Results 21 to 30 of about 2,727 (142)
Journal of Physics: Conference Series, 2023 Abstract Pump-controlled hydraulic circuits are more efficient than conventional valve-controlled ones. Pump-controlled hydraulic circuits for double rod cylinders are well developed and, presently, implemented in many applications including aviation.
A Imam, M S Tolba, N Sepehri
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Actuators, 2023 Technical solutions based on biological models are the subject of research by a wide range of experts and mainly concern their mechanical use. When designing a suitable actuator, they use the physical methods of biological representatives, of which a ...
Peter Tuleja +4 more
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Position Control of a Single-Rod Electro-Hydrostatic Actuator Experiencing a Leaky Piston Seal
Mathematical Problems in Engineering, 2022 Single-rod cylinders are generally employed in electro-hydrostatic actuators (EHAs). A condition that is difficult to detect and could degrade the performance in single-rod EHAs, is the faulty cylinder piston seal. It causes internal leakage from one chamber of the actuator to another.
Guangan Ren +3 more
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A throttle-less single-rod hydraulic cylinder positioning system: Design and experimental evaluation
Advances in Mechanical Engineering, 2015 Modern industrial tote dumpers and lifters are equipped with long-stroke single-rod hydraulic cylinders. For years, valve-controlled cylinders have been used in tote dumpers.
Ehsan Jalayeri +3 more
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Наука и техника, 2018 The article deals with one of the ways to control an actuator of the automated clutch control system. The aim is to design control of the electropneumatic actuator, to control its coupling with the acceleration valve on the basis of experimental research
O. A. Yaryta +6 more
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Magnetically Controlled Growing Rods: The Experience of Mechanical Failure from a Single Center Consecutive Series of 28 Children with a Minimum Follow-up of 2 Years [PDF]
Asian Spine Journal, 2018 Study Design Retrospective observational study of a continuous series of 28 children. Purpose To determine the mechanical failure rate in our cohort of children treated with magnetically controlled growth rods (MCGRs).
Alastair Beaven +5 more
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A Complete Analysis for Pump Controlled Single Rod Actuators
, 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. Parameters of the shuttle valve are included in the system analysis, rather than treating it as an ideal switching element as handled in literature.
Çalışkan, Hakan +2 more
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A Critical Analysis of Valve-Compensated Hydrostatic Actuators: Qualitative Investigation
Actuators, 2019 Hydrostatic actuation has gained interest from both academia and industry due to the unquestionable energetic advantages when compared to valve-controlled actuators; the main feature being the absence of throttling losses due to the direct control of the
Gustavo Koury Costa, Nariman Sepehri
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A Self-Contained Electro-Hydraulic Cylinder with Passive Load-Holding Capability
Energies, 2019 Self-contained electro-hydraulic cylinders have the potential to replace both conventional hydraulic systems and the electro-mechanical counterparts enhancing energy efficiency, plug-and-play installation, and reduced maintenance.
Damiano Padovani +3 more
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Adaptive Dynamic Surface Control of Pneumatic Servo Systems With Valve Dead-Zone Compensation
IEEE Access, 2018 An adaptive dynamic surface controller (ADSC), which comprises an online parameter estimator and a robust control law, is developed for the pneumatic servo systems driven by the proportional directional control valves.
Deyuan Meng +4 more
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