多设备混联系统机会维护策略研究

发布时间：2018-10-12 21:49

【摘要】：制造型企业要想获得高经济效益,必须有效控制生产系统的维修成本。系统结构日益复杂,组成设备之间的联系日益紧密,故障规律也趋向于多样化。如何建立一种切实可行的维修策略以减少企业的维修成本和停机损失已成为企业运营管理中必须要考虑的关键问题。本文针对多设备混联结构的生产系统,根据系统需要控制的运行目标的不同,分别建立了以可靠度和损失期望为基础的机会维修策略,综合考虑设备间维修的经济相关性和结构相关性,在有限时间域内建立了以维修成本率最小为目标的维修模型。首先,阐述了本文的研究背景及意义,对国内外研究现状进行综述。在此基础上详细介绍了维修管理理论、可靠性和机会维修的相关概念,并对建模所需的数学基础知识进行了介绍。其次,将役龄改善因子及故障率劣化因子综合考虑来描述设备的故障率演化规则。以单设备为研究对象,先后建立了基于可靠度和损失期望的预防维修模型,并据此进行了算例分析,求得单设备在不同决策依据下的最优预防维修策略。然后,在单设备建模的基础上,将研究对象拓展为多设备混联结构的生产系统。引入机会维修思想,综合考虑经济相关性和结构相关性,分别建立了基于可靠度和损失期望的多设备机会维修模型。引入结构影响矩阵来描述设备间的结构相关性,并运用遗传算法对模型进行了算例分析。最后,以M企业的生产线为实证研究对象,通过分析设备的历史故障数据,对文中建立的模型进行了验证,并分析了影响维修决策的关键因素,为模型的应用提供支持。
[Abstract]:In order to obtain high economic benefit, manufacturing enterprises must effectively control the maintenance cost of production system. The structure of the system is becoming more and more complex, the relationship between the components is becoming more and more close, and the fault rules tend to be diversified. How to establish a feasible maintenance strategy to reduce the cost of maintenance and loss of shutdown has become a key issue that must be considered in the operation and management of enterprises. In this paper, an opportunistic maintenance strategy based on reliability and loss expectation is established for the production system with multi-equipment hybrid structure, according to the different operation objectives to be controlled by the system. Considering the economic and structural correlation of maintenance, a maintenance model with minimum maintenance cost rate is established in finite time domain. Firstly, the research background and significance of this paper are expounded, and the current research situation at home and abroad is summarized. On this basis, the theory of maintenance management, the concepts of reliability and opportunity maintenance are introduced in detail, and the basic mathematical knowledge of modeling is also introduced. Secondly, the service age improvement factor and the failure rate deterioration factor are considered synthetically to describe the evolution rules of the equipment failure rate. A preventive maintenance model based on reliability and loss expectation is established for a single equipment, and an example is given to obtain the optimal preventive maintenance strategy for a single equipment based on different decision bases. Then, on the basis of single equipment modeling, the research object is extended to multi-equipment hybrid production system. An opportunity maintenance model based on reliability and loss expectation is established by introducing the idea of opportunistic maintenance and considering the economic and structural correlation. The structural influence matrix is introduced to describe the structural correlation between devices, and the genetic algorithm is used to analyze the model. Finally, taking the production line of M enterprise as the empirical research object, the model is verified by analyzing the historical fault data of the equipment, and the key factors influencing the maintenance decision are analyzed to provide support for the application of the model.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH17

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