关键词: 维护、维修和大修, 民航发动机, 拆发日期, 线性退化轨道, 预测系统

Abstract: Aiming at the business requirements of Maintenance,Repair and Operations (MRO) for civil aircraft engine,a software system for engine removal date prediction was developed.The system predicted the removal date of the on-wing engines according to three types of factors affecting the service of the aircraft engine,which were performance,fault and time limit.The concept of damage baseline was proposed by considering the factors that the major fault of the aircraft core engine was always limited,and a damage propagation model based on linear degradation path was established to realize the removal date prediction based on hardware damage fault.This system was currently in service in Air China Limited,and was seamlessly integrated with the existing engine health management and maintenance decision support system via interfaces as a subsystem.The developed system obtained support data from its parent system and provided the prediction results for its parent system as support data.Thus an integrated process was formed including the engine condition monitoring process,the removal date prediction process and the maintenance decision-making process,which satisfied the MRO requirements of Air China Limited.

Key words: maintance,repaire and operations, civil aircraft engine, removal date, linear degradation path, prediction system