Static and Dynamic Characteristics of a Two Stage Pilot Relief Valve

1991 ◽  
Vol 113 (2) ◽  
pp. 280-288 ◽  
Author(s):  
Yung C. Shin
Keyword(s):  
Sensitivity Analysis ◽  
Computer Simulation ◽  
Dynamic Characteristics ◽  
Dynamic Equations ◽  
Governing Equations ◽  
Relief Valve ◽  
Two Stage ◽  
Static And Dynamic Characteristics ◽  
Response Characteristics ◽  
Simulation Results

Static and dynamic characteristics of a two stage relief valve have been studied theoretically and experimentally. The governing equations of the valve have been derived and sensitivity analysis was performed by digital computer simulation on the valve response characteristics based on the established dynamic equations of the motions of the valve. From this study, significant parameters on the valve response were identified, which can be modified to improve the dynamic characteristics of the valve. Subsequently, experiments were performed with a specially fabricated Vickers type pilot relief valve. The results showed fair agreement with the simulation results, thus proving the validity of the model.

Optimization of Performance Characteristics of Electropneumatic (Two-Stage) Servo Valve

2004 ◽  
Vol 126 (2) ◽  
pp. 416-420 ◽  
Author(s):  
Dr. Igor L. Krivts
Keyword(s):  
Computer Simulation ◽  
Dynamic Characteristics ◽  
Supply Side ◽  
Two Stage ◽  
Exhaust Port ◽  
Static And Dynamic Characteristics ◽  
Servo Valve ◽  
Supply Channel ◽  
Optimal Value ◽  
Power Stage

Servo valve is the key element in electropneumatic servomechanism. In this study, an electropneumatic two-stage servo valves were investigated in order to improve their static and dynamic characteristics. These servo valves consist of a pilot stage and a power stage. The paper discusses three different pilot stages: the jet pipe pilot stage, the supply (side) flapper nozzle pilot stage and the exhaust (side) flapper nozzle pilot stage. The static and dynamic characteristics of the devices were investigated analytically and by computer simulation. For the three pilot stage types it was found that the optimal value of the static and dynamic characteristics could be obtained if the ratio between the effective areas of the supply channel and exhaust port of the pilot stage has a definite value (depending on the pilot stage type).

The static and dynamic characteristics of a pressure relief valve with a proportional solenoid-controlled pilot stage

2002 ◽  
Vol 216 (2) ◽  
pp. 143-156 ◽  
Author(s):  
R Maiti ◽  
R Saha ◽  
J Watton
Keyword(s):  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Dynamic Behaviour ◽  
Practical Experience ◽  
Pressure Relief Valve ◽  
Relief Valve ◽  
Pressure Relief ◽  
Static And Dynamic Characteristics ◽  
Good Comparison ◽  
The Mathematical Model

The steady state and dynamic characteristics of a two-stage pressure relief valve with proportional solenoid control of the pilot stage is studied theoretically as well as experimentally. The mathematical model is studied within the MATLAB-SIMULINK environment and the non-linearities have been considered via the use of appropriate SIMULINK blocks. The detailed modelling has resulted in a good comparison between simulation and measurement, albeit assumptions had to be made regarding the solenoid dynamic characteristic based upon practical experience. The use of this characteristic combined with additional dynamic terms not previously considered allows new estimations of internal characteristics to be made such as the damping flowrate. The overall dynamic behaviour has been shown to be dominated by the solenoid characteristic relating force to applied voltage.

The Modeling and Simulation of Two-Way Cartridge Check Valve Based on the AMESim

2013 ◽  
Vol 706-708 ◽  
pp. 1635-1638
Author(s):  
Gui Hua Fang ◽  
Wen Bin He ◽  
Ya Bin Liu
Keyword(s):  
Modeling And Simulation ◽  
Dynamic Simulation ◽  
Dynamic Characteristics ◽  
Structural Characteristics ◽  
Check Valve ◽  
Static And Dynamic Characteristics ◽  
Working Principle ◽  
Simulation Results

According to the structural characteristics and working principle of the two-way cartridge check valve, the static and dynamic characteristics are analysed, the AMESim model is built, and the dynamic simulation of analysis is investigated. Through analyzing the simulation results to prove the rationality of the model.

Simulation on Static and Dynamic Characteristics of Servovalve

2012 ◽  
Vol 163 ◽  
pp. 281-285
Author(s):  
Meng Li ◽  
Xu Dong Pan ◽  
Guang Lin Wang ◽  
Bo Yan Song
Keyword(s):  
Simulation Model ◽  
Dynamic Characteristics ◽  
Characteristic Curve ◽  
Secondary Development ◽  
Simulation Environment ◽  
Two Stage ◽  
Characteristic Curves ◽  
Static And Dynamic Characteristics ◽  
Component Design ◽  
Amesim Simulation

In this paper, we build a simulation model of the two stage flapper-nozzle electro hydraulic servovalve with the hydraulic component design libraries and the AMESet secondary development of modeling in AMESim simulation environment. By adjusting the parameters of the model, the performance of the servovalve were analyzed. At the same time, we can get the characteristic curve of the servovalve. These characteristic curves can describe the static and dynamic characteristics of the valve which can greatly guide for the study of the servovalve.

High-Voltage Ultra-Fast Pulse Diode Stack Based on 4H-SiC

2016 ◽  
Vol 858 ◽  
pp. 786-789 ◽  
Author(s):  
Vladimir A. Ilyin ◽  
Alexey V. Afanasyev ◽  
Boris V. Ivanov ◽  
Alexey F. Kardo-Sysoev ◽  
Victor V. Luchinin ◽  
...  
Keyword(s):  
High Voltage ◽  
Dynamic Characteristics ◽  
Leading Edge ◽  
Edge Length ◽  
Static And Dynamic Characteristics ◽  
Switching Performance ◽  
Bandgap Narrowing ◽  
Heavily Doped ◽  
Simulation Results ◽  
Fast Pulse

The paper reports on the results of the studies of static and dynamic characteristics of 4H-SiC drift step recovery diodes (DSRDs) assembled in diode stacks. Switching performance of single dies has been simulated and experimentally confirmed. It was established that the switching process is determined primarily by the incomplete ionization of acceptors in 4H-SiC and by the bandgap narrowing in heavily doped emitters. Based on the simulation results the optimized die size has been selected. For DSRD stacks of 4 and 8 dies I-V and C-V measurements are reported. The stacks were dynamically tested in a special oscillator circuit. Repetitive voltage pulses of 10.5 kV with the leading edge length of 900 ps were demonstrated.

Multidomain Modeling of Jet Pipe Electro-Hydraulic Servo Valve

2012 ◽  
Vol 233 ◽  
pp. 17-23 ◽  
Author(s):  
Yun Jiang Cheng ◽  
Shu Han Wang ◽  
Xiang Yang Xu ◽  
Wen Yong Li
Keyword(s):  
Flow Control ◽  
Dynamic Characteristics ◽  
Hydraulic System ◽  
High Performance ◽  
Simulation Tool ◽  
Two Stage ◽  
Static And Dynamic Characteristics ◽  
Servo Valve ◽  
Hydraulic Servo

The 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 high-performance jet pipe electro-hydraulic servo valve.

scholarly journals Static and dynamic characteristics of proportional directional valve

2019 ◽  
Vol 213 ◽  
pp. 02052
Author(s):  
Marian Ledvoň ◽  
Lumír Hružík ◽  
Adam Bureček ◽  
Martin Vašina
Keyword(s):  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Experimental Measurement ◽  
Static Characteristic ◽  
Experimental Equipment ◽  
Static And Dynamic Characteristics ◽  
Simulation Results ◽  
The Mathematical Model ◽  
Proportional Directional Valve ◽  
Characteristic Pressure

This article deals with experimental measurement and numerical simulation of static and dynamic characteristics of the proportional directional valve. The characteristics of the proportional directional valve are measured on experimental equipment. At the static characteristic, pressure drop on the proportional directional valve, flow and oil temperature are measured on this equipment. The spool position is measured to determine of the dynamic characteristic of the proportional directional valve. Mathematical model of the proportional directional valve is created using Matlab SimScape Fluids software and is complemented by a mathematical model of the experimental equipment. The simulation results on the mathematical model are compared with the results of the experimental measurement.

The Analysis of Static and Dynamic Characteristics of Motorized High-Speed Spindle Based on Sensitivity Analysis of FEM Model

2010 ◽  
Vol 43 ◽  
pp. 376-381
Author(s):  
Song Mei Yuan ◽  
Mao Bin Lv ◽  
Xue Hao Liu
Keyword(s):  
Sensitivity Analysis ◽  
Objective Function ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Design Sensitivity ◽  
Design Parameters ◽  
Static Stiffness ◽  
Fem Model ◽  
Static And Dynamic Characteristics

In order to estimate the static and dynamic characteristics of motorized high-speed spindle, the full parameterized FEM model of it is established and studied in the paper. After the FEM analysis of the spindle, the static stiffness, natural frequency and normal modes of vibration are obtained. Then, a design sensitivity analysis of some design parameters is conducted based on the finite element model to investigate their influence on the static stiffness and natural frequency of the spindle system. Through the sensitivity analysis, the optimal plan is proposed, the first natural frequency as the first objective function of optimization and the static stiffness as the second, which changes the objective function of multivariable into that of a single one. Therefore, it considerably increases the efficiency of optimization. The optimization leads to a noticeable improvement of static stiffness and first-mode natural frequency.

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