PARAMETER IDENTIFICATION BY UPDATING THE STRUCTURAL MODEL OF A UAV WITH FLEXIBLE WING

Abstract

Copyright © (2022) by International Council of Aeronautical Sciences (ICAS) All rights reserved.There are some approaches for updating models to later model the aeroelastic behavior, and in this work, the Modal Assurance Criterion (MAC) helps identify the parameters. The objective of this work was to update the finite element model for the EOLO aircraft. We used the modal shapes derived from Ground Test Vibration (GVT) as a basis of comparison for the MAC, in addition to using the Nastran software to optimize the stiffness properties of the analytical model of the EOLO aircraft. It noted that the natural frequencies of the updated model approached the GVT data and the cross-correlation improved, but the correlation was far from ideal. Therefore, the model was updated and improved over the initial model.

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