航空发动机线性变参数建模方法研究

针对航空发动机增益调度控制技术使用的线性变参数(Linear Parameter Varying-LPV)模型,研究了两种LPV建模方法—雅克比和基于变化率方法。建立了涡扇发动机准LPV模型,进行了动态仿真验证。结果表明,与非线性模型相比,所建立的准LPV模型具有较好的动态性能,为航空发动机LPV增益控制研究提供了保证。

Study of aeroengine linear parameter varying modeling

Gain-scheduling control techniques based on the LPV(Linear Parameter Varying) model have increasingly been applied to aeroengine control system.This article describes two techniques of LPV modeling which are Jacobian technique and velocity-based technique,respectively.A quasi-LPV model of a turbofan engine is constructed and simulated over dynamic process.Compared with aeroengine nonlinear model,the results indicate this model has good dynamic performance.Thus,a practice method is provided for LPV gain-scheduling research of aeroengine control system.