并联系统预防性维修费用的优化方法

Optimal Method to Minimize the Preventive Maintenance Cost of Parallel Systems

主要针对并联系统建立了有限时间区间的预防性维修优化模型,该模型充分考虑到预防维修可以提高系统生产效益的同时,其故障率会随着维修次数的增加而上升,引入役龄回退因子对预防维修活动前后系统性能的动态变化进行了描述,而且还将系统可靠度作为约束条件。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,对其进行了深入分析,实例验证了该优化模型的正确性。

By taking into account that failure rate will increase with the rose of maintenance times, the recursion relationship of failure rate before and after preventive maintenance was built up concerning with the concept of age reduction factor. The main contribution is to present an optimal policy research model in finite time horizon for parallel systems based on reliability constrains. Adjacent problem was also theoretically solved, and the change of system's maintenance cost along with reliability constrain was researched.