Robust active suppression for body-freedom flutter of a flying-wing unmanned aerial vehicle |
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| Authors: | Qitong Zou Xusheng Mu Hongkun Li Rui Huang Haiyan Hu |
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| Institution: | 1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People''s Republic of China;2. College of Air Traffic Management, Civil Aviation University of China, Tianjin 300300, People''s Republic of China;1. Key Laboratory of Dependable Service Computing in Cyber Physical Society of Ministry of Education, Chongqing University, Chongqing 400044, China;2. College of Automation, Chongqing University, Chongqing 400044, China;3. Public Security Business Group of Gosuncn Technology Group Co.,Ltd., China, 510530;1. Systems Engineering Department, KFUPM, Dhahran 31261, Saudi Arabia;2. School of Automation, Beijing Institute of Technology, Beijing, China;1. School of Aeronautics, Northwestern Polytechnical University, 710072 Xi''an, China;2. State Key Laboratory for Northwestern Strength and Vibration of Mechanical Structures, Shaanxi Key Laboratory of Environment and Control for Flight Vehicle, School of Aerospace, Xi''an Jiaotong University, 710049 Xi''an, China;3. Mechanics and Environment Research Center, Xi''an Aerospace Propulsion Institute, 710100 Xi''an, China |
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| Abstract: | 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. |
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