基于飞行数据的航空发动机寿命监视系统设计

对飞行数据中反映发动机寿命损耗的参数进行处理,即野点剔除、峰谷点检测、无效幅值去除,在此基础上,应用一种新的实时雨流计数方法形成可用于寿命计算的标准循环,对发动机寿命影响较大的主要循环进行寿命消耗统计,应用线性累积损伤原理得到每次飞行后的使用寿命消耗百分数。设计了基于飞行数据的某型发动机寿命监视系统,并且建立寿命消耗数据库,为使用和维修该型发动机提供了重要的参考依据。

Design of Aeroengine Life Monitor System Based on Flight Data

Aeroengine life consuming data are processed in flight data file, which are abnormal data rejection, peak and valley value detection, invalid swing removal. Normal cycle for the life calculation is established by means of a new real - time rain - flow counting method. The life consuming is added up for main cycles that seriously affect the engine life, then, percentage of service life reduction is obtained for each flight according to the linear accumulation theory. A life monitor system is designed for a typical aeroengine. The life consuming database is built and managed in order to provide reference to aeroengine operation and maintenance.