摘要
结合当前大型民用飞机的非线性耦合性强、气动参数复杂、建模过程长的特点,研究给出了一种基于输入输出分析的快速建模方法。利用飞行品质中的低阶等效系统概念,在非线性建模完成后,利用飞机的时域或频域分析获得适合飞机基本模态的低阶模型,利用该建模结果导出飞机线性方程。若获得的失配参数小,则结果的可信度较高。线性系统和非线性系统的算例表明该方法是可行的,具有应用性。
Considering the characteristics of strong nonlinear coupling,complex aerodynamic parameters and long modeling process of the current large civil aircraft,a new method of fast modeling based on input and output analysis was proposed.The method employs the concept of low-order equivalent system used in flying qualities evaluation and gets the low-order model of the airplane through its time-domain or frequency-domain analysis,and then the linear equations of the airplane can be deduced.If the parameter mismatch is small,the results are of high reliability.Two applications in both linear system and nonlinear system prove its feasibility.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2011年第8期1545-1548,共4页
Journal of System Simulation
关键词
气动参数
快速建模
低阶等效系统
线性方程
aerodynamic parameters
fast modeling
low-order equivalent system
linear equations
