Flying-wing unmanned aerial vehicles have received extensive attention over the past decade because of their excellent aerodynamic and stealth performance. However, the aeroelastic interaction problems among unsteady aerodynamics, flight dynamics, and structural dynamics, such as the body-freedom flutter, are still open. This paper presents the study of a robust control scheme for active body-freedom flutter suppression of a flexible flying-wing unmanned aerial vehicle. The control objective is to expand the boundary of body-freedom flutter and to enhance the control robustness to external unknown disturbance simultaneously. The paper begins with the modeling procedure of a parameter-varying aeroservoelastic plant for the design of control law. Then, it presents how to synthesize a robust controller so as to suppress the flutter instability for a wide flight range of dynamic pressures. Afterwards, the paper shows how to analyze the flutter stability of the closed-loop system and the robustness of the controller, respectively. The numerical results demonstrate that the proposed robust controller can not only expand the flutter boundary of the unmanned aerial vehicle by 30%, but also exhibit the strong robustness to external disturbance.

在过去的十年中，飞翼无人机因其出色的空气动力学性能和隐身性能而受到广泛关注。但是，不稳定的空气动力学，飞行动力学和结构动力学之间的气动弹性相互作用问题（如自由身颤动）仍然存在。本文提出了一种鲁棒控制方案的研究，该方案​​用于抑制柔性飞行翼无人机的主动自由身颤动。控制目标是扩大身体自由颤动的边界，并同时增强对外部未知干扰的控制鲁棒性。本文从参数可变的航空弹性工厂的建模过程开始，以设计控制律。然后，它介绍了如何综合一个鲁棒的控制器，以抑制大范围动态压力飞行中的颤振不稳定性。然后，本文展示了如何分别分析闭环系统的颤振稳定性和控制器的鲁棒性。数值结果表明，所提出的鲁棒控制器不仅可以将无人机的颤振边界扩大30％，而且还具有较强的鲁棒性。