Results 61 to 70 of about 534 (128)

Redundant Digital Hydraulic Actuators for Flight Control Surfaces [PDF]

The aircraft industry is continually driven to improve energy efficiency in response to environmental concerns and cost reduction. Among solutions available in the field, hydraulics is commonly chosen to deliver crucial functions for its known ...
de Abreu Burgos Gonçalves, Tulio, De Negri, Victor Juliano, Dell'Amico, Alessandro, Krus, Petter, Nostrani, Marcos Paulo, Oliveira e Silva, Dimitri, Simões Lopes Junior, Rodrigo   +6 more
core   +2 more sources

Advanced Development Projects for Constellation From The Next Generation Launch Technology Program Elements [PDF]

When United States President George W. Bush announced the Vision for Space Exploration in January 2004, twelve propulsion and launch system projects were being pursued in the Next Generation Launch Technology (NGLT) Program.
Huebner, Lawrence D., Saiyed, Naseem H., Swith, Marion Shayne   +2 more
core   +1 more source

Electro-Hydrostatic Actuator Fault Detection and Diagnosis [PDF]

, 2013
As a compact, robust, and reliable power distribution method, hydraulic systems have been used for flight surface control for decades. Electro-hydrostatic Actuator (EHA) is increasingly replacing the conventional valve-controlled system for better ...
SONG, YU
core  

Preliminary Investigation on Battery Sizing Investigation for Thrust Vector Control on Ares I and Ares V Launch Vehicles [PDF]

An investigation into the merits of battery powered Electro Hydrostatic Actuation (EHA) for Thrust Vector Control (TVC) of the Ares I and Ares V launch vehicles is described.
Miller, Thomas B.
core   +1 more source

Fractional-Order Anteater Foraging Optimization Algorithm for Compact Layout Design of Electro-Hydrostatic Actuator Controllers

Fractal and Fractional
The development of More Electric Aircraft (MEA) necessitates that Electro-Hydrostatic Actuator (EHA) controllers achieve exceptional power density within rigorously constrained volumes.
Shuai Cao, Wei Xu, Weibo Li, Kangzheng Huang, Xiaoqing Deng   +4 more
doaj   +1 more source

Systems study for an Integrated Digital-Electric Aircraft (IDEA) [PDF]

The results of the Integrated Digital/Electric Aircraft (IDEA) Study are presented. Airplanes with advanced systems were, defined and evaluated, as a means of identifying potential high payoff research tasks.
Bailey, A. R., Irish, L. A., Tagge, G. E.   +2 more
core   +1 more source

MULTIPLE INNER-LOOP CONTROL OF AN ELECTRO-HYDROSTATIC ACTUATOR [PDF]

, 2012
Hydraulic systems are commonly used for actuation and manipulation of heavy loads. They are found in a variety of different industries, such as in automotive, manufacturing, robotics, construction, and aerospace.
El, Sayed A. Mohammed
core  

A Complete Analysis for Pump Controlled Single Rod Actuators [PDF]

, 2016
In the current study a variable speed pump controlled hydrostatic circuit where an underlapped shuttle valve is utilized to compensate the unequal flow rate of a single rod actuator is analyzed.
Balkan, Tuna, Platin, Bülent E., Çalışkan, Hakan   +2 more
core   +1 more source

Simulation of MADMEL Power Systems Components [PDF]

, 1998
Detailed computer models of system components for More Electric Aircraft have been developed using the Advanced Control System Language (ACSL) and its graphical front-end, Graphic Modeller.
Krause, Paul C., Pekarek, Steven, Skvarenina, Timothy L., Wasynczuk, Oleg   +3 more
core   +2 more sources

Research on Parameter Tuning of Electro-Hydrostatic Actuator Position Sliding Mode Controller Based on Enhanced Dynamic Sand Cat Search Optimization Algorithm

Energies
This paper proposes an Enhanced Dynamic Sand Cat Search Optimization algorithm (EDSCSO) designed to address the high-order nonlinearities and strong coupling issues in the parameter tuning of the position sliding mode controller for electro-hydrostatic ...
Weibo Li, Shuai Cao, Xiaoqing Deng, Junjie Chen, Hao Zhang   +4 more
doaj   +1 more source