Analysis on the Shifting Performance of the Hydraulic System of a Transmission for Construction Machinery

2011 ◽  
Vol 201-203 ◽  
pp. 2206-2211
Author(s):  
Yan Min Li ◽  
Zhi Hua Liu ◽  
Dong Wang ◽  
Yong Zhang
Keyword(s):  
Simulation Model ◽  
Hydraulic System ◽  
Response Speed ◽  
Hydraulic Cylinder ◽  
Fast Response ◽  
Double Step ◽  
Construction Machinery ◽  
The Future ◽  
Simulation Results ◽  
Cartridge Valves

The paper discusses the performance of a hydraulic system controlling the shifting action of a construction vehicle transmission. Based on the principle of the hydraulic system of the transmission, a simulation model of the hydraulic system is established using AMEsim software. The simulation results indicate that the double-step hydraulic cylinder structure has an advantage of a fast, smooth and reliable shifting. The shifting connecting and separating overlap time of two clutches can be controlled precisely by an electronic joystick. The fast response speed can be ensured because using screw-in cartridge valves acting as the directional valves. Some techniques of improving the shifting quality are obtained. There is a great reference for the construction vehicles’ transmission in the future.

PI Control of Proportional Valve-Cylinder Water Hydraulic System

2014 ◽  
Vol 548-549 ◽  
pp. 977-984
Author(s):  
Xin Ba ◽  
Xiao Hui Luo ◽  
Xu Feng Zhao ◽  
Yu Quan Zhu
Keyword(s):  
Hydraulic System ◽  
Tap Water ◽  
Dead Zone ◽  
Response Speed ◽  
Hydraulic Cylinder ◽  
Fast Response ◽  
Pi Control ◽  
Proportional Valve ◽  
Working Medium ◽  
Water Hydraulic

Water hydraulic components have been developed rapidly in recent years. However many problems such as low lubricity and leakage limited the performance of them, especially water proportional valves. A proportional valve- hydraulic cylinder system with tap water as working medium is chosen as object to investigate the performance of water hydraulic system. With regarding to the weaknesses of the selected 4/3 proportional valve including lag, dead zone and nonlinearity, an integral separation PI arithmetic based close-loop controller is developed. Experiments results verified the electro-hydraulic proportional system of fast response speed and high accuracy.

scholarly journals A New Control Strategy for Bi-directional DC/DC Converter in DC Microgrid

2021 ◽  
Vol 233 ◽  
pp. 01051
Author(s):  
Tianze Miao ◽  
Xiaona Liu ◽  
Siyuan Liu ◽  
Lihua Wang
Keyword(s):  
Steady State ◽  
Control Strategy ◽  
Feedback Linearization ◽  
Sliding Mode ◽  
Response Speed ◽  
Fast Response ◽  
Sliding Mode Controller ◽  
Exponential Approximation ◽  
Dc Microgrid ◽  
Simulation Results

The bi-directional DC / DC converter in DC microgrid is a typical nonlinear system which has large voltage disturbance during lead accumulator charging and discharging. In order to solve the problem of voltage disturbance, the linearization of the converter is realized by exact feedback linearization, and the sliding mode controller is designed by using exponential approximation law. The simulation results show that the method has fast response speed, strong anti-interference ability and good steady-state characteristics.

Simulation Study of the Hydraulic System of Concrete Pumping Truck Based on AMESim

2012 ◽  
Vol 170-173 ◽  
pp. 1920-1925
Author(s):  
Chang Ge Fan ◽  
Fa Lin Zeng ◽  
De Hua Li ◽  
Lei Liu
Keyword(s):  
Simulation Study ◽  
Hydraulic System ◽  
Hydraulic Cylinder ◽  
Hydraulic Shock ◽  
Buffer Effect ◽  
Concrete Pumping ◽  
Working Principle ◽  
Simulation Results ◽  
The Relationship ◽  
Buffer Structure

The working principle of concrete pumping hydraulic system was analyzed. And base on the AMESim software, the complete simulation model of concrete pumping hydraulic system was built. A simulation was made to get the dynamic characteristics curve of hydraulic cylinder velocity and displacement at some specific conditions. The simulation results indicate that the model is reasonable. Comparative simulations of the pumping hydraulic system with different positions of buffer structure were carried out to study the relationship between buffer effect and the buffer position which can be used to provide theory basis for deeper study of the hydraulic shock.

Dynamic Characteristics Simulation of Radiator Fin Blanking Machine Hydraulic System

2014 ◽  
Vol 687-691 ◽  
pp. 496-499
Author(s):  
Jie Wang
Keyword(s):  
Simulation Model ◽  
Dynamic Characteristics ◽  
Hydraulic System ◽  
Simulation Analysis ◽  
Good Condition ◽  
Hydraulic Cylinder ◽  
Simulation Software ◽  
Product Line ◽  
Leading Role

The hydraulic system of radiator fin blanking machine plays a leading role in the radiator fin production. Its performance directly affects the efficiency and quality of product line. The hydraulic system of blanking machine for radiator was composed of blanking circuit and support circuit. The hydraulic system realizes the cutting action using the reciprocating movement of the hydraulic cylinder. The hydraulic system simulation model was built by the simulation software of AMESim in this paper. Using the simulation model, the simulation analysis of the dynamic characteristics of hydraulic system were completed. The hydraulic system has been through the debugging and put into production, running in good condition.

Simulation Research on Hydraulic Support Column System Based on AMESim

2012 ◽  
Vol 229-231 ◽  
pp. 1684-1687
Author(s):  
Jun Zhu ◽  
Feng Yuan ◽  
Hong Xia Wu
Keyword(s):  
Simulation Model ◽  
Working Conditions ◽  
Hydraulic System ◽  
Hydraulic Support ◽  
Simulation Research ◽  
Column System ◽  
Actual Working ◽  
Working Principle ◽  
Simulation Results ◽  
Working Procedure

The working principle and process of the hydraulic support column system is introduced at first. The simulation model of the column system is established in the software of AMESim, and the parameters of the model are set according to the actual working conditions. The simulation curves of each working procedure are obtained, and the simulation results are analyzed. The conclusions will be essential references for the research on the entire support hydraulic system.

Kinematics and Dynamics Simulation of Feed Mechanism of Sewing Machine Based on SimMechanics

2013 ◽  
Vol 694-697 ◽  
pp. 31-35
Author(s):  
Xiao Zheng Dang ◽  
Liang Sheng Zhou ◽  
Bao Cheng Ding
Keyword(s):  
Stress State ◽  
Simulation Model ◽  
Textile Industry ◽  
Dynamics Simulation ◽  
Kinematics And Dynamics ◽  
Sewing Machine ◽  
Machine System ◽  
The Future ◽  
Simulation Results

Planner six-bar mechanism is widely used in the textile industry. In this article, feed mechanism of sewing machine is studied. The kinematics and dynamics simulation model is established for this kind of mechanism. On the basis of it, a relevant simulation is carried out through SimMechanics. Thus, the motion rules and stress state for all parts of mechanism are described vividly. The simulation results show that this method is effective and efficient when the simulation is implemented for a certain machine system. Meanwhile, it provides a foundation for the further research of the mechanism in the future.

scholarly journals Modeling and Analysis on Cushion Characteristics of Fast and High-Flow-Rate Hydraulic Cylinder

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Qiwei Lai ◽  
Liang Liang ◽  
Jing Li ◽  
Shijing Wu ◽  
Jun Liu
Keyword(s):  
Simulation Model ◽  
Flow Rate ◽  
Structural Parameters ◽  
Simulation Models ◽  
Hydraulic Cylinder ◽  
Fast Response ◽  
Industrial Applications ◽  
High Flow ◽  
High Flow Rate ◽  
Integrated Simulation

As an indispensable actuator, the hydraulic cylinder has widespread industrial applications in mechanical engineering. The cushion characteristics of hydraulic cylinder directly affect its performance and reliability, especially the one utilized in hydraulic system with fast response, high flow rate, and instantaneous super power. In order to analyze the cushion characteristics, three different simulation models are established. Furthermore, experiments concerning the pressure characteristics of hydraulic cylinder are accomplished to verify the validation of simulation models. It was found that the integrated simulation model had the highest precision and CFD model showed better pattern of cushion process compared with other models. On the basis of the integrated simulation model, plunger structure and key structural parameters were studied in detail with optimal schemes given. The conical structure, proper design of the diameter of cushion hole, and length of plunger turned out to be effective in promoting the cushion performance. The proposed simulation models and research of cushion structure have scientific and engineering value to promote the innovative development of hydraulic cylinder.

Design and Simulation Analysis of Tamper System for Multifunction-Paver

2011 ◽  
Vol 268-270 ◽  
pp. 875-880
Author(s):  
Guo Yang Wu
Keyword(s):  
Simulation Model ◽  
Vibration Frequency ◽  
Pid Controller ◽  
Simulation Analysis ◽  
Response Speed ◽  
Hydraulic Impact ◽  
Simulation Results ◽  
The Stability

In this article, the tamper system of multifunction- paver has been simulated by AMESim, and the simulation model of the tamper system of multifunction- paver has been established. The simulation results show that the hydraulic impact of the system will be decreased and the response speed of the system will be improved, when accumulator and PID controller are equipped. Simultaneously, the stability of vibrated system will go down with the increase of vibration frequency. When vibration frequency is over 20 HZ, the performance of system will go bad, and the vibration of system will be significantly enhanced.

Simulation and Experimental of Shifting Performance of Construction Machinery

2014 ◽  
Vol 889-890 ◽  
pp. 998-1002
Author(s):  
Feng Ren ◽  
Xin Hui Liu ◽  
Jin Shi Chen ◽  
Ping Zeng ◽  
Bo Liang Liu
Keyword(s):  
Mathematical Model ◽  
Simulation Model ◽  
Experimental Verification ◽  
Hydraulic System ◽  
System Simulation ◽  
Performance Characteristics ◽  
Construction Machinery ◽  
Working Principle ◽  
Pressure Changes ◽  
Amesim Simulation

The main objective to study shift buffer impact of shifting process of construction machinery.introduces the working principle of main valve and wet multi-clutch,and developing a mathematical model and AMESim simulation model. analyzes the characteristics of pressure changes during the shift, buffering characteristics and impact on the performance characteristics, and experimental verification. The results showed that: the shift hydraulic system simulation model accurately credible; good performance of the system can effectively reduce shift jerk.

Research on Influence Factors of Landing Gear Retractile Hydraulic System Performance Degradation

2014 ◽  
Vol 599-601 ◽  
pp. 409-412 ◽  
Author(s):  
Wu Feng Zhu ◽  
Zhong Yan ◽  
Qing Wei Xin
Keyword(s):  
Simulation Model ◽  
System Performance ◽  
Hydraulic System ◽  
Influence Factors ◽  
Initial Pressure ◽  
Performance Degradation ◽  
Landing Gear ◽  
Orifice Diameter ◽  
Aircraft Maintenance ◽  
Simulation Results

Simulation model of landing gear hydraulic system is built based on AMESim, several key influence factors of performance degradation of landing gear hydraulic system are analyzed, such as changes of restrictor orifice diameter, initial pressure of accumulator, viscosity and gas percentage of oil , etc. The simulation results bring valuable reference to aircraft maintenance.

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