Closed-loop system identification of a large flexible aircraft using subspace methods

Resumo

© 31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018. All rights reserved.This work presents a methodology for system identification of a large flexible aircraft operating in closed-loop. The feedback in some cases is necessary because the system in open-loop is unstable or because a controller, known or not, is present on system and is not possible to removed it. The synthetic data of a nonlinear dynamic to the aircraft considering three symmetric and two anti-symmetric flexible modes are used in the identification algorithm. The identification algorithm is a non iterative subspace method well applied for both open and closed-loop data. The preliminary results suggest a representative model for the aircraft, obtaining the state-space matrices that are of very interest and used for control system analysis and design.

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