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Aerospace 2018, 5(3), 86; https://doi.org/10.3390/aerospace5030086

Adaptive Feedforward Control for Gust-Induced Aeroelastic Vibrations

1
China Academy of Aerospace Aerodynamics, Beijing 100074, China
2
Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 7 July 2018 / Revised: 30 July 2018 / Accepted: 3 August 2018 / Published: 10 August 2018
(This article belongs to the Special Issue Aeroelasticity)
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Abstract

This paper demonstrates the implementation of an adaptive feedforward controller to reduce structural vibrations on a wing typical section. The aeroelastic model includes a structural nonlinearity, which is modelled in a polynomial form. Aeroelastic vibrations are induced by several gusts and atmospheric turbulence, including the discrete “one-minus-cosine” and a notably good approximation in the time-domain to the von Kármán spectrum. The control strategy based on the adaptive feedforward controller has several advantages compared to the standard feedback controller. The controller gains, which are updated in real-time during the gust encounter, are found solving a minimization problem using the finite impulse responses as basis functions. To make progress with the application in aeroelasticity, a single-input single-output controller is designed measuring the wing torsional deformation. For both deterministic and random atmospheric shapes, the controller was found successful in alleviating the aeroelastic vibrations. The impact of the control action on the unmeasured structural modes was found minimal. View Full-Text
Keywords: adaptive feedforward control; nonlinear aeroelasticity; gust loads alleviation; structural vibrations adaptive feedforward control; nonlinear aeroelasticity; gust loads alleviation; structural vibrations
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wang, Y.; Da Ronch, A.; Ghandchi Tehrani, M. Adaptive Feedforward Control for Gust-Induced Aeroelastic Vibrations. Aerospace 2018, 5, 86.

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