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DINAME2019
DINAME2019
Closed-loop system identification of an unmanned aerial system (UAS) with flexible wings using subspaces methods
Submission Author:
Raphaela Carvalho Machado , SP
Co-Authors:
Raphaela Carvalho Machado, Luiz Carlos Góes, Marcelo Sousa
Presenter: Raphaela Carvalho Machado
doi://10.26678/ABCM.DINAME2019.DIN2019-0205
Abstract
This article presents a methodology for closed-loop system identification applied to an unmanned aerial system (UAS) with flexible wings using subspace methods. The investigated UAS is a small aircraft that has a total weight of 8.89 kg with a wing of area 0.8460 m$^2$ and span of 4 m. Its structural flexibility is a consequence of the composite material used to manufacture the wings besides the high aspect ratio about 18.91. Simulated data of a complete nonlinear rigid-body model coupled with two wing bending modes was developed and are used as input to the identification algorithm. The identification method is based on subspace techniques which applying algebra tools, e.g., singular value decomposition and orthogonal and oblique projections to solve the least-squares problem to determine the system matrices. In this work are used simulated data in order to validate the identification methodology presented and to obtain preliminary numerical results. The numerical results generated good models in state-space representation for the simulated aircraft, which may be evaluated to define the best control system strategy. A similar procedure is going to be performed later on experimental data collected from aircraft's flight-test campaigns.
Keywords
System Identification, aerial vehicle, flexible wings, subspace methods
