Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
Influence and Suppression of Harmonic Components in Operational Modal Analysis of an Unmanned Aircraft Vehicle
Submission Author:
David Fernando Castillo Zuñiga , SP
Co-Authors:
David Fernando Castillo Zuñiga, Clécio Fischer, Luiz Carlos Góes
Presenter: David Fernando Castillo Zuñiga
doi://10.26678/ABCM.CONEM2018.CON18-1133
Abstract
Modal Operational Analysis (OMA) is a methodology to estimate the modal parameters of a structure using only dynamic response data, without assuming the knowledge of the excitation forces. The excitation chosen must be able to be represented by a white noise loading. However, an important aspect in the case of OMA is the presence of harmonics added to the random excitations load, mainly due to the associated rotary systems. Due to the presence of harmonic excitation, the process of identification of the modal parameters can lose its robustness and can provide an unsatisfactory parameters identification. In this work is evaluated a presence de harmonic components in the OMA of the Vector-P Unmanned Aerial Vehicle due to a 2-stroke reverse rotation gasoline engine. The OMA technique used is the Frequency Domain Decomposition method (FDD). The Vector-P is instrumented with a set of accelerometers on the wing and the horizontal stabilizer. The harmonics associated with motor operation are high frequency; the engine operates in a range of 1000 - 2500 rpm. In this work OMA methodology is applied treating the harmonics as operating or artificial modes.
Keywords
Operational Modal Analysis, Harmonic Component, Harmonic Suppression, Unmanned aerial vehicle, Aeroelasticity
