不稳定飞机气动参数辨识的一种实用方法

地是飞行器气动参数辨识最广泛采用的一种方法。但对于气动高度不稳定的飞机，辨识算法往往因状态方程组和灵敏度方程组积分发散而无法进行。为克服这一数值困难，将方程解耦技术引入输出误差法，发展了高度不稳定飞机气动参数辨识的一种实用方法－－基于方程解耦的误差法。并对某鸭式布局飞机的纵向劝仿真数据进行了辨识仿真计算，计算结果证实了所述方法的有效性。

A practical method of aerodynamic parameter identification for unstable airplane

Output error method is one of the most widely applied methods in the region of aerodynamic parameter identification for aircraft. However, for highly aerodynamic unstable airplane, the identification algorithm can not usually be carried through due to divergence of the state equation and the sensitivity equation integration. In order to overcome the numerical difficulty, a practical method the output error method based on equation decoupling is developed by introducing the equation decoupling technique into the output error method. Equation decoupling can change the stability of the system. Even in the case that the decoupled system is still unstable, it can effectively prevent the rapid divergence of the state equation integration. As an example, the aerodynamic parameters are identified from simulation data of a longitudinal maneuver for some canard airplane. The sample validates the developed method.