Rafael M. Bertolin, Antonio B. Guimaraes Neto, Guilherme C. Barbosa, Juliano A. Paulino, Fl´avio J. Silvestre

DOI Number: N/A

Conference number: IFASD-2019-012

There are many challenges related to the design and operation of flexible aircraft. Flight control law design for improving handling qualities is one of them because the major problem in the design of controllers then concerns aeroservoelastic stability. To deal with this difficulty, methodologies for flight control law design considering the aeroelastic dynamics of the aircraft are being pursued. In this paper, an output-feedback-based stability augmentation system is proposed and designed to improve the handling qualities of a flexible aircraft and to increase the structural damping of some of its aeroelastic modes. The design is based on the projective control technique, which allows preserving in the closed-loop system the eigenstructure of certain modes of interest whose dynamic characteristics stem from an optimal state feedback solution. The X-HALE flexible aircraft is considered. Numerical studies by means of nonlinear simulations allow testing and confirming the effectiveness of the proposed controller.

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In Categories: Control of Very Flexible Aircraft, IFASD 2019
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