Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Flutter analysis of a hybrid aero-servo-viscoelastic wing in the time domain
Submission Author:
Polliana Martins , DF , Brazil
Co-Authors:
Polliana Martins, Aline Souza de Paula, Sergio Henrique da Silva Carneiro
Presenter: Sergio Henrique da Silva Carneiro
doi://10.26678/ABCM.DINAME2023.DIN2023-0146
Abstract
This work focuses on the construction of a hybrid aeroelastic model in which it is possible to perform dynamical stability analysis in the time domain. The hybrid model is also called aero-servo-viscoelastic and it takes into account the presence of a viscoelastic material that rules the passive control as well a proportional derivative (PD) controller which performs the active approach. These techniques are concomitantly applied to a straight and homogeneous wing with a control surface coupled to the trailing edge. The physical model considers two degrees of freedom, while the aerodynamic model is unsteady and has approximations to inhibit the reduced frequency factor dependence. Since the global investigation is performed in time domain, the frequency and temperature dependent viscoelastic behavior was modeled using the the fractional derivative approximation. In the hybrid model analysis, it is possible to see that the efforts of the derivative control are considerable in this application and the different types of control, when combined, result in a good improvement of the flutter envelope.
Keywords
Aeroelasticity in time domain, fractional derivative model, viscoelasticity, PD Control, Flutter
