基于优化策略的串并联系统预防维修周期研究

为了进行预防维修,提高系统可靠性,对系统维修费用会随着维修次数的增加而上升问题,提出最小优化方法.针对工程中常用的串并联系统,在考虑故障率随维修次数变化的条件下,引入役龄回退因子,提出一种可靠度为约束的系统预防维修费用最小的优化模型,在运用遗传算法进行优化求解的基础上,研究了系统总维修费用随可靠度的变化率.为了更好地确保遗传算法获得全局最优解,在传统遗传算法的基础上采用了并行操作、保留最优个体等方法.通过实例验证了优化模型的正确性与可用性,对模型作进一步的扩展,还可用于更一般复杂的系统.

Preventive Maintenance Period Research of series-parallel Systems Based on Optimal Policy

Preventive Maintenance can reduce failure rate and improve system performance,but with the increase of Preventive Maintenance times,the maintenance costs will go up.Based on the dynamic changing rules of failure rate,an optimal Policy research model for series-parallel system was presented about Preventive Maintenance Period.The cost function of a maintenance policy was minimized under given reliability constraint,and the recursion relationship of failure rate before and after preventive maintenance was bui...