基于平衡流形的航空发动机LPV建模方法

针对航空发动机线性变参数模型,基于平衡流形原理,研究了一种改进LPV建模方法.首先,根据平衡流形原理,构造涡扇发动机平衡流形参数化形式.其次,根据某型涡扇发动机非线性模型,建立基于局部线性模型的涡扇发动机准LPV模型.然后,建立基于平衡流形的航空发动机改进准LPV模型,即:利用平衡流形参数化形式,根据调度变量实时估算发动机平衡态,以更新发动机准LPV模型的参考平衡态.最后,通过对发动机从慢车状态到最大状态的阶梯加速过程进行仿真,表明改进UP模型的稳态和动态响应特性与发动机非线性模型保持很好地一致.

Equilibrium-manifold based linear parameter varyingmodeling for aeroengine

An equilibrium-manifold based LPV(Linear Parameter Varying) modeling method was put forward.Firstly,according to the equilibrium manifold theory,the equilibrium manifold of a turbofan engine was parameterized by a scheduling variable.Then,a conventional LPV model of a turbofan engine was constructed based on the turbofan engine nonlinear model.Next,the conventional LPV model was modified by using the parameterized equilibrium manifold,in which the equilibrium point was estimated in real-time and was used to...