Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
On the use of PZT transducers for active flutter suppression
Submission Author:
Frederico Ribeiro , SP
Co-Authors:
Frederico Ribeiro, Renan Sanches Geronel, Carlos De Marqui Junior, Douglas Bueno
Presenter: Frederico Ribeiro
doi://10.26678/ABCM.COBEM2021.COB2021-2324
Abstract
Flutter suppression is an important and most studied subject of aeroelasticity, because of the potentially catastrophic characteristics of this aeroelastic phenomenon, motivating continuous technological development on mitigating this undesirable instability. Due to advances of applied construction materials, such as reduction of the weight of aircraft, and a more flexible structure, the active controllers are strategies used not only to perform flutter suppression, but also allow the aircraft to operate on a larger flight envelope (which is composed by a higher height and velocities). In addition, these strategies are also desirable for unmanned aerial vehicles (UAV), operating in high-altitude long-endurance (HALE), which are very flexible vehicles designed to accomplish long-time flights without touching the ground. Several types of actuators can be employed for flutter suppression, for instance, the piezoelectric actuators as a convenient alternative, since does not require hydraulics systems to operate and these actuators class are briefly explored in the literature. The interest of this paper is to design a controller for an aeroelastic system using a piezoelectric actuator on a typical section model, investigating the actuator performance and limits. The aeroelastic model to be used is the typical section with 3 degrees of freedom on a computational environment, using the Theodorsen unsteady aerodynamic loads, obtained in the time domain through rational function approximations (RFA). For the active suppression, an output feedback control is obtained using the linear matrix inequalities (LMI) technique, with a PZT stack actuator. As expected results are The evaluation of the feasibility of piezoelectric stack for flutter suppression, the electric voltage, and power required to control the system are the expected results for the numerical simulation, preserving the actuator limits, the performance of the output feedback control for the time domain aeroelastic system (which contains non-measurable states, the lag states). Therefore obtaining the control laws, and the PZT actuator operation constraints, flutter suppression can be achieved, improving the development and performance of the aeroelastic systems.
Keywords
Aeroelasticity, control, Piezoelectric, Linear Matrix Inequalities
