余度设计中的系统可靠性最优分配模型

 将任务可靠度、基本可靠度均作为系统可靠性优化设计的边界约束,并将系统研制费用视为目标函数,建立了一新的系统可靠性最优分配模型,利用该模型设计出的系统在研制费用最少的情况下,任务可靠度与基本可靠度均达到设计要求。此外,还分别建立了串—并联和并—串联两种余度设计系统的最少研制费用模型。最后通过多个实例验证了上述模型,发现系统可靠性最优分配模型考虑了更多的因素,更有实用价值。

System Reliability Distribution Optimization Model For Redundancy Design

The task reliability level and the basic reliability level are regarded as the constraint conditions, and the development cost of the system is as the object function, so a new system reliability distribution optimization model for redundant design is presented. By means of this model, the system designed can meet the challenge of the task reliability and the basic reliability at a least development cost. Moreover, the least development cost models for the series-parallel and the parallel-series redundancy design are established. At last, all the three models above are verified by several examples and it is shown that the design results given by the system reliability distribution optimization model are more valuable for engineering design.