Design and Simulation of Electro-hydrostatic Actuator with a Built-in Power Regulator  

作　　者：Kang Rongjie Jiao Zongxia Wang Shaoping Chen Lisha 

机构地区：[1]School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

出　　处：《Chinese Journal of Aeronautics》2009年第6期700-706,共7页中国航空学报（英文版）

基　　金：National Natural Science Foundation for Distinguished Young Scholars of China （50825502）

摘　　要：The electro-hydrostatic actuator （EHA） is a kind of power-by-wire （PBW） actuator that converts the electrical power into localized hydraulic power for flight control. By removing the central hydraulic power supply together with hydraulic pipes, an EHA＇s reliability and efficiency are greatly improved but its frequency width and stiffness decreased. To overcome the drawback, this article proposes a novel structure of EHA associated with a power regulator. Composed of a high-pressure accumulator and a proportional valve, it can store and harness the hydraulic power flexibly according to the changing control requirements. The concept of transferred volume is put forward to estimate the capability of the power regulator. The actuator output position can be kept fixed with a hydraulic lock. The compounded control is specially developed to ensure the actuator system to operate in a correct manner. The simulation results indicate that the new-brand actuator results in efficient expanding of the system frequency width with an optimal power supply.The electro-hydrostatic actuator （EHA） is a kind of power-by-wire （PBW） actuator that converts the electrical power into localized hydraulic power for flight control. By removing the central hydraulic power supply together with hydraulic pipes, an EHA＇s reliability and efficiency are greatly improved but its frequency width and stiffness decreased. To overcome the drawback, this article proposes a novel structure of EHA associated with a power regulator. Composed of a high-pressure accumulator and a proportional valve, it can store and harness the hydraulic power flexibly according to the changing control requirements. The concept of transferred volume is put forward to estimate the capability of the power regulator. The actuator output position can be kept fixed with a hydraulic lock. The compounded control is specially developed to ensure the actuator system to operate in a correct manner. The simulation results indicate that the new-brand actuator results in efficient expanding of the system frequency width with an optimal power supply.

关 键 词：electro-hydrostatic actuator （EHA） power regulator transferred volume hydraulic lock frequency width STIFFNESS 

分 类 号：TM44[电气工程—电器] TP391.9[自动化与计算机技术—计算机应用技术]