针对高超声速飞行器纵向模型存在的不确定性与外界干扰问题,基于终端滑模控制理论,设计了带有滑模干扰观测器的非线性动态逆控制器。对飞行器的纵向运动模型进行反馈线性化,实现高度与速度通道的解耦,用极点配置方法设计非线性动态逆控制器。将模型参数不确定性和外界干扰视为“等效扰动”,设计滑模干扰观测器估计系统的等效扰动,将其反馈到动态逆控制器进行补偿。仿真结果表明,该控制器能够快速稳定地跟踪指令信号,而且在干扰存在时具有较强的鲁棒性,满足高超声速飞行控制要求。

Aiming at the uncertainty and external disturbance of the longitudinal model of hypersonic vehicles, a nonlinear dynamic inverse controller with sliding mode disturbance observer is designed based on the terminal sliding mode control theory.Firstly, feedback linearization is made to the longitudinal motion model of the aircraft to realize the decoupling of the height and velocity channels.The nonlinear dynamic inverse controller is designed by using the pole configuration method.The model parameter uncertainty and external disturbance are regarded as “equivalent disturbance”.The sliding mode disturbance observer is designed to estimate the equivalent disturbance of the system, and it is fed back to the dynamic inverse controller for compensation.The simulation results show that the controller can track the command signal quickly and stably, has strong robustness in the presence of interference, and can meet the requirements of hypersonic flight control.