Results 241 to 250 of about 40,379 (295)
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Pneumatic and hydraulic actuators
1983When fluid energy is transformed into mechanical energy there are two operating mechanisms, static and dynamic, to be considered.
François Lhôte +3 more
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Robust microvalves for hydraulic actuators
SPIE Proceedings, 2003Robust compact hydraulic actuators are extremely needed in space industry where payload is critical. Microvalves are key component for compact hydraulic actuators. Robust microvalves with large load bearing ability, large flow rate, and high operational frequency are objectives of this research.
Quanfang Chen +3 more
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Hydraulic actuator with overpressure compensation
2020L'invention concerne un actionneur hydraulique comprenant une pompe (12) volumétrique à débit variable, un organe (20) permettant de faire varier en continu le débit de la pompe (12), l'organe (20) étant actionné par un vérin (40) alimenté par un premier distributeur (48) commandé en fonction d'un ordre de déplacement de l'actionneur (10).
Alfayad, Samer +2 more
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Electro-Hydrodynamic Pumped Hydraulic Actuation
Vibration and Noise Control, 1998Abstract A new type of actuation device has been conceptualized that meets the needs of both large displacement, force and bandwidth within a package more compact than currently available magnetostrictive and stack-type piezo actuators of similar rating. This concept relies on micro-scale electrohydrodynamic (EHD) pumping of a dielectric
S. Kang, K. P. Hallinan, R. Kashani
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Applications of electro-hydraulics actuators
SoutheastCon 2016, 2016Electro-hydraulic systems can be used in robust robotics systems that have to carry heavier loads efficiently. Electrical drives have proven to be reliable and easy to control, but they may have problems when it comes to holding a position under load for a long period of time.
Vukica Jovanovic +3 more
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Electro-hydraulic actuator trajectory tracking
Proceedings of the 2004 American Control Conference, 2004This paper combines block control, sliding mode control and integral control techniques to design a controller, which is able to force an electrohydraulic actuator driven by a servovalve to track a given chaotic reference trajectory. This approach enables to compensate the inherent nonlinearities of the actuator and to reject external constant ...
M.A. Avila, A.G. Loukianov, E.N. Sanchez
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Fairey Hydraulics—Surface Actuators
Aircraft Engineering and Aerospace Technology, 1968THE Jaguar stands out today as one of the most successful examples of international collaboration in the whole field of aerospace technology. It is only just over three years since Britain and France decided to pool resources and produce a common aircraft type — or rather a closely related family of types — to meet their needs for ground attack, close ...
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A hydraulically actuated compound pendulum
Proceeding of the 1996 IEEE International Conference on Control Applications IEEE International Conference on Control Applications held together with IEEE International Symposium on Intelligent Control IEEE International Symposium on Computer-Aided Contro, 2002This paper describes the design, manufacture, and implementation of an experimental apparatus, namely, a "rotational compound pendulum", which is currently under development in the Controls Lab at the Mechanical Engineering Department at Kansas State University. The project is partially funded by the National Science Foundation.
W.N. White, A.G. Kelkar, R.C. Fales
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Hydraulic actuated brake and electromechanically actuated brake systems
International Conference on Advanced Driver Assistance Systems (ADAS), 2001The paper outlines simulation studies and investigations of a hydraulic actuated brake (HAB) and an alternative electromechanically actuated brake (EMB) system on a half-car model using the Simulink environment. The vehicle simulation model used is briefly explained as follows.
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Digital Algorithm for Hydraulic Actuator
SAE Technical Paper Series, 1986<div class="htmlview paragraph">An electronically controlled Easy Drive System (EDS), the NAVI-5, is now used in the Isuzu Aska, to permit automatic gear changes with in the basic structure of a manual transmission. This is achieved by synchromeshed transmission gears and a single disk dry clutch operated by hydraulic actuators and controlled by ...
Makoto Uriuhara +3 more
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