基于最小状态法的气动力有理函数拟合精度影响因素研究

摘要

针对气动伺服弹性状态空间建模的需求，介绍了非定常气动力有理函数拟合常用的最小状态法，并以某大型飞机为例，分析了不同的滞后根取值、个数及拟合约束对最小状态法拟合精度的影响，得出了拟合参数选取的一般规律，为气动伺服弹性状态空间建模打下基础。%The research aims at the requirements of aeroservoelasticity(ASE) state space modeling. The minimum state(MS) method, which is commonly used in unsteady aerodynamic approximation was introduced, and the selecting rules of approximation parameters were obtained by analyzing the effects of lag roots' values, numbers and constrains using a jumbo aircraft, which lays the foundation for ASE state space modeling.