基于Volterra-Laguerre扩展模型的发动机加速过程辨识

提出了航空发动机的动态非线性Voherra-Laguerre扩展模型的辨识建模方法.应用Laguerre序列简化线性系统的原理,将Volterra级数模型拓展为Volterra-Laguerre扩展模型,该模型较传统Volterra级数模型减少了辨识量,提高了辨识速度.采用航空发动机地面试车数据辨识建立了其加速过程非线性Volt-erra-Laguerre扩展模型,通过递推最小二乘法辨识了模型参数.仿真结果表明,模型精度高,高低压转子相对转速误差均小于1%,涡轮后燃气温度误差小于3℃,满足发动机控制仿真的需要.

Dynamic acceleration process identification for turbofan engine using Volterra-Laguerre expansion model

The problem of modeling the nonlinear dynamic respondence of aeroengine was studied based on the volterra-laguerre expansion.The structure of Volterra-Laguerre expansion was described and the identification arithmetic of the volterra-laguerre progression model of aeroengine was proposed using the theory of laguerre progression.The comparison between the result of volterra model,the volterra-laguerre expansion and the true shows that the volterra-laguerre expansion can better describe the dynamic process fro...