Pedro J. González, Antônio B. Guimarães Neto, Guilherme Chaves Barbosa, Rafael M. Bertolin, Fl´avio J. Silvestre, Carlos E. S. Cesnik

DOI Number: N/A

Conference number: IFASD-2017-077

Highly-flexible aircrafts present high-aspect-ratio wings that introduce nonlinearities into the flight dynamics and make more complex models and control methods necessary. In this paper, a loop separation concept is applied to the X-HALE aircraft, giving rise to a control system comprising an inner-loop capable of controlling the shape of the aircraft while keeping the plant stable, and an outer-loop capable of controlling velocity, altitude, bank angle and sideslip angle. The outer-loop has a decoupled structure for longitudinal and for the lateral-directional axes. The matrices of the compensators were obtained using non-smooth optimization. Gain-scheduling techniques are implemented to bypass stability problems arising from changes in the plant with flight speed. Nonlinear simulations show promising results for implementation on the real aircraft.

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In Categories: 1.Events, Aeroservoelasticity, IFASD 2017
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