Results 241 to 250 of about 3,832 (301)
Application of distributed actuation mechanism to a hydraulic excavator
, 2014 It has been recently proven that the distributed actuation mechanism, as a new actuation mechanism, provides additional design freedom to maximize the performance of a given system.
In Gwun Jang, Young June Shin
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Simulation of a Hydraulic Actuator
IBM Journal of Research and Development, 1964A simple mathematical model of a hydraulic actuator is formulated, and the differential equations describing the model are derived. Experimental data and a computational solution of the model are determined. Results correspond favorably with oscilloscope velocity traces; hence the model could serve a useful purpose in mechanical design.
Albert H. Mitchell, Keith L. Johnson
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An hydraulically actuated isolated ventricle
Cardiovascular Research, 1974An apparatus is described that hydraulically actuates an excised dog ventricle. Cam-operated pumps programme flow through the heart valves to approximate in-vivo blood flow. The intact valves and the tortuous ventricular surface provide the authentic mixing influences that are important for indicator dilution studies.
R A, Lloyd, E M, Wilson
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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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A SDRE-based tracking control for a hydraulic actuation system
Mechanical Systems and Signal Processing, 2015 This paper presents the design and the experimental evaluation of a tracking control for a hydraulic actuation system in the presence of significant nonlinearities. The adopted control approach consists of a feedforward and a feedback term.
Salvatore Strano, Mario Terzo
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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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Cavitation in Valve-Controlled Hydraulic Actuators
Journal of Applied Mechanics, 1963Results of analytical and experimental studies of cavitation in valve-controlled hydraulic actuators under various dynamic conditions are presented. The analytical work consists of deriving approximate critical cavitation conditions for various operating modes.
Wang, P. K. C., Ma, J. T. S.
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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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