摘要
提出了航空发动机的动态非线性Volterra-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.
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 from low to high rotating speed of aeroengine with less parameters that should be identified, and the dynamic simulation error of high and low rotors is less than 1% and the error of temperature exit of high-pressure turbine is less than 3℃. The model is suitable for aeroengine and control system simulation.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2009年第2期465-469,共5页
Journal of Aerospace Power
