高超声速飞行器自适应高阶终端滑模控制

针对高超声速飞行器的纵向运动模型,研究了飞行器输出跟踪控制问题,提出了一种将动态逆方法与高阶终端滑模控制相结合的鲁棒自适应控制方法.首先,利用反馈线性化方法对高超声速飞行器纵向模型输入输出线性化;通过设计具有全局鲁棒性的终端滑模面,提高系统的输出收敛速度;同时,采用自适应高阶滑模控制律,在不确定上界未知条件下对其进行自适应估计,从而实现控制器增益的实时在线调整,减少系统抖振;最后,基于Lyapunov理论证明了此控制策略可以保证闭环系统稳定.仿真结果表明,所设计的控制器能够实现高超声速飞行器纵向爬升机动中速度和高度的稳定跟踪控制.

Adaptive High-Order Terminal Sliding Mode Control for Hypersonic Flight Vehicle

A robust control strategy combining adaptive high order terminal sliding mode with dynamic inversion wasdesigned for the uncertain longitudinal dynamics of hypersonic vehicles about the output tracking problem. The feedbacklinearization method was adopted in this paper to linearize the input and output of a hypersonic vehicle longitudinalmodel. Then,the terminal sliding surface which possessed the global robustness was designed to improve theconvergence rate of the output vector. Afterwards,the gain of the controller achieved real-time online adjustment bythe adaptive high order sliding mode control strategy,through which the chattering was reduced. Finally,the finitetimestability of the closed-loop system was guaranteed based on the Lyapunov theory. Simulation results show thatthe designed controller is effective in climbing maneuvers of velocity and altitude reference commands respectively.