Results 21 to 30 of about 22,464 (227)
Development of a Photo-Fluidic Control Valve without Mechanical Moving Parts
Journal of Fluid Science and Technology, 2010 An optical servo system is a new control system which can be used in hazardous environments; such as those with electromagnetic influence, radiation and so on. The purpose of our study is to develop such an optical control system.
Tetsuya AKAGI, Shujiro DOHTA
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Analysis and optimization of the pilot stage of jet pipe servo valve
Alexandria Engineering Journal, 2022 Based on the principle of two-phase hydrodynamics and the mechanism of cavitation generation, this paper uses the finite volume method (FVM) in computational fluid dynamics (CFD) to analyse the features of fluid flow in jet amplifier, i.e., the pilot ...
Ying Zhang
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The Journal of Engineering, 2019 A directional drilling tool control unit whose design is based on servo control of a rotary valve using the roll-stabilised instrumented system approach has been successfully used in oil fields for over 20 years.
Hamid Alturbeh +3 more
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Design and simulation of hydraulic auto-brake-valve of unmanned aerial vehicle
The Journal of Engineering, 2020 This study designs one kind of hydraulic auto-brake-valve calculates its driving force and velocity, simulates its braking force and stability, in order to accomplish auto brake in the landing condition and keep braking in cruising condition of the ...
Gu Feng, Zhu Bo, Ju Hong Fu
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International Journal of Aerospace Engineering, 2021 The deflector jet pressure servo valve is a kind of high-precision hydraulic component that can be widely used in the antiskid braking system of an aircraft. In actual service, it will be faced with extreme working conditions of gradual oil contamination,
Yuanbo Chu +3 more
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Research on thermodynamic modeling and temperature prediction of double flapper-nozzle servo valves
Case Studies in Thermal EngineeringThe thermal characteristic design of the aerospace servo valve is of significant importance due to the high temperature operating conditions. This paper aims to study the law of temperature variation of the internal chambers and shell of the servo valve ...
Lei Li, Gen Wang, Libo Qiu, Cunkun Cai
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Energies, 2021 In many heavy machines, the use of high force drives is required. For such tasks, electrohydraulic servo drives with proportional valves are used most often. In these valves, the proportional electromagnets are applied.
Andrzej Milecki, Jarosław Ortmann
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Aircraft Anti-Skid Brake Control Based on High-Speed on-off Valve
MATEC Web of Conferences, 2015 Aircraft hydraulic brake system usually use pressure servo valve for anti-skid brake control. As pressure servo valve realizes the pressure closed loop by hydraulic feedback loop, this structure increased the complexity of the processing and ...
Li Wei, Zhang Hu, Huang Xiaoya
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Study on the Digital Hydraulic Driving System of the Belt Conveyor
Machines, 2022 The electrohydraulic equipment of the coal gangue belt conveyor has been widely studied in recent years, but studies have been limited to the traditional hydraulic system with proportional valve and servo valve as control elements.
Meisheng Yang
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High Precise Fuzzy Control for Piezoelectric Direct Drive Electro-Hydraulic Servo Valve
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2012 As the core part of the electro-hydraulic servo system, the electro-hydraulic servo valve plays an important role in the system. Due to the piezoelectric actuator has characteristics of fast response, easy control and high control accuracy, it can be ...
Miaolei ZHOU +3 more
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