Results 31 to 40 of about 2,221 (181)
Applied Sciences, 2023 A new type dissimilar redundant actuation system (NT-DRAS), which is composed of an electro-hydrostatic actuator (EHA) and an electro-mechanical actuator (EMA), is applied in high value unmanned aerial vehicles such as the future near space vehicles to ...
Jian Huang +5 more
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Electro-hydrostatic compact drives with variable transmission ratio
Volume 2 - Conference, 2020 Electro-hydrostatic compact drives are an emerging technology within a range of industrially available translational drive solutions, combining the specific advantages of hydraulic and electromechanical screw drives. Compared to electromechanical screw drives, hydrostatic drives can vary their transmission ratio with comparably little effort, giving ...
Kolks, Giacomo, Weber, Jürgen
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Actuators, 2020 This paper investigates energy efficiency and dynamic behavior through simulation and experiments of a compact electro-hydrostatic actuator system (EHA) consisting of an electric motor, external gear pump/motors, hydraulic accumulator, and differential ...
Thales Agostini +3 more
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Research on Dual-Variable Integrated Electro-Hydrostatic Actuator
Chinese Journal of Aeronautics, 2006 AbstractThe integrated electro-hydrostatic actuator (EHA) with variable displacement and variable rotation speed is researched. In the system, the output of the actuator is changed by controlling the rotation speed of the brushless DC servomotor and the displacement of the servopump. The mathematical model described in state space model is created. The
GAO, Bo +3 more
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Hangkong gongcheng jinzhanThe landing-gear retracting and releasing，and braking system of unmanned aerial vehicle（UAV）plays a crucial role in the process of takeoff，landing，and braking of UAVs.
ZHANG Haoji
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Bioprinting Organs—Science or Fiction?—A Review From Students to Students
Advanced Healthcare Materials, EarlyView.Bioprinting artificial organs has the potential to revolutionize the medical field. This is a comprehensive review of the bioprinting workflow delving into the latest advancements in bioinks, materials and bioprinting techniques, exploring the critical stages of tissue maturation and functionality.
Nicoletta Murenu +18 more
wiley +1 more source
Highly Compact Swing Assistive Knee Prosthesis Integrating Active and Passive Hydraulic Systems
IEEE AccessThis work proposes a novel partially powered knee prosthesis to give full support to swing related activities. It represents a technological step forward when compared to microprocessor-controlled knees.
Marco Puliti +5 more
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Performance Analysis of an Electro-Hydrostatic Actuator
Journal of the Korean Society for Aeronautical & Space Sciences, 2007 The EHA(Electro-hydrostatic Actuator) reveals completely different characteristics from the conventional valve-controlled Electro-hydraulic actuators. In this paper, its mathematical model including nonlinear elements was derived to be verified by experiments.
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Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection
Advanced Materials, EarlyView.Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel +7 more
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Mathematics, 2021 In the existing literature, studies on position controller design using only position feedback, considering the disturbances for single-rod electro-hydrostatic actuators (EHAs), have not been reported.
Young Seop Son, Wonhee Kim
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