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文章研究了两部件系统的预防性维修组合问题。根据子系统正常与否,将系统分为四个不同的运行状态。当单个子系统发生故障时,系统能够继续工作,但单位时间的收益将发生变化。定期对子系统进行预防性维修,可以减小子系统的故障率。构建了状态转移方程,并求出各状态的稳态概率。综合考虑了单位产品的获利、减产的损失、不合格品的损失、故障维修费用和预防性维修费用等,以有效生产率满足阈值为约束条件,以单位时间净收益最大为目标,提出预防性维修组合优化模型。分析了模型参数对预防性维修决策的影响。
The paper studies the preventive maintenance combination of two-component system. Depending on whether the subsystem is normal or not, the system is divided into four different operating states. When a single subsystem fails, the system can continue to work, but the benefits per unit time will change. Preventative maintenance of the subsystem on a regular basis can reduce the failure rate of the subsystem. The state transition equation is constructed and the steady-state probability of each state is obtained. Considering the profit of unit product, the loss of production, the loss of nonconforming product, the cost of fault maintenance and the cost of preventive maintenance, the effective productivity satisfies the threshold as the constraint and the goal of maximizing the net income per unit time, Maintenance portfolio optimization model. The influence of model parameters on preventive maintenance decision was analyzed.