产系统的性能受生产排序和缓冲分配的影响。订购系统确定了带有分配缓冲区的多阶段生产库存系统的每个阶段的订单释放的时间和数量，以及基于实际需求的即时（JIT）订购系统确定它们。在以前的大多数有关JIT订购系统的文献中，都假定了需求稳定的变化，并且从未分析需求变化的影响。基于背景，已经为JIT排序系统提出了一些反应性系统。在反应性JIT排序系统中，检测到不稳定的需求变化，缓冲尺寸被调整为对检测到的变化的反应。但是，仅通过调整缓冲尺寸，适应性才有限制。最近，已经指出了可重新配置的制造系统（RMS），并且可以实现可以根据环境变化来调整配置的系统。因此，本报告在由JIT订购系统控制的RMS中介绍了动态线平衡和缓冲分配。在拟议的系统中，需求不稳定的变化是通过指数加权的移动平均值（EWMA）图表检测到的，并且生产系统的配置（即阶段和缓冲区的数量和缓冲区的数量）在响应于检测到的不稳定变化的响应中会改变，并且工作元素通过线平衡分配给每个阶段。此外，还采用神经网络来提高性能，以检测需求不稳定的变化。通过模拟实验分析了提出系统的有效性，并将其与先前系统的有效性进行了比较。