scholarly journals Simulation research on dynamic performance of the new type high-pressure solenoid valve

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Qihui YU ◽  
Qiancheng WANG ◽  
Kaifei ZHANG ◽  
Weiwei ZHENG
Keyword(s):  
High Pressure ◽  
Pulse Width Modulation ◽  
Aerodynamic Force ◽  
Dynamic Performance ◽  
Solenoid Valve ◽  
Force Model ◽  
Simulation Research ◽  
Response Characteristics ◽  
Electromagnetic Model ◽  
New Type

To improve energy density, the transportation, storage, and operations of hydrogen, methane, and compressed air vehicles currently require high-pressure compression. High-pressure solenoid valve becomes the vital element to above system. In order to reduce leakage and aerodynamic force influence, a new type high-pressure solenoid valve was proposed. The simulation model which included electromagnetic model, aerodynamic force model was established by means of the nonlinear mathematic models. Using the software MATLAB/Simulink for simulation, the dynamic response characteristics of high-pressure pneumatic solenoid valve were obtained under different pulse width modulation (PWM) input control signals. Results show that, first of all, the new type of high-pressure solenoid valve can meet the switch requirement. Secondly, the opening movement and closing movement of the spool lags the PWM rising signal, and the coil current fluctuates significantly during the movement of the spool. Lastly, on/off status of high-pressure valve cannot be represented by the duty cycle. This research can be referred in the design of the high-pressure solenoid valve..

Design and Simulation Research on a New Type of Movable Wedge – Ball Overrunning Clutch

2014 ◽  
Vol 556-562 ◽  
pp. 1362-1366
Author(s):  
Peng Wang ◽  
Ping Kang Li ◽  
Ling Liang Kong
Keyword(s):  
Structural Design ◽  
Structural Parameters ◽  
Dynamic Performance ◽  
The Self ◽  
Contact Theory ◽  
Hertz Contact ◽  
Simulation Research ◽  
Performance Indexes ◽  
New Type ◽  
Control Part

Firstly, a new type of Movable Wedge – Ball Overrunning Clutch (MWBOC) with separable control part has been proposed in this paper. With the axial arranged and detachable structure, the clutch could adjust the self-locking components conveniently and its driven part could rotate freely to control part. The mentioned special structures make the clutch more universal, flexible and lower maintenance costs. Then, according to Hertz Contact Theory, the static structural design and stress check has been implemented. Finally, relying on simulation on the established dynamic model, it can be proved that: With the designed structural parameters, the newly-designed controllable overrunning clutch could realize the designed functions reliably, and the requirements for dynamic performance indexes could be met also. Project supported by National Natural Science Foundation of China (Grant No. : 61074104 )

Method to reduce the oil pressure during HPHT diamond synthesis: FEM simulations and experiments

CrystEngComm ◽  
2020 ◽  
Vol 22 (44) ◽  
pp. 7601-7606
Author(s):  
Chunxiao Wang ◽  
Hong-an Ma ◽  
Liangchao Chen ◽  
Xinyuan Miao ◽  
Liang Zhao ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Cell Assembly ◽  
Diamond Synthesis ◽  
Fem Simulations ◽  
High Pressure High Temperature ◽  
New Type

Here, a new type of supercharged cell assembly is proposed that can effectively reduce the oil pressure during high-pressure, high-temperature (HPHT) diamond synthesis.

scholarly journals Numerical calculation and experimental study on response characteristics of pneumatic solenoid valves

2019 ◽  
Vol 52 (9-10) ◽  
pp. 1382-1393 ◽  
Author(s):  
Xiang Zhang ◽  
Yonghua Lu ◽  
Yang Li ◽  
Chi Zhang ◽  
Rui Wang
Keyword(s):  
Switching Time ◽  
Response Characteristic ◽  
Test System ◽  
Solenoid Valve ◽  
Circuit Model ◽  
Inlet Pressure ◽  
Driving Voltage ◽  
Response Characteristics ◽  
Aerodynamic Model ◽  
Set Up

In order to analyze the response characteristics of the solenoid valve in depth, the flow field of the solenoid valve is analyzed by means of the computational fluid dynamics, and the aerodynamic parameters that are difficult to be obtained by the traditional methods are obtained with software FLUENT. We also set up the mathematical model of the solenoid valve, including the aerodynamic model, the circuit model, the magnetic circuit model and the mechanical motion model. The calculation is completed in the Simulink, and the results of the calculation are analyzed. A set of the solenoid valve response characteristic test system is built, and the response characteristic parameters such as response time and maximum action frequency of the solenoid valve are tested. The experimental results are verified by comparing them with the simulation results. The final result shows that the response characteristics are basically irrelevant to the action frequency at a suitable working frequency. The open switching time of the solenoid valve decreases with the increase in the inlet pressure and the driving voltage and increases with the increase in the number of coil turns. The close switching time increases with the increase in the inlet pressure, the driving voltage and the number of coil turns.

Design of New Frequency Converter Based on TMS320LF2407A

2012 ◽  
Vol 466-467 ◽  
pp. 809-813
Author(s):  
Zhan Jun Yuan ◽  
Jin Wang
Keyword(s):  
Digital Signal Processor ◽  
Pulse Width Modulation ◽  
Frequency Converter ◽  
Dynamic Performance ◽  
Digital Signal ◽  
Control Precision ◽  
Software And Hardware ◽  
Converter Design ◽  
Utilization Ratio ◽  
High Control

In order to improve voltage utilization ratio and dynamic performance of frequency converter, this paper presents a digital frequency converter design scheme based on digital signal processor TMS320LF2407A and the theory of space vector pulse width modulation (SVPWM) technology, provides its detailed design measures of software and hardware and SVPWM algorithm realization methods. The experimental results prove that this new frequency converter has simple structure, high control precision, higher voltage utilization ratio, better dynamic and static property.

Development of a Damper Control System for Combined Cycle Thermal Gas Power Plant

2014 ◽  
Author(s):  
Amit Kumar Mondal ◽  
Vindhya Devalla ◽  
Vivek Kaundal ◽  
Kamal Bansal
Keyword(s):  
Heat Dissipation ◽  
Pulse Width Modulation ◽  
Low Frequency ◽  
Solenoid Valve ◽  
Combined Cycle ◽  
Solenoid Coil ◽  
Hydraulic Damper ◽  
Wireless Control ◽  
Damper Control ◽  
Gas Power Plant

This paper addresses a technique to solve the problem of heat dissipation in solenoid coil of the solenoid valve which is controlling the hydraulic damper by using pulse width modulation (PWM) switching technique with low frequency. In addition to this damper controlling is achieved via wireless controlling. By using PWM based low frequency switching technique the gas turbine trip will be protected. PWM is achieved by microcontroller and wireless control is done by ZigBee.

CAD AND CAE TECHNOLOGIES OF A NOVEL PLANE SIX-BAR SWAYING MACHINE

2008 ◽  
Vol 07 (01) ◽  
pp. 65-67
Author(s):  
CHANGPING ZOU ◽  
LI DU ◽  
XIANDE HUANG
Keyword(s):  
High Pressure ◽  
Kinetic Analysis ◽  
Rotational Speed ◽  
Preliminary Analysis ◽  
Unit Weight ◽  
The Novel ◽  
Parameterized Modeling ◽  
New Type ◽  
Working Principle ◽  
Key Dimensions

A new type of six-bar swaying machine was put forward, which is an ingenious combination of plane multi-bar mechanism and high pressure oil cylinder. Preliminary analysis shows that this machine has many advantages, such as the torque produced by its unit weight, its small size, its light deadweight, etc. Thus it can be applied to situations that need swaying mechanism with low rotational speed and great torque. Firstly, the mechanism composition and working principle of the swaying machine were introduced. Secondly, parameterized modeling of the mechanism was carried out by utilizing software ADAMS. Then kinematic analysis and kinetic analysis were completed by using ADAMS. Finally, key dimensions were adjusted according to kinetic analysis. These tasks are believed to be beneficial to the development of the novel transmission.

Research on the response characteristics of solenoid valve of the air-jet loom by simulation

2013 ◽  
Vol 22 (6) ◽  
pp. 606-612 ◽  
Author(s):  
Yuzhen Jin ◽  
Ruoyu Deng ◽  
Yingzi Jin ◽  
Xudong Hu
Keyword(s):  
Solenoid Valve ◽  
Response Characteristics ◽  
Air Jet ◽  
Air Jet Loom

Position Control of Hydraulic Actuators Using Fuzzy Pulse Width Modulation (PWM)

2015 ◽  
Vol 735 ◽  
pp. 294-298 ◽  
Author(s):  
Wei Ying Lai ◽  
Nurfarahin Onn ◽  
Collin Howe Hing Tang ◽  
Mohamed Hussein
Keyword(s):  
Fuzzy Logic ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Solenoid Valve ◽  
Operating Conditions ◽  
Hydraulic Actuators ◽  
Non Linear ◽  
Fuzzy Logic Approach ◽  
Logic Approach ◽  
Non Linear System

Hydraulic actuators are widely employed for industrial automation for its high power over weight ratio, functionality in tough operating conditions and low cost. However, the dynamics of hydraulic systems are non-linear and the system subjected to non-smooth and discontinuous non-linearities due to directional change of valve opening, friction, valve overlap and changes of hydraulic pressure acted on valve spool. Taking into account the effect of nonlinear parameter variations such as bulk modulus, compressibility of oil or viscosity of oil, fuzzy logic approach is chosen. Fuzzy control can adapt the inconstant working condition and non-linear system alongside of its robustness. For PWM controlled hydraulic component such as solenoid valve, effective approximation of the flow properties in a solenoid valve is essential. In this paper, the effect of fuzzy logic approach incorporated on pulse width modulation (PWM) controlled hydraulic system is to be investigated and experimentally verified.

Power transmission system modelling

1998 ◽  
Vol 212 (6) ◽  
pp. 497-505 ◽  
Author(s):  
H Bartlett ◽  
R Whalley
Keyword(s):  
Power Transmission ◽  
Dynamic Performance ◽  
Torsional Oscillation ◽  
Transmission System ◽  
System Modelling ◽  
Hybrid Modelling ◽  
Response Characteristics ◽  
Power Transmission System ◽  
Discrete Modelling ◽  
Modelling Techniques

This paper employs hybrid modelling techniques in the investigation of the dynamic performance of ‘long’ driveshafts, which include a clutch and load, for power transmission purposes. The power transmission system considered is suitable for a wide variety of applications in which the load is coupled directly to the clutch and hence to the ‘long’ driveshaft. Owing to the length of the shaft and relatively pointwise location of the clutch and load, a distributed—lumped (D—L) description of the arrangement is investigated. This enables the behaviour of the dispersed driveline shaft to be ‘adequately’ replicated along with the connecting elements. A discrete modelling approach is adopted and analysis and simulated response characteristics are presented, thereby validating the technique. Existing results on clutch judder are referred to and the interaction between judder and the driveshaft torsional oscillation is commented upon.

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