Results 1 to 10 of about 22,464 (227)
Direct-Drive Electro-Hydraulic Servo Valve Performance Characteristics Prediction Based on Big Data and Neural Networks [PDF]
Sensors, 2023 Direct-drive electro-hydraulic servo valves play a key role in aerospace control systems, and their operational stability and safety reliability are crucial to the safety, stability, and efficiency of the entire control system. Based on the prediction of
Juncheng Mi, Jin Yu, Guoqin Huang
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CFD-Based Physical Failure Modeling of Direct-Drive Electro-Hydraulic Servo Valve Spool and Sleeve [PDF]
Sensors, 2022 Direct-drive electro-hydraulic servo valves are used extensively in aerospace, military and control applications, but little research has been conducted on their service life and physical failure wear.
Guoqin Huang +3 more
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Analysis of the static and dynamic characteristics of the electro-hydraulic pressure servo valve of robot [PDF]
Scientific Reports, 2023 In this study, we comprehensively investigate the structure and operational principles of the Rotary Direct Drive Electro-Hydraulic Pressure Servo Valve (RDDPV).
Jianrui Zhang +4 more
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Investigation of temperature rise characteristics in the pre-stage of a deflector jet servo valve [PDF]
Scientific ReportsIn aerospace equipment, the deflector jet servo valve is a high-end core control component of electro-hydraulic servo systems. The pre-stage is crucial because of the compact structure and complex jet morphology.
Li Ma +4 more
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Deep reinforcement learning enhanced PID control for hydraulic servo systems in injection molding machines [PDF]
Scientific ReportsTo address the issue of insufficient position control accuracy in the servo-hydraulic system of injection molding machines under nonlinear characteristics and external disturbances, this paper proposes a novel adaptive PID control strategy enhanced by ...
Xiaoxi Hao +6 more
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Shock and Vibration, 2021 The wheel brake device is one of the most widely used landing deceleration devices in modern aircraft. For large aircraft, a multivalve parallel brake system is usually used.
Zhi-peng Huang +6 more
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Mechanism of temperature-induced zero drift on electro-hydraulic servo valve
AIP Advances, 2021 An electro-hydraulic servo valve is objectively asymmetrical in the process of fabrication and assembly, and the zero position is the result of comprehensive adjustment.
Li Ma, Hao Yan, Cunkun Cai, Yukai Ren
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Analysis and Suppression of Self-Excited Oscillations in Pressure Servo Valve System
Applied Sciences, 2022 In this paper, the phenomenon of pressure servo valve system self-excited oscillation is studied, the dynamic model of the system is established, and the validity of the model is verified by experimental analysis.
Jian Huang +4 more
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Alexandria Engineering Journal, 2023 The performance of deflector jet servo-valve is highly affected by the flow field characteristics in the pilot stage of the deflector jet servo-valve. This research used the large eddy simulation method to study the pressure pulsation characteristics of ...
Hazem K. Abdallah +2 more
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Aerospace, 2023 The closed-loop constant pressure drop control valve is widely used in aero-engine fuel servo metering systems. However, the available constant pressure drop control valve cannot realize servo tracking without static error and, often, a high proportional
Wenshuai Zhao +4 more
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