根据造成装备故障的老化失效和外部环境因素,将装备故障分为内部故障和外部故障,综合考虑装备的完美修理和换件2种维修策略,基于PH分布对装备内外部故障过程的描述建立了装备的维修模型。分析了该模型的2个性能测度,即单位时间内平均修理次数和换件次数,并给出了具体的算例。仿真结果表明,该模型具有通用性和实用性。 According to the aging failure caused by equipment failure and external environmental factors, the equipment failures are divided into internal faults and external faults. Considering the perfect repair of equipment and two replacement strategies, the description of internal and external fault process based on PH distribution is established Equipment maintenance model. The two performance measures of the model are analyzed, that is, the average number of repairs per unit time and the number of changes, and a specific example is given. Simulation results show that the model is universal and practical.