航空发动机全寿命期自适应寿命延长控制

Adaptive Life Extending Control of Aircraft Engine in Whole Life

关键词:  航空发动机  寿命延长控制,双层控制系统结构,多级控制策略 

Key words:  Aircraft engine  Life extending control  Double-layer control system structure  Multi-level control strategy

摘要:

为了避免由于航空发动机部件性能退化,导致单一寿命延长控制器为延长部件寿命,过分限制发动机基本性能,进而使得发动机不能满足正常使用需求,在分析发动机性能退化对其基本性能及部件寿命影响的基础上,根据不同性能退化水平设计软中硬三级寿命延长控制策略,并利用双层控制系统结构来协调多个控制器间的切换。仿真结果显示,自适应寿命延长控制系统可以准确地评估发动机部件性能退化情况,并选择合适的寿命延长控制策略,从而在保证发动机全寿命期内基本性能的基础上,延长部件寿命。 

Abstract:

Because of performance degradation of aeroengine components, a single life extending controller, which aims to extend component life, may excessively restrict the engine basic performance, thus making the engine not meet the normal needs. In order to solve this problem, based on the analysis of its basic performance and component life under engine performance degradation, appropriate life extending control strategy for different levels of performance degradation was designed. And a double-layer control system structure was used to coordinate switch of multiple controllers. The simulation results show that adaptive life extending control system can choose appropriate life extending control strategy based on current engine performance status,which can extend component life and maintain the basic performance of the engine in the whole life. 