半導(dǎo)體生產(chǎn)線動態(tài)維護策略研究
[Abstract]:Semiconductor production line has complex structure, typical reentry characteristics, various kinds of processed products, high integration of equipment and high cost. In recent years, semiconductor manufacturing industry has developed rapidly and the competition is fierce. Reasonable maintenance strategy can maximize the value of equipment, bring higher profits and enhance the market competitiveness of enterprises. In this paper, the Markov decision process MDP (markov decision process) model of equipment production and maintenance system is established. Considering the variable maintenance behavior selection and random state transition, the dynamic maintenance strategy of semiconductor production line equipment is studied, and the maintenance time and behavior synthesis to maximize the benefit are obtained. This dynamic maintenance strategy is applied to a typical semiconductor manufacturing process-Mini-Fab model to further study the scheduling rules of each unit in the model. The optimal dynamic maintenance strategy is obtained by optimizing the coupling problem between manufacturing and maintenance. First of all, this paper introduces the research background and significance, analyzes the domestic and foreign research status from industry and academia, and details the research content and theoretical framework. Secondly, the related theories of reliability analysis and maintenance research, as well as the types and judgment indexes of production scheduling are expounded, which provide theoretical support for the subsequent research. Then, considering variable maintenance behavior selection and random state transition probability, a mathematical model of dynamic maintenance strategy for semiconductor devices based on MDP model is established. The MDP model is used to simulate the state transition in the process of equipment maintenance, and the comprehensive scheme about the maintenance time and behavior is obtained by taking the benefit of the equipment as the objective function. Based on the characteristics of the established mathematical model, the particle swarm optimization algorithm with genetic crossover factor is introduced, and the optimal dynamic maintenance strategy is obtained. Finally, the dynamic maintenance strategy is applied to the Mini-Fab model, and further considering the production process of the system, the problem of joint selection in the conflict between maintenance and processing and the optimal scheduling rules for each unit of the system are studied. Thus, the integrated strategy of production scheduling and dynamic maintenance scheme is obtained.
【學(xué)位授予單位】:廣東工業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TN305;TP18
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