A novel electro-hydrostatic asymmetric actuator with double displacement hydraulic pump
A novel electro-hydrostatic asymmetric actuator with double displacement hydraulic pump
- Author(s): Huawang Sun ; Yaoxing Shang ; Shuai Wu ; Zongxia Jiao
- DOI: 10.1049/cp.2018.0116
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- Author(s): Huawang Sun ; Yaoxing Shang ; Shuai Wu ; Zongxia Jiao Source: CSAA/IET International Conference on Aircraft Utility Systems (AUS 2018), 2018 page (5 pp.)
- Conference: CSAA/IET International Conference on Aircraft Utility Systems (AUS 2018)
- DOI: 10.1049/cp.2018.0116
- ISBN: 978-1-78561-791-1
- Location: Guiyang, China
- Conference date: 19-22 June 2018
- Format: PDF
Due to asymmetry of the piston effective area on both sides of the single rod cylinder, its performances are limited compared to the double rod cylinder. In this paper, a novel electro-hydrostatic asymmetric actuator is proposed, in which double displacement pump is used to control the single rod actuator to improve system properties. The double displacement pump possesses two states, large displacement and small displacement, which respectively control rod less chamber and rod chamber. Mathematical and simulation models are constructed to analyze internal parameters of system. By analyzing force load curve, in case of no increase in maximum torque, rotating speed is reducing, that means power rating is lower. Furthermore amplitude-frequency and phase-frequency characteristics are enhanced. Effectiveness and availability of the design is authenticated.
Inspec keywords: actuators; valves; position control; pistons; rods (structures); hydraulic systems; control system synthesis; electrohydraulic control equipment; pumps
Subjects: Fluid mechanics and aerodynamics (mechanical engineering); Spatial variables control; Control system analysis and synthesis methods; Mechanical components
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