TY - GEN
T1 - Simulation and Analysis of Dynamic Stiffness of Electro-hydrostatic Actuators
AU - Jiang, Chaofan
AU - Shang, Yaoxing
AU - Yu, Tian
AU - Li, Mingyang
AU - Wu, Shuai
AU - Liu, Zhicheng
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - With the development of multi-electrochemical aircraft, the application of electro-hydrostatic actuators(EHA) in aircraft actuator system is increasing. The dynamic stiffness of the actuator has a non-negligible effect on the fluttering characteristics of the rudder surface. So it is necessary to study the dynamic stiffness of EHA. In this research, a method for calculating the dynamic stiffness of EHA is proposed. The mathematical model of EHA is established. The bulk modulus of hydraulic oil affected by gas content and pressure is added to the model. Build the simulation model in Simulink. The dynamic stiffness of EHA is simulated in frequency domain. Analyze the simulation results. The EHA dynamic stiffness decreases with the increase of hydraulic oil gas content in the whole frequency range. The trough frequency of dynamic stiffness amplitude decreases with the increase of hydraulic oil gas content. The EHA dynamic stiffness decreases with the increase of pump leakage coefficient in low frequency band. Therefore, in order to improve the dynamic stiffness of EHA, the hydraulic oil gas content and the piston pump leakage coefficient should be reduced.
AB - With the development of multi-electrochemical aircraft, the application of electro-hydrostatic actuators(EHA) in aircraft actuator system is increasing. The dynamic stiffness of the actuator has a non-negligible effect on the fluttering characteristics of the rudder surface. So it is necessary to study the dynamic stiffness of EHA. In this research, a method for calculating the dynamic stiffness of EHA is proposed. The mathematical model of EHA is established. The bulk modulus of hydraulic oil affected by gas content and pressure is added to the model. Build the simulation model in Simulink. The dynamic stiffness of EHA is simulated in frequency domain. Analyze the simulation results. The EHA dynamic stiffness decreases with the increase of hydraulic oil gas content in the whole frequency range. The trough frequency of dynamic stiffness amplitude decreases with the increase of hydraulic oil gas content. The EHA dynamic stiffness decreases with the increase of pump leakage coefficient in low frequency band. Therefore, in order to improve the dynamic stiffness of EHA, the hydraulic oil gas content and the piston pump leakage coefficient should be reduced.
KW - bulk modulus of hydraulic oil
KW - dynamic stiffness
KW - electro-hydrostatic actuators
KW - leakage
UR - https://www.scopus.com/pages/publications/85197547793
U2 - 10.1109/FPM57590.2023.10565423
DO - 10.1109/FPM57590.2023.10565423
M3 - 会议稿件
AN - SCOPUS:85197547793
T3 - 2023 9th International Conference on Fluid Power and Mechatronics, FPM 2023
BT - 2023 9th International Conference on Fluid Power and Mechatronics, FPM 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 9th International Conference on Fluid Power and Mechatronics, FPM 2023
Y2 - 18 August 2023 through 21 August 2023
ER -