Journal ArticleDOI
Review on electro hydrostatic actuator for flight control
Navatha Alle,Somashekhar S. Hiremath,Singaperumal Makaram,Karunanidhi Subramaniam,Apratim Talukdar +4 more
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In this article, the authors reviewed literature published in the period 1990 to 2015 and available at major technical university libraries or e-journals and examined the advantages, limitations and possible configurations of the EHA.Abstract:
Electro Hydrostatic Actuator (EHA) is an emerging aerospace technology that aims at replacing centralised hydraulic system by a self-contained and localised direct drive actuator system. EHA has become an important part of modern flight control systems due to the increased efficiency, reduced leakages and lower overall weight compared to conventional hydraulic systems. This paper reviews literature (in English language only) published in the period 1990 to 2015 and available at major technical university libraries or e-journals. It examines the advantages, limitations and possible configurations of the EHA. The paper also includes control strategies, reliability and fault tolerant techniques along with the thermal aspects of the EHA system. EHA is a multi-domain system consisting of electrical, mechanical, hydraulic and control system. It is treated as a mechatronic system and review of publications related to multi-disciplinary modelling/simulation approaches have been presented in the paper. The...read more
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Journal ArticleDOI
A review of electromechanical actuators for More/All Electric aircraft systems:
TL;DR: This paper reviews the published application and development of the airborne linear electromechanical actuator and reveals key technologies and research challenges in terms of fault-tolerant motor, high-thrust mechanical transmission, multidisciplinary modelling, thermal management, and thermal analysis.
Journal ArticleDOI
A Review of High-Speed Electro-Hydrostatic Actuator Pumps in Aerospace Applications: Challenges and Solutions
TL;DR: In this article, a review of the current challenges of high-speed EHA pumps is presented, including cavitation, flow and pressure ripples, tilting motion of rotating group and heat problem.
Journal ArticleDOI
An Effective Disturbance-Observer-Based Nonlinear Controller for a Pump-Controlled Hydraulic System
TL;DR: An advanced position controller incorporated with effective disturbance observers (DOs) applied for a pump-controlled hydraulic system is proposed in this article and uncertainties are considered as certainties (nominal terms) and their deviations.
Journal ArticleDOI
Effects of inclined cylinder ports on gaseous cavitation of high-speed electro-hydrostatic actuator pumps: a numerical study
TL;DR: In this article, the rotational speed of EHA pumps is increased to improve their power density, but gaseous cavitation tends to occur in the displacement chambers at high velocities.
Proceedings ArticleDOI
The Theoretical Flow Ripple of an External Gear Pump
TL;DR: In this paper, the theoretical flow ripple of an external gear pump is derived based upon the flow of incompressible fluid across the changing boundaries of a control volume, and the instantaneous length of action within the gear mesh determines the instantaneous flow ripple.
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