依据部件单位工作时间费用(cost per operating unit of time,CPUT)随部件连续无维修工作时间的变化规律,可以确定部件最优定时维修间隔期。由多部件构成的复杂产品,需要对其各部件最优定时维修间隔期进行整合。根据产品各构成部件的可...依据部件单位工作时间费用(cost per operating unit of time,CPUT)随部件连续无维修工作时间的变化规律,可以确定部件最优定时维修间隔期。由多部件构成的复杂产品,需要对其各部件最优定时维修间隔期进行整合。根据产品各构成部件的可靠性重要度(reliability importance,RI),建立了复杂产品单位工作时间费用随产品连续无维修工作时间变化关系,获得了复杂产品最优定时维修间隔期。展开更多
Design for life-time performance and proper maintenance measures are usually needed to prolong the mean-time-between-failures of complex equipments such as internal combustion engines.To reach this,it is important to ...Design for life-time performance and proper maintenance measures are usually needed to prolong the mean-time-between-failures of complex equipments such as internal combustion engines.To reach this,it is important to obtain the information of time-varying system performance in design stage and to identify the structural change at each moment.So a multidisciplinary model based method is studied in this paper to unify the time-varying performance(TVP) prediction and system identification(SI) of equipments.The related multidisciplinary model in this paper should be not only precise to give simulation results but also sensitive to the variation of system parameters.So the varying history of system performance along with the structural change can be obtained from the model.Then the value of system parameters can be identified by seeking roots with given detected responding data and relationship between system responding data and system parameters.A case study on a low power gasoline engine shows that the method presented in this paper can provide useful information for the development and maintenance of complex equipments.展开更多
文摘依据部件单位工作时间费用(cost per operating unit of time,CPUT)随部件连续无维修工作时间的变化规律,可以确定部件最优定时维修间隔期。由多部件构成的复杂产品,需要对其各部件最优定时维修间隔期进行整合。根据产品各构成部件的可靠性重要度(reliability importance,RI),建立了复杂产品单位工作时间费用随产品连续无维修工作时间变化关系,获得了复杂产品最优定时维修间隔期。
基金the National Natural Science Foundation of China (Nos. 50805091 and 50705055)the National Basic Research Program (973) of China(No. 2006CB705402)the Basic Research Programs of Science and Technology Commission of Shanghai City(No. 07JC14027)
文摘Design for life-time performance and proper maintenance measures are usually needed to prolong the mean-time-between-failures of complex equipments such as internal combustion engines.To reach this,it is important to obtain the information of time-varying system performance in design stage and to identify the structural change at each moment.So a multidisciplinary model based method is studied in this paper to unify the time-varying performance(TVP) prediction and system identification(SI) of equipments.The related multidisciplinary model in this paper should be not only precise to give simulation results but also sensitive to the variation of system parameters.So the varying history of system performance along with the structural change can be obtained from the model.Then the value of system parameters can be identified by seeking roots with given detected responding data and relationship between system responding data and system parameters.A case study on a low power gasoline engine shows that the method presented in this paper can provide useful information for the development and maintenance of complex equipments.
