用卡尔曼估值对航空发动机喘振状态预报研究

针对压缩系统的Greiter非线性模型,采用卡尔曼估值理论的方法对压缩系统进行状态估值,提出某一喘振判定准则下超前预报压气机将来某一时刻是否发生喘振,即喘振预报。

SURGE FORECAST FOR AERONAUTICAL ENGINES WITH EXTENDED KALMAN ESTIMATION

The unsteady phenomena of relating stall and surge in an axial flow compressor gas turbine engine are perplexing the indusiry which may damage the compressor even the whole engine. The optimum performance of a turbine engine is usually achieved when the compressor is operating near us maximum pressure ratio, but it is close to or penetrates the surge boundary. In order to keep she cosine performance high and avoid surge, it is necessary to carry out engine surge screenst and anti-surge control. The theory of extended Kalman estimation is applied to the state estimate of compressive system after the observability of this system is discussed and the simulation on a digital computer is taken. It is concluded that the states of a turbine engine can be estimated with the method of extended Kaiman estimation.