高超声速飞行器超螺旋滑模自适应控制

Super-Twisting Sliding Mode Adaptive Control of Hypersonic Vehicle

针对具有强耦合性、严重非线性等特性的高超声速飞行器控制问题,提出了一种改进的自适应二阶滑模控制方法。首先,在高超声速飞行器纵向模型中加入不确定因素,建立了具有参数不确定性、模型不确定性以及干扰的控制模型;其次,在所建立模型的基础上,利用类二次型Lyapunov函数设计了基于super-twisting算法的二阶滑模自适应控制器;最后,仿真结果表明,对具有未知上界不确定性的系统,该方法设计的控制器较普通二阶滑模控制器,有更好的跟踪效果以及鲁棒性。

Aiming at the problem of hypersonic vehicle control with strong coupling and severe nonlinearity an improved adaptive second-order sliding mode control method is proposed.Firstly uncertain factors are added to the longitudinal model of hypersonic vehicle and a control model with parameter uncertainties model uncertainties and interferences is established.Secondly based on the established model an adaptive second-order sliding mode controller based on super-twisting algorithm is designed by using quadratic Lyapunov function.Finally the simulation results show that:Compared with the common second-order sliding mode controller the controller designed in this method has better tracking effect and robustness for systems with unknown upper bound uncertainty.