航空发动机LPV建模方法改进  

Improvement of the LPV(Linear Parameter Varying) Method for Modeling an Aeroengine

作　　者：李述清[1] 张胜修[1] 周志清[1] 马昌兵[1] 

机构地区：[1]第二炮兵工程学院精确制导教研室,陕西西安710025

出　　处：《热能动力工程》2011年第2期168-170,251-252,共3页Journal of Engineering for Thermal Energy and Power

摘　　要：针对航空发动机线性变参数(Linear Parameter Var-ying:LPV)模型存在误差积累的问题,提出一种改进LPV模型。以某型涡扇发动机非线性模型为基础,建立以低压转子转速为调度变量的涡扇发动机LPV模型,在该模型上增加一个转速-供油量反馈,连同一个PI环节形成闭环回路,实现对LPV模型的改进。仿真结果表明:改进LVP模型可以有效地克服LPV模型误差积累的缺陷,更真实地反映非线性模型的稳态和动态特性。In the light of an error accumulation problem of the LPV（linear parameter varying） model,an improved LPV model was put forward.On the basis of a nonlinear model for a turbofan engine,a LPV model for the turbofan engine was established with its LP rotor rotating speed serving as a scheduling variable.A rotating speed-oil supply quantity feedback was added to the model in question.Together with a PI link,a closed loop circuit was formed,achieving an improvement of the LPV model.The simulation results show that the improved LPV model in question can effectively overcome the error accumulation defect of the LPV model,thus more realistically reflecting the steady and dynamic state characteristics of nonlinear models.

关 键 词：航空发动机 增益调度 线性变参数模型 PID 

分 类 号：V233.7[航空宇航科学与技术—航空宇航推进理论与工程]