基于模糊方法的系统可靠性分配

在系统设计初期 ,由于设计方案尚未定型 ,系统的可靠性指标以及相关的重量、体积、费用等限制都不十分明确 ,在这种情况下 ,要进行可靠性分配和冗余度优化 ,即可引入模糊方法 ,一方面用以刻划设计目标和限制条件中所存在的模糊不确定性 ,另一方面解决混合整数多目标非线性优化的数学建模问题 .本文根据上述实际背景 ,提出一种改进的模糊优化算法 ,利用该算法可以在满足多个不确定限制条件的情况下对串联系统各组成单元的可靠度及冗余度同时进行优化 ,并通过改进 ,借鉴了经典优化方法的优点 ,可在计算简便的基础上保证结果的精度 .本文最后给出了具体的计算实例 .

Optimal Apportionment of System Reliability

During the initial stages of the conceptual design and prototype construction of engineering system, fuzzy can be employed to perform reliability apportionment and redundancy optimize. On one hand, fuzzy method can describe the uncertainty consist in limits and design aims, on the other hand it can modal the mixed integer multi\|objects nonlinear optimize problem. In this paper, a new fuzzy optimal algorithm which ensure the high efficiency and exact solutions of the optimal apportionmet of the system reliability and redundancy synchronously be presented. The simulation result shows the performance and feasibility of the new method finally.