关键词: 高超声速变形飞行器, 姿态控制, 有限时间控制, 滑模控制, 切换事件触发策略, 动态事件触发策略

Abstract:

This paper proposes a novel event-triggered fast finite time sliding mode control for the hypersonic vehicle with frequent actuator deflection in the morphing phase. The original model of the hypersonic morphing vehicle is transformed into the control-oriented model， which is employed in the controller design. The fast finite time control theory is adopted to develop a control system for the hypersonic morphing phase. The switching dynamic event-triggering mechanism is introduced to reduce the frequency of actuator deflection. Meanwhile， the possible performance loss is fully considered in the procedure. The Lyapunov theory is utilized to prove the stability of the closed-loop system and the convergence of the tracking error. Compared with conventional finite-time control methods， fast finite-time control enhances the convergence rate when the system state is far from the equilibrium point. Furthermore， the event-triggering mechanism effectively reduces the frequency of actuating the actuator without obvious performance loss. Simulation verifies the effectiveness and excellent performance of the controller proposed.

Key words: hypersonic morphing vehicle, attitude control, finite time control, sliding mode control, switching event-triggering mechanism, dynamic event-triggering mechanism