Dependability and performance stochastic modelling of a two-unit repairable production system with preventive maintenance
本文用半马尔可夫过程为带预防性维护的双单元可修复生产系统建模，计算可用度、平均故障时间和总运营成本，并优化检查时间以提升系统可靠性与性能。
In this paper, a two-unit multistate repairable production system is considered in which preventive maintenance (PM) is implemented in order to improve its dependability and performance. A general model is provided for the production system using a semi-Markov process, for examining system’s limiting behaviour. Apart from combining redundancy with PM, we introduce scenarios like imperfect and failed maintenance which are usually met in real life production systems. For the proposed model, we calculate the availability, the mean time to failure and the total operational cost and we formulate optimisation problems settled with respect to the system’s inspection times. The main aim of our work is to determine the optimal inspection times and consequently the optimal PM policies to be adopted in order to optimise system’s dependability and performance.