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实际装备使用工程中,系统性能随工作时间延长而缓慢劣化并最终导致劣化故障发生而需进行更换,这一过程往往伴随着各种随机冲击,系统因故障的突然发生而失效,即多重故障并发。从维修工程的实际问题出发,考虑劣化故障与冲击故障并发以及多重故障之间存在相关性的情况,建立了序贯检测条件下基于多级控制限的单部件系统视情维修模型,给出了在预定维修策略下系统维修费用率的数学表达式,并以长期运行费用率最低为约束条件对系统维修阈值进行优化。通过实例与基于定期检测的维修策略进行对比,验证了模型的合理性和有效性。
The actual equipment used in engineering, system performance with the working hours and slow deterioration and eventually lead to deterioration of the failure occurred to be replaced, the process is often accompanied by a variety of random shocks, the system failure due to sudden failure, that is, multiple fault concurrency . Considering the practical problems of maintenance engineering and considering the existence of the correlation between deterioration faults and impact faults and multiple faults, a condition-based maintenance model of single-component system based on multi-level control limits under sequential detection conditions is established. Under the predetermined maintenance strategy, the mathematical expression of the system maintenance expense ratio is optimized, and the system maintenance threshold is optimized with the lowest long-term operating expense ratio as the constraint condition. An example is compared with the maintenance strategy based on periodic inspection to verify the rationality and effectiveness of the model.