最小故障率下数控组合机床平均维修时间确定

摘要

为合理计算数控组合机床整机平均维修时间,本文提出基于系统组件故障率和维修时间模型来确定系统平均维修时间的方法.根据数控组合机床子系统故障信息,引入平均秩次法进行基于时间相关的子系统故障率建模,进而实现数控组合机床系统故障率建模.结合各子系统维修时间函数,建立了数控组合机床整机平均维修时间模型,并确定了最小故障次数下的整机平均维修时间.本文研究为系统维修时间设计及维修计划制定奠定了理论基础.%In order to reasonably compute the average maintenance time of combination of CNC machine tools ,a calculation method of the average maintenance time is developed based on the system component failure rate and maintenance time model . First , according to the subsystem fault information of the combination of CNC machine ,the mean rank method is introduced to establish the time related subsystem failure rate model .Then the system failure rate model of the combination of CNC machine tools is derived . Finally , combining the subsystem maintenance time function , the average maintenance time model of the combination of CNC machine tools is established , and the average maintenance time is determined by the minimum number of failures . This research may provide reference for system maintenance time design and maintenance planning .