流水－单元混合装配系统可靠性评估模型的建模与分析

As an innovation of production mode, the hybrid assembly system of traditional production line and Seru is facing some new problems in its system conversion and operation stages. Based on the viewpoint of reliability management, we need to establish a suitable reliability index system, and it is also necessary to design a framework of reliability research for the hybrid assembly system. In the study of reliability indices, we focus on the problem how to measure human factors and non-human factors in the production system, and some methods based on the fuzzy theory are proposed for solving it. Considering about the multi-path processing problem caused by Serus in the hybrid assembly system, and the problem that the states of reliability factors are continuously changing, this study designs a system reliability assessment model based on the combination of directed graph methods and fault tree analysis techniques. Because of the existence of the dynamic characteristics of the hybrid assembly system of traditional production line and Seru, we adopt prediction methods to construct a system reliability prediction model. The goal of this project is to describe the system structure and all reliability factors more accurately, and find the relationship function between these factors and the system reliability. In this project, we plan to construct a general reliability assessment and prediction model for the hybrid assembly system. This search does not only make contributions to the study field of reliability management theory, but also provides a powerful tool and theoretical and technical supports to manufacturing enterprises for solving problems in the process of the production line transformation and production mode improving.

本项目旨在面向流水－单元混合装配系统在系统转化和运行中的现实需求，从可靠性管理的视角，研究混合装配系统的可靠性指标体系的建立问题，提出可靠性评估的总体框架；考虑系统中人因和非人因影响因素的模糊特性，设计可靠性指标的模糊量化方法；考虑混合装配系统中的多路径加工问题、可靠性影响因素状态的连续变化问题，基于有向图与故障树分析的方法，为流水－单元混合装配系统构建可靠性评估模型；考虑系统运行中的可靠性变化问题以及系统转化中的动态特性，结合预测技术构建可靠性预估模型。该研究旨在更精确地刻画系统结构及各影响因素在系统转化及运行中的状态变化，更准确地度量这些因素对系统可靠性的影响，进而构建适用于流水－单元混合装配系统的可靠性评估及预估函数和模型。本项目的研究成果不仅在理论上对经典可靠性理论和方法进行了扩充与发展，而且为制造企业进行生产线的改造和生产模式的升级提供了理论支持、技术保障和有力工具。