基于干扰观测器的飞行器再入姿态广义预测控制
发布时间：2019-05-12 06:22
【摘要】：考虑飞行器模型中的不确定和干扰失配问题,针对再入飞行器提出了一种基于非线性干扰观测器的广义预测控制方法。首先,在姿态子系统中引入虚拟广义预测控制,通过非线性观测器实现对控制器中未知干扰的估计;其次,对姿态角速度子系统利用广义预测控制方法进行实际控制输入设计时,为简化计算,将虚拟控制的导数作为不确定项同未知干扰一起利用非线性干扰观测器进行了估计;最后,基于Lyapunov理论证明了飞行器姿态收敛到期望姿态的有界小邻域内。仿真结果验证了此方法的有效性。
[Abstract]:Considering the uncertainty and disturbance mismatch in aircraft model, a generalized predictive control method based on nonlinear disturbance observer is proposed for reentry aircraft. Firstly, virtual generalized predictive control is introduced into attitude subsystem, and the unknown disturbance in the controller is estimated by nonlinear observer. Secondly, when the attitude angular velocity subsystem is designed by the generalized predictive control method, in order to simplify the calculation, the derivative of the virtual control is estimated by using the nonlinear disturbance observer together with the unknown disturbance. Finally, based on Lyapunov theory, it is proved that the attitude of the aircraft converges to the bounded small neighborhood of the desired attitude. Simulation results show that this method is effective.
【作者单位】： 中国运载火箭技术研究院研究发展中心;
【分类号】：V249.1
本文编号：2475176
[Abstract]:Considering the uncertainty and disturbance mismatch in aircraft model, a generalized predictive control method based on nonlinear disturbance observer is proposed for reentry aircraft. Firstly, virtual generalized predictive control is introduced into attitude subsystem, and the unknown disturbance in the controller is estimated by nonlinear observer. Secondly, when the attitude angular velocity subsystem is designed by the generalized predictive control method, in order to simplify the calculation, the derivative of the virtual control is estimated by using the nonlinear disturbance observer together with the unknown disturbance. Finally, based on Lyapunov theory, it is proved that the attitude of the aircraft converges to the bounded small neighborhood of the desired attitude. Simulation results show that this method is effective.
【作者单位】： 中国运载火箭技术研究院研究发展中心;
【分类号】：V249.1
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