Results 111 to 120 of about 545,828 (225)

A New Active Disturbance Rejection Control Tuning Method for High-Order Electro-Hydraulic Servo Systems

open access: yesActuators
In our industry, active disturbance rejection control already has been used to enhance the performance of the electro-hydraulic servo systems, despite the fact that electro-hydraulic servo systems are usually reduced to first-order and second-order ...
Junli Zhang   +3 more
doaj   +1 more source

Methane Valorization Toward Carbon Neutralization: Catalytic Materials, Multiphase Interfaces, and Reactor Engineering Under Mild Conditions

open access: yesCarbon Neutralization, Volume 5, Issue 5, September 2026.
The valorization of CH4 toward carbon neutralization and energy sustainability: transforming global emissions into high‐–value products via mild catalytic strategies. ABSTRACT The direct conversion of methane into value‐added chemicals under mild conditions offers a sustainable pathway to utilize this abundant hydrocarbon feedstock and mitigate ...
Hengchi Liu   +7 more
wiley   +1 more source

Intelligence Mining with Electro-Hydraulic Control Technology

open access: yes, 2011
The underlying way to reduce accidents is reducing the number of workers on the coal face. Automatic mining can realize this object. The key for unmanned automatic mining is the application of electro-hydraulic control technology used on workface support.
Yong Yi Liu   +7 more
core   +1 more source

Xenotime‐Type Rare‐Earth Orthophosphates REPO4 for Use as High‐Temperature Environmental Barrier Coatings

open access: yesJournal of the American Ceramic Society, Volume 109, Issue 9, September 2026.
Can we make a more inexpensive and greener coating using naturally forming minerals? Xenotime mineral composition was determined to be (Y0.80Gd0.04Dy0.07Er0.05Yb0.04)PO4. Preliminary studies into REPO4 species showed compatable CTE match with SiC, formation of a multilayer reaction product that improves CMAS resistance, and parabolic growth rates ...
Imoen Hawthorne   +3 more
wiley   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

open access: yesExperimental Physiology, Volume 111, Issue 9, Page 4015-4040, 1 September 2026.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Stable Switching Control Strategy of the Support Pressure and Velocity of Shield Machine Gripper Shoes

open access: yesShock and Vibration, 2019
An electro-hydraulic servo position and pressure compound control method was investigated considering the working principle of a hydraulic stepping motor of a shield machine gripper shoe and its practical working characteristics in the supporting process.
Nannan Liu   +4 more
doaj   +1 more source

Comparison of electro-hydraulic and electro-mechanic landing gear actuation for light VTOL aircraft

open access: yes, 2021
In this paper, a landing gear actuation system for a light VTOL aircraft is predesigned aiming for minimal power consumption and low weight.
Thielecke, Frank, Springmann, Raphael
core   +1 more source

Non-Inertial Dynamic Analysis of 3-SPS/U Parallel Platform by Screw Theory and Kane’s Method

open access: yesActuators
This paper presents an improved method for the non-inertial dynamic analysis of the 3-SPS/U parallel platform (3-SPS/U PM), employing the screw theory and Kane’s method, where S, P, and U denote spherical, prismatic, and universal joints, respectively ...
Tianzhu Wang   +7 more
doaj   +1 more source

Direct Drive Volume Control Electro-Hydraulic Servo Ship Rudder

open access: yes, 2010
Direct drive volume control(DDVC)electro-hydraulic servo system has synthesized the advantages of high power of hydraulic system and flexible control of the motor.
Wen Hai Su, Ji Hai Jiang
core   +1 more source

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