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针对飞机大迎角机动特殊的气动特性以及传统非线性动态逆控制器存在的缺陷,提出了一种基于神经网络的非线性动态逆大迎角飞行控制律设计方法,该方法利用非线性动态逆与奇异摄动理论,设计了基本的大迎角飞行控制律;针对动态逆方法对建模精度的高度依赖问题,将动态逆方法与神经网络相结合,采用神经网络对逆误差进行在线补偿;基于具有大迎角条件下气动特性的六自由度非线性飞机模型进行了仿真验证;仿真结果表明,所设计的控制律具有良好的大迎角飞行控制效果,飞机迎角响应迅速,实现了“眼镜蛇”机动控制,对于模型的不确定性,NN-NDI控制方法依然具有良好的大迎角控制性能。
Aiming at the special aerodynamic characteristics of aircraft maneuvering at high angles of attack and the defects of the traditional nonlinear dynamic inverse controllers, a nonlinear dynamic inverse large angle of attack flight control law design method based on neural network is proposed. The method uses nonlinear dynamic inverse And the singular perturbation theory, the basic control law of the flight at high angles of attack is designed. Aiming at the problem that the dynamic inverse method is highly dependent on the modeling accuracy, the dynamic inverse method is combined with the neural network to compensate the inverse error online. The simulation results show that the proposed control law has a good effect of flight control at high angle of attack and the response of aircraft attack angle is rapid and the “Cobra” motor control, NN-NDI control method still has a good control of the high-angle of attack for the uncertainty of the model.