生产系统可靠性分配方法与案例研究

发布时间：2018-12-27 19:53

【摘要】：自可靠性问题提出以来，诸多学者对产品可靠性、软件可靠性等复杂系统的可靠性问题进行大量的研究，取得了大量的研究成果，但是并没有对生产系统的可靠性相关问题进行深入研究。本文以生产系统为研究对象，对生产系统可靠性及失效等相关问题进行描述，并在生产系统可靠性预计的基础上，提出了适用于生产系统可靠性分配的方法。可靠性预计和可靠性分配是生产系统设计和重构的重要环节，应首先根据生产单元（子系统）可靠性水平对系统整体可靠性水平进行预计，再根据预计值提出合理的系统可靠性分配目标值，这是进行系统可靠性分配的前提。而在实际生产中为了达到系统的整体可靠性目标，就需要可靠性设计人员和工程决策人员将系统可靠性目标值逐步分配到各生产单元（或子系统），靠生产单元（或子系统）达到各自的可靠性分配值来保证系统整体的可靠性，这就是本文所要重点研究的生产系统可靠性分配问题。可靠性分配分为无约束的可靠性分配和有约束的可靠性分配，本文的思路是先按照无约束的分配方法将系统可靠度分配到各个生产单元，，再进行基于费用等约束条件的可靠性优化分配，即有约束的可靠性分配。最后可在掌握单元内部各组成部分可靠性情况的基础上，将分配到单元的可靠度作为目标值，进一步将其分配到单元内的设备和生产过程。其中合理的预计及分配方法是达到系统可靠性目标的关键因素。最后运用论文中所阐述的预计和分配方法，通过一个实际案例完整地表述从预计到分配的具体实施过程，并通过系统可靠性仿真软件BlockSim进行仿真，模拟生产系统可靠性分配过程，并得到经优化的可靠性分配结果。
[Abstract]:Since the reliability problem was put forward, many scholars have done a lot of research on the reliability of complex systems, such as product reliability, software reliability and so on, and obtained a lot of research results. However, there is no in-depth study on the reliability of the production system. In this paper, taking the production system as the research object, the reliability and failure of the production system are described, and on the basis of the reliability prediction of the production system, a method suitable for the reliability distribution of the production system is put forward. Reliability prediction and reliability distribution is an important link in the design and reconfiguration of production system. Firstly, the reliability level of the whole system should be predicted according to the reliability level of production unit (subsystem). Then the reasonable target value of system reliability assignment is put forward according to the predicted value, which is the premise of system reliability assignment. In order to achieve the overall reliability goal of the system in actual production, reliability designers and engineering decision makers need to distribute the reliability target value of the system to each production unit (or subsystem) step by step. The reliability distribution problem of production system is studied in this paper, which depends on the reliability distribution value of production unit (or subsystem) to ensure the overall reliability of the system. The reliability distribution is divided into unconstrained reliability distribution and constrained reliability distribution. The idea of this paper is to assign the system reliability to each production unit according to the unconstrained distribution method. Then the optimal allocation of reliability based on cost and other constraints is carried out, that is, the constrained reliability allocation. Finally, on the basis of mastering the reliability of each component within the unit, the reliability of the unit assigned to the unit can be taken as the target value, and further assigned to the equipment and production process in the unit. The reasonable prediction and allocation method is the key factor to achieve the reliability goal of the system. Finally, using the prediction and allocation method described in the paper, a practical case is used to describe the implementation process from prediction to allocation, and the system reliability simulation software BlockSim is used to simulate. The reliability distribution process of production system is simulated, and the optimized reliability distribution results are obtained.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB114.3

【共引文献】