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在成本限制下,为使系统的可靠度最大,系统采用表决冗余结构,并对具有表决冗余结构的系统可靠度和冗余度同时进行优化和分配,优化方法采用增广拉格朗日乘子法和鱼群算法相结合的混合算法;不仅分析了成本与可靠度的关系,同时讨论了表决器失效率对系统可靠度的影响;最后,以某型飞机的纵向俯仰运动飞行控制系统为例,仿真说明了在成本约束下,为使系统可靠度尽可能高,系统采用四余度配置更合理,且在只有单个表决条件下,应选取可靠度尽可能高的表决器.为避免单个表决器失效对系统可靠度的影响,实际系统中常选择多表决器冗余结构.
In order to maximize the reliability of the system under the cost constraint, the system adopts the voting redundancy structure and optimizes and distributes the system reliability and redundancy with the voting redundant structure at the same time. The optimization method adopts Augmented Lagrangian Multiplier method and fish-swarm algorithm. It not only analyzes the relationship between cost and reliability, but also discusses the influence of voter failure rate on the reliability of the system. Finally, with the longitudinal pitch motion flight control system As an example, the simulation shows that under the constraint of cost, in order to make the system reliability as high as possible, the system adopts four-rest configuration is more reasonable, and in a single voting condition, the voting device with the highest possible reliability should be chosen. The effect of failure of a single voter on the reliability of the system often selects the redundant structure of the multi-voter in the actual system.