Results 221 to 230 of about 450,434 (280)
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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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IEEE Transactions on Industrial Electronics, 2017
In this study, bilateral control between electric and hydraulic actuators is investigated. Bilateral control realizes telemanipulation of remote robots with the sense of touch. We focus on the system of local (master) robots, manipulated by operators that are driven by electric actuators, and slave robots, which work in remote places that are driven by
Sho Sakaino +2 more
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In this study, bilateral control between electric and hydraulic actuators is investigated. Bilateral control realizes telemanipulation of remote robots with the sense of touch. We focus on the system of local (master) robots, manipulated by operators that are driven by electric actuators, and slave robots, which work in remote places that are driven by
Sho Sakaino +2 more
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Nonlinear optimal control of electro-hydraulic actuators
IFAC Journal of Systems and Control, 2021Abstract A nonlinear optimal (H-infinity) control approach is proposed for electro-hydraulic actuators. Control of electrohydraulic actuators is a non-trivial problem because of the nonlinearities and underactuation in their dynamics. The article’s approach relies first on approximate linearization of the state–space model of the electrohydraulic ...
Rigatos, G. +3 more
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Power hydraulics - switched mode control of hydraulic actuation
2010 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2010This paper is concerned with the application of switching technology to hydraulic actuation. Over the last 50 years with advances in power electronics, faster and faster static switches have been developed and applied to the control of motors. Hydraulic technology evolved in the opposite direction: switching control was not considered, and more and ...
Emanuele Guglielmino +4 more
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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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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 ...
Manuel A. Avila +2 more
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VS-ACC applied to a hydraulic actuator
Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334), 2000In this paper a complete stability proof of a cascade controller applied to a hydraulic actuator is presented. To deal with the mechanical and hydraulic uncertainties an adaptive and a variable structure control law are combined. The theoretical approach may be generalized to the case of hydraulically driven manipulators. An experimental implementation
Raul Guenther +3 more
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Leg mechanisms for hydraulically actuated robots
2009 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2009The performance of highly dynamic robotic machines is directly associated with both the actuation means and the specific mechanical properties/configuration of the system. Hydraulic actuation demonstrates significant competitive advantages when minimum weight and volume, large forces and wide range of speeds are required and this makes it very suitable
Yousheng Yang +4 more
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Hydraulic actuators in application of robot manipulator
2012 IEEE International Conference on Automation Science and Engineering (CASE), 2012Application of hydraulic actuators to robotic systems has different areas where electric motor system cannot be used. High bandwidth together with high force and torque make the system smaller and faster. Some examples are introduced made by KNR systems Inc.
Seongcheol Jang +5 more
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A magnetorheological hydraulic actuator driven by a piezopump
SPIE Proceedings, 2003Magnetorheological (MR) fluids can be used in a variety of smart semi-active systems. The MR damper shows an especially great potential to mitigate environmentally induced vibration and shocks. Another aspect of MR fluids is the construction of MR valve network in conjunction with a hydraulic pump resulting in a fully active actuator. These devices are
Jin-Hyeong Yoo +3 more
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