关键词: 航空发动机, 视情维修, 性能衰退, 维修决策控制限, 比例危险-比例优势模型, 在翼寿命

Abstract:

Based on CBM strategy, the life on wing prediction of aeroengine was made herein, aiming at providing airlines with a scientific and reasonable basis for the engine's plans of removal. Firstly, according to the aeroengine's historical data of removal, a mathematical model of the maintenance decision-making control limit was established. And the establishment of this model was based on the proportional hazards-proportional odds model. Then using time series prediction method based on least squares support vector machine, and combined with the condition trend prediction of engine, life on wing of engine was predicted. Finally, in the case study of a concrete instance, the method was proved to be effective and to have a high practical value.

Key words: aeroengine, condition based maintenance(CBM)；performance degradation, maintenance decision-making control limit；proportional hazards-proportional odds model；life on wing