民航发动机视情维修决策方法

为了提供可行的民航发动机视情维修决策方法，首先介绍了民航发动机视情维修决策理论。基于可靠性和状态数据建立了比例强度模型，根据该模型实现了发动机最优预防维修间隔决策和拆换决策，并通过收集发动机运行役龄和状态数据，实现了发动机在翼时间预测。最后以某航空公司CF6—80C2型号的发动机机队为应用实例，研究发现完备的发动机运营数据是准确决策的关键。研究结果表明，这些视情维修决策方法有助于更好地控制发动机维修活动和在翼时间，从而减少风险和维修成本。

CONDITION-BASED MAINTENANCE DECISION MAKING METHODS FOR CIVIL AEROENGINE

To provide some feasible condition-based maintenance (CBM) decision making methods for civil aero-engine,firstly,the theory of aeroengine CBM decision making is described.The proportional intensity (PI) model is established based on the reliability and condition monitoring data.According to the model,the decision making methods are proposed for the optimal preventive maintenance (PM) interval and removal.Then,the time on wing(TOW) is predicted by collecting actual data based on the engine age and operating conditions.Finally,an exam-ple of a fleet for CF6-80C2 engines is illustrated.It shows that sufficient engine operation data are the key of ac-curate decision making.Results indicate that the CBM decision making methods are helpful for engineers in air-lines to control engine maintenance actions and TOW,thus decreasing risks and maintenance costs.