Results 31 to 40 of about 24,820 (277)
Mathematics, 2020 In existing methods, full-state feedback is required for the position tracking of single-rod Electro Hydrostatic Actuators (EHAs). Measuring a full state is not always possible because of cost and space limitations.
Wonhee Kim, Daehee Won
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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
doaj +1 more source
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
openaire +1 more source
VARIABLE STRUCTURE CONTROLLER OF NOVEL EMBEDDED SMA ACTUATORS
Electrica, 2005 A novel shape memory alloy (SMA) actuator consisting of a cylindrical rod with a single off-axis embedded one-way SMA wire is first described. The actuators, acting as both actuating elements and executing elements, are compact enough to be used in ...
Yang Kai, Gu Chenglin
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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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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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DESIGN AND CONTROL OF NOVEL EMBEDDED SMA ACTUATORS
Electrica, 2002 A novel shape memory alloy (SMA) actuator consisting of a cylindrical rod with a single off-axis embedded one-way SMA wire is first described. The actuators, acting as both actuating elements and executing elements, are compact enough to be used in ...
Güven KÖMÜRGÖZ KIRIS, Ibrahim ÖZKOL
doaj +2 more sources
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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Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
A nonlinear theory for fibre-reinforced magneto-elastic rods
, 2017 We derive a model for the finite motion of a magneto-elastic rod reinforced with isotropic (spherical) or anisotropic (ellipsoidal) inclusions. The particles are assumed weakly and uniformly magnetised, rigid and firmly embedded into the elastomeric ...
Ciambella, Jacopo +2 more
core +1 more source