Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A study of an Electro-Hydrostatic Actuator for aircraft application
Submission Author:
Dimitri Oliveira e Silva , PA
Co-Authors:
Dimitri Oliveira e Silva, Marcos Paulo Nostrani, Gierri Waltrich, Victor Juliano De Negri
Presenter: Marcos Paulo Nostrani
doi://10.26678/ABCM.COBEM2023.COB2023-1628
Abstract
One of the main characteristics of hydraulic systems is their high power density, which makes this technology one of the most used in mobile applications, due to its ability to perform high forces and have relatively low occupied volume. For aeronautical systems, the use of servo hydraulic actuators began in the 1950s when the technology began to be applied as an auxiliary source of power to assist the pilot in controlling the aircraft. The technological evolution of the aircraft required the improvement of the hydraulic systems and their components, to become more robust and reliable. The concepts of More Electric Aircraft and Power-by-Wire have been driven in recent decades by the evolution of electrical components of drivers and electric motors, used to control decentralized solutions such as electro-hydrostatic actuators. In this type of solution, the energy is carried by wire, and the hydraulic system is confined to a circuit close to the cylinder. Together, the concepts aim to reduce the number of hydraulic lines, reduce weight, the risk of leakage, maintenance time, and the cost of the aircraft's life cycle and also aim to improve the energy efficiency of the system. In this paper, a design method for hydraulic positioning systems is used to size an electro-hydrostatic actuator aiming at the aircraft application requirements. Based on the design requirements, different EHA configurations combining different pump volumetric displacement sizes and angular velocity ranges are used to access the characteristics of each configuration to obtain their respective advantages and disadvantages. Based on the design requirements, different EHA configurations that combine different pump volumetric displacement sizes and angular velocity ranges are used to assess the characteristics of each configuration to obtain their respective advantages and disadvantages. An electro-hydrostatic actuator model is proposed and used to simulate the proposed configurations, in order to compare each one under different working conditions to evaluate its dynamics and energy consumption. Results are based on information from manufacturers' datasheets used to configure system components. As the results are based on real component data, it is possible to obtain reliable information about the behavior and energy consumption of the system. This paper aims to contribute to the study and development of hydraulic systems and the use of electro-hydrostatic actuators following the global trend of electrification of systems.
Keywords
Electro-hydrostatic actuators, Actuator sizing, Aircraft control surfaces
