Results 21 to 30 of about 3,510 (216)
Displacement comparison of hydraulic servo-motor when servo valve is stuck.
, 2023 Displacement comparison of hydraulic servo-motor when servo valve is stuck.
Qing Li (84975), Ling Zhong (209116)
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Built-in test technology for electro-hydraulic servo-valve amplifier
Zhongguo Jianchuan Yanjiu, 2021 Objectives The electro-hydraulic servo valve operates in a harsh working environment but lacks integrated testability. In order to improve the usability and maintainability of electro-hydraulic servo valves, it is necessary to design a built-in test (BIT)
Jianping YUAN, Hanbing SUN
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Development of rotary servo valve
Proceedings of the JFPS International Symposium on Fluid Power, 1993 Conventional electro-hydraulic servo valves have sleeves and spools which move axially to control the flow of fluid. However, very high manufacturing technology is required to make them. This paper describes a newly developed rotary servo valve that has a simple structure and is directly operated.
NOGAMI, TADAHIKO +3 more
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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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IEEE Access, 2020 For the purpose of reducing power consumption of a leg exoskeleton for augmenting human performance, a novel hybrid hydraulic system (HHS) which includes a unidirectional servo valve and a solenoid on-off valve is excogitated, and its energy saving ...
Yong Yang +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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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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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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Numerical Simulation of Jet Pipe Servo Valve
, 2020 The jet pipe servo valve (jet valve) is the most widely used flow control servo valve on aircrafts and spacecrafts. However, the valve has not been simulated accurately due to its special structure and complex internal flow field.
Junshuo Chen +3 more
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