Design Of Reconfigurable Manufacturing Systems Configurations And Configuration Paths On Multi-Product Families And Changing Demand

Reconfigurable manufacturing systems (RMS) are those designed for multi-products and Changing demand, which have both customized flexibility and high productivity. The configuration and configuration path selection methodology of RMS are key themes of RMSdesign. With financially supported by National 863 Project--the technology of reconfigurablemanufacturing systems (No.2001AA412160), using graph theory, queuing theory and probability theory, the models of the configuration and configuration path selection of RMS are built and the methodology of the configuration and configuration path selection under multi-products and Changing demand or stochastic demand of RMS are systematically studied in this dissertation. The thesis aims to create theoretical basis for particular design and simulation research of RMS, as well as to provide theoretical and methodological guidance for implementing RMS successfully.In chapter 1, Historical and technique background bringing RMS are introduced. Research contents of RMS design are illustrated. State-of-the-Art in RMS research is summarized. The research meaning, primary contents, objects and general structure of the thesis are given.In chapter 2, the methodologies and basic theory of RMS design are discussed. The essence concept and ideas of RMS configurations and configuration paths design under multi-products and Changing demand are presented. The basic contents, design process and means, correlative theory and algorithm of RMS configurations and configuration paths design are illustrated. RMS configuration structure and reconfiguration ways between RMS configurations and calculating the reconfiguration cost are given. The principle, approach and step of operation clustering in part family are introduced. Three key design technologies of RMS configurations and configuration paths are presented. Finally, the essence contents, algorithm and modeling methodologies of graph theory and queuing theory that used in this thesis are given.In chapter 3, RMS configurations and configuration paths design under multi-product families and un-stochastic Changing demand are researched. First, the cost models for every production period of RMS, the reconfiguration cost models and the lifetime cost model of RMS. Second, the directed graphs of configurations of RMS at every production period are built. Finally, based on the directed graph, the K-optimal cost configurations of RMS at every production period are found by using double sweep algorithm. According to the demand volume of each member of part families, the central production period of each member is decided. Analyzing the unable machining capacity of the station in an RMS, the non-central production period of each member is found by adjusting the central production period. Under different sequence of each member in part families, based on the central and un-central production period, the K-optimal cost configuration paths are found, respectively. Comparing the found K-optimal cost configuration paths above, the optimal and sub-optimal configuration paths across the production periods are figured out. A case study illustrates the developed method is valid.In chapter 4, RMS configurations and configuration paths design for single product family under stochastic demand are researched. The queuing model and the state probability transition...