University of Bahrain
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Classical and fuzzy sliding mode control for a nonlinear aeroelastic system with unsteady aerodynamic model

Show simple item record Zahra, Ragoub Mohand, Lagha Smain, Dilmi 2020-07-14T18:23:10Z 2020-07-14T18:23:10Z 2020-11-01
dc.identifier.issn 2210-142X
dc.description.abstract This paper proposes a robust solution for the design and stability of nonlinear aeroelastic airfoils of fixed-wing drones that are widely exploited in many fields such as meteorology and surveillance. Therefore, conventional sliding mode and fuzzy sliding mode control algorithms are suggested for the stabilization of a multi-input-multi-output nonlinear aeroelastic model. The aerodynamic lift and moment are expressed based on the Wagner’s function for unsteady aerodynamics, and the flight dynamic model describes the plunge and pitch motions of the aircraft wing section with trailing edge and leading edge control surfaces. The selected two-degree of freedom model that includes aerodynamic and structural nonlinearities interactions, exhibits instability phenomena such as flutter and Limit Cycle Oscillations (LCOs) beyond a critical free-stream velocity. The contribution of this work is to design control algorithms in order to improve the critical flutter speed for the aeroelastic model in which unsteady aerodynamics is introduced. The control laws permit to drive the plunge displacement and pitch angle trajectories to the origin in finite time, and to guarantee a chattering-free system. The obtained results confirm that the established controllers effectively accomplish suppression of LCOs and lead the state trajectories to the origin despite nonlinearities and gust loads. en_US
dc.language.iso en en_US
dc.publisher University of Bahrain en_US
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International *
dc.rights.uri *
dc.subject Nonlinear aeroservoelasticity en_US
dc.subject Sliding mode control en_US
dc.subject Fuzzy logic controller en_US
dc.subject Flutter en_US
dc.subject Limit cycle oscillatory en_US
dc.subject Chattering en_US
dc.subject Unsteady aerodynamic model en_US
dc.subject Wagner’s function en_US
dc.title Classical and fuzzy sliding mode control for a nonlinear aeroelastic system with unsteady aerodynamic model en_US
dc.type Article en_US
dc.volume 9 en_US
dc.issue 6
dc.pagestart 1108 en_US
dc.pageend 1099 en_US
dc.source.title International Journal of Computing and Digital Systems en_US
dc.abbreviatedsourcetitle IJCDS en_US

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