Print Email Facebook Twitter Nonlinear Incremental Control for Flexible Aircraft Trajectory Tracking and Load Alleviation Title Nonlinear Incremental Control for Flexible Aircraft Trajectory Tracking and Load Alleviation Author Wang, Xuerui (TU Delft Aerospace Structures & Computational Mechanics) Mkhoyan, T. (TU Delft Aerospace Structures & Computational Mechanics) De Breuker, R. (TU Delft Aerospace Structures & Computational Mechanics) Date 2021 Abstract This paper proposes a nonlinear control architecture for flexible aircraft simultaneous trajectory tracking and load alleviation. By exploiting the control redundancy, the gust and maneuver loads are alleviated without degrading the rigid-body command tracking performance. The proposed control architecture contains four cascaded control loops: position control, flight path control, attitude control, and optimal multi-objective wing control. Since the position kinematics are not influenced by model uncertainties, the nonlinear dynamic inversion control is applied. On the contrary, the flight path dynamics are perturbed by both model uncertainties and atmospheric disturbances; thus the incremental sliding mode control is adopted. Lyapunov-based analyses show that this method can simultaneously reduce the model dependency and the minimum possible gains of conventional sliding mode control methods. Moreover, the attitude dynamics are in the strict-feedback form; thus the incremental backstepping sliding mode control is applied. Furthermore, a novel load reference generator is designed to distinguish the necessary loads for performing maneuvers from the excessive loads. The load references are realized by the inner-loop optimal wing controller, while the excessive loads are naturalized by flaps without influencing the outer-loop tracking performance. The merits of the proposed control architecture are verified by trajectory tracking tasks and gust load alleviation tasks in spatial von K\'arm\'an turbulence fields. To reference this document use: http://resolver.tudelft.nl/uuid:433518dd-b35e-4455-8b7d-58cb4507e34a DOI https://doi.org/10.2514/6.2021-0503 Publisher American Institute of Aeronautics and Astronautics Inc. (AIAA) ISBN 978-1-62410-609-5 Source AIAA Scitech 2021 Forum: 11–15 & 19–21 January 2021, Virtual Event Event AIAA Scitech 2021 Forum, 2021-01-11 → 2021-01-21, Virtual/online event due to COVID-19 , Virtual, Online Bibliographical note Virtual/online event due to COVID-19 Part of collection Institutional Repository Document type conference paper Rights © 2021 Xuerui Wang, T. Mkhoyan, R. De Breuker Files PDF 6.2021_0503.pdf 2.67 MB Close viewer /islandora/object/uuid:433518dd-b35e-4455-8b7d-58cb4507e34a/datastream/OBJ/view