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成本约束的表决冗余系统可靠度优化与分配

DOI: 10.13700/j.bh.1001-5965.2013.0765, PP. 1747-1753

Keywords: 可靠度,冗余度,表决器,增广拉格朗日乘子法,鱼群算法

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Abstract:

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.

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