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Research of non-servo valve electro-hydraulic servo system
Proceedings of 2011 International Conference on Electronic & Mechanical Engineering and Information Technology, 2011A new non-servo valve electro-hydraulic servo system was researched. To control load, the system uses bidirectional fixed displacement hydraulic pump that is driven by AC PMSM directly drives servo-hydraulic cylinder. The hydraulic actuating unit was designed base on one design parameter and performance target.
Geqiang Li, Hanjie Wang, Xiaodong Huang
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Iterative Learning Control of Double Servo Valve Controlled Electro Hydraulic Servo System
2011 Seventh International Conference on Computational Intelligence and Security, 2011Aimed at electro-hydraulic servo force control system, according to the nonlinear of electric-hydraulic servo valve, to improve the speed of equivalent valve response, we propose the double electric-hydraulic servo valve parallel control, and two servo valve are controlled by their respective controller, the same signal inputs two controller, every ...
Shaojuan Yu, Junjun Song
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Multidomain Modeling of Jet Pipe Electro-Hydraulic Servo Valve
Applied Mechanics and Materials, 2012The jet pipe electro-hydraulic servo valve is a typical two-stage flow control servo valve, its static and dynamic characteristics are analyzed in this paper. The interaction of the mechatronic and hydraulic system is considered by multidomain simulation tool, the all key parameters are tunable and this provides the optimal possibility to develop a ...
Yun Jiang Cheng +3 more
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Applying the Electro-Hydraulic Servo Valve to Industry
IRE Transactions on Industrial Electronics, 1958The industrial control field is constantly adapting new techniques and procedures. These changes are motivated by industry's need to tum out their products faster and with greater precision. To make these improvements possible the manufacturers of mechanical, electrical, pneumatic, and hydraulic equipment are constantly developing new components and ...
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Modeling and Key Technologies Study of Three-Stage Electro-Hydraulic Servo Valve
2009 International Asia Conference on Informatics in Control, Automation and Robotics, 2009The modeling and study of three-stage electro-hydraulic servo valve are presented in this paper. According to its construction and principle, its model is built. The results of simulation and experimental test are consistent, which proves the validity of the model. Based on the study of the model, the performances of three-stage electro-hydraulic servo
Xiaochu Liu +4 more
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Electro-Hydraulic Servo Valve — Applications in Construction Machinery
SAE Technical Paper Series, 1967<div class="section abstract"><div class="htmlview paragraph">This paper describes four general types of servo-valves and lists some of the advantages and problems of their use in controlling construction machinery. It describes in detail two applications to construction machinery showing the associated electronic sensing and amplifying ...
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Simulation-Based Performance Degradation Prognostics of Electro-Hydraulic Servo Valve
Applied Mechanics and Materials, 2014Simulation-based performance degradation prognostics should firstly obtain the judgment criterion to predict degradation failure, how systems or its components degenerate, and then how to display effect of degradation process on performance. In this paper, we presented a model-based performance degradation prognostic method to address this problem. For
Zi Tan Zhao, Jian Bin Guo
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Performance improvement of electro-hydraulic servo valve based on pole placement
2015 15th International Conference on Control, Automation and Systems (ICCAS), 2015Performance of servo valve has already been analyzed and improved in the S-domain which is a kind of classical control. In this paper, performance improvement of servo valve is conducted by pole placement that is a method of modern control. Consequently, controllability and stability of suggested model is confirmed and performance improvement is ...
Ji U Kim +3 more
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Simulation Model and Experimental Verification of Electro-Hydraulic Servo Valve
Applied Mechanics and Materials, 2013Structure and working principle of the two-stage moving coil electro-hydraulic servo valve has been analyzed. Through Laplace transformation to get the transfer function by the dynamic equations of the moving coil force motor, the displacement and current double closed loop control to simulate the force output characteristics, ignoring the ...
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New Modeling and Analysis of Three-Stage Electro-Hydraulic Servo Valve
2008 International Workshop on Modelling, Simulation and Optimization, 2008To develop higher performance three-stage electro-hydraulic servo valve, a new modeling software, AMEsim, is used to develop its non-linear model according to the construction and principles presented in this paper. The results of simulation and experimental test about an existing valve are consistent, which proves the model is right.
Xiaochu Liu +4 more
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