近空间可变翼飞行器小翼切换滑模反步控制

针对近空间可变翼飞行器在小翼切换过程中存在参数不确定性的问题,设计了滑模控制和反步法相结合的控制方法以保证飞行器的跟踪性能。首先研究了近空间可变翼飞行器的纵向运动模型,在此基础上设计了速度和高度的反步控制器,同时采用动态面控制方法消除微分膨胀问题,然后结合滑模控制以增强控制器的跟踪性能,最后基于Lyapunov稳定性理论证明了系统的稳定性。仿真结果表明,在参数不确定性时滑模反步控制器能保证系统的稳定性和跟踪性能。

Sliding mode backstepping control for near space morphing vehicle winglet switching

Considering the influence of uncertain parameters,a sliding mode controller based on backstepping is designed for trajectory tracking control problem of near space morphing vehicle in the process of Winglet switching.Firstly,the longitudinal motion model of near space morphing vehicle is studied,and then the backstepping controller for both speed and height is designed.At the same time,a dynamic surface control strategy is adopted to eliminate the differential explosion,then the sliding mode control is combined to improve the tracking performance of the controller.Based on the Lyapunov stability theory,the stability of the above system is proved.The simulation results show that the sliding mode controller based on backstepping can guarantee system stability and tracking performance in the case of uncertain parameters.