scholarly journals Hydraulic System Optimization and Dynamic Characteristic Simulation of Double Clutch Transmission

2011 ◽  
Vol 10 ◽  
pp. 1065-1070 ◽  
Author(s):  
Lei Yulong ◽  
Li Xingzhong ◽  
Liang Weipeng ◽  
Hanyong
Keyword(s):  
Dynamic Characteristic ◽  
Hydraulic System ◽  
System Optimization ◽  
Double Clutch Transmission

Research of Hydraulic Cylinders Dynamic Characteristic and Synchrocontrol on Horizontal Pipes Connector in Deep Sea

2012 ◽  
Vol 164 ◽  
pp. 421-424
Author(s):  
Zhuo Wang ◽  
Yan Jie Li ◽  
Bo Zhang ◽  
Wei Zhang ◽  
Y.Z. Zhang
Keyword(s):  
Dynamic Characteristic ◽  
Deep Sea ◽  
Hydraulic System ◽  
Pid Controller ◽  
Simulation Analysis ◽  
Hydraulic Cylinder ◽  
Horizontal Pipes ◽  
Differential Coefficient ◽  
Hydraulic Cylinders ◽  
Hydraulic Servo

The electro-hydraulic position-servo synchronization system of horizontal pipes connector was designed in order to connect two pipes in deep sea and make sure the journey of synchronization hydro-cylinders in the hydraulic system is less than 2 mm.Its transfer function of symmetric servo controlling oil-cylinder electro-hydraulic servo system were derived . Simulation analysis of its dynamic characteristic was done, and PID controller was applied on the system to regulate two hydraulic cylinder synchronization controls. In the end ,when the proportionality coefficient is Kp=0.55,integral coefficient is Ki=60,differential coefficient is Kd=0,the error of synchronic displacement was less than 0.5 mm, that achieved the request of the control system.

Research on Dynamic Characteristic of Charging Valve of the Full Hydraulic Braking System

2013 ◽  
Vol 373-375 ◽  
pp. 404-408
Author(s):  
Yue Ning ◽  
Xin Hui Liu ◽  
Jin Shi Chen ◽  
Zhan Wang ◽  
Qian Wen Li
Keyword(s):  
Dynamic Characteristic ◽  
Static Analysis ◽  
Hydraulic System ◽  
Braking System ◽  
Simulation And Experiment ◽  
Working Principle

This paper introduce the working principle of accumulator charging valve. According to the static analysis of principle and structure of the valve, the model of accumulator charging valve was established by AMESim. which simulated the charging pressure and other charging characteristics. According to the result of the simulation, some technical advices for improving the performance of the full hydraulic system are provided. Thecomparison between simulation and experiment proved that the model of the valve was accurate and reliable. The performance of the charging valve meets the request of the full hydraulic braking system exactly.

Dynamic Simulation of Hydro-Mechanical Differential Turning Hydraulic System of Tracked Vehicle

2009 ◽  
Vol 628-629 ◽  
pp. 77-82 ◽  
Author(s):  
Zhi Li Zhou ◽  
F.Y. Cao ◽  
L.Y. Xu
Keyword(s):  
Hydraulic System ◽  
Optimization Design ◽  
Structural Parameters ◽  
Dynamic Performance ◽  
System Optimization ◽  
Design Parameters ◽  
Tracked Vehicle ◽  
And Performance ◽  
The Mathematical Model ◽  
Turning System

Being an important subsystem of hydro-mechanical differential turning system of tracked vehicle, the turning hydraulic system plays the crucial role on turning and running performance of tracked vehicle. The mathematical model and simulated model of turning hydraulic system are established. The dynamic performance of different running parameters and structural parameters of certain tracked vehicle is simulated and analyzed adopting Runge-Kutta four, five step arithmetic in this paper. The theory basis of system optimization design, parameters match and performance analysis of hydro-mechanical differential turning system is provided.

Dynamic Characteristic Simulation of AT Hydraulic System

2008 ◽  
Author(s):  
Wang Shuhan ◽  
Xu Xiangyang ◽  
Liu Yanfang ◽  
Dai Zhenkun
Keyword(s):  
Dynamic Characteristic ◽  
Hydraulic System

Dynamic Optimization of the Spindle-Cutter Coupling System

2010 ◽  
Vol 42 ◽  
pp. 17-21 ◽  
Author(s):  
Xiang Sheng Gao ◽  
Yi Du Zhang ◽  
Qiong Wu
Keyword(s):  
Dynamic Characteristic ◽  
Dynamic Optimization ◽  
Optimal Path ◽  
System Optimization ◽  
Local Mode ◽  
Search Technique ◽  
Coupling System ◽  
Key Factor ◽  
Calculation Results ◽  
Gyroscopic Effects

A dynamic model of the spindle-cutter coupling system is established including the gyroscopic effects and shear deformation. Dynamic characteristic of the system is analyzed by utilizing the whole transfer matrix method (WTMM) based on the Riccati transformation, and strain energy distribution of the system is estimated. Dynamic characteristic of the system is optimized by univariate search technique. And optimal path in the system optimization is provided. According to the optimal path, a method of local mode elimination by decreasing stickout length of the milling cutter is proposed. The calculation results indicate that preload level of front bearing and rear bearing is the key factor of dynamic optimization after local mode elimination.

scholarly journals Impact of operational temperature changes and freeze–thaw cycles on the hydraulic conductivity of borehole heat exchangers

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Jan-Henrik Kupfernagel ◽  
Jan Christopher Hesse ◽  
Markus Schedel ◽  
Bastian Welsch ◽  
Hauke Anbergen ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Hydraulic System ◽  
Coefficient Of Thermal Expansion ◽  
System Optimization ◽  
Cross Sectional ◽  
Pipe Surface ◽  
Thermally Induced ◽  
Pipe System ◽  
Freeze Thaw ◽  
System Integrity

AbstractA large share of the primary energy is consumed to provide space heating. Geothermal energy offers a regenerative alternative. For reasons of efficiency and environmental protection, it is important to ensure the system integrity of a borehole heat exchanger (BHE). Previous investigations have focused on the individual components of the BHE or on the grout and pipe systems’ integrity. This study focused on the analysis of the hydraulic system integrity of the complete subsoil–grout–pipe system as well as possible thermally induced changes. For this purpose, a pilot-scale experiment was built to test a 1-m section of a typical BHE under in situ pressure, hydraulic and temperature conditions. During the tests the hydraulic system permeability of the soil and the BHE was measured continuously and separately from each other. In addition, the temperature monitoring array was installed in a 50-cm cross-sectional area. Significant temperature-related fluctuations in the sealing performance could be observed. Hydraulic conductivity limits required by VDI 4640-2 (Thermal use of the underground—ground source heat pump systems, 2019) were exceeded without frost action. The succeeding application of freeze–thaw cycles further enhances the system permeability. The study shows that the thermally induced effects on the system integrity of the BHE are larger and more significant than the subsequent frost-induced effects. The hydrophobic character of the high-density polyethylene (PE-HD) pipes as well as its high coefficient of thermal expansion seem to be the main points of weakness in the system. Optimization research should focus on the interface connection between grout and pipe, whereby hydrophilic pipe materials such as stainless steel or aluminum should also be considered as well as manipulation of the pipe surface properties of PE-HD.

Hydraulic System Optimization

2021 ◽  
pp. 677-692
Author(s):  
Sandie B. Nielsen ◽  
Claus M. Hvenegaard ◽  
Otto Paulsen ◽  
Søren Draborg
Keyword(s):  
Hydraulic System ◽  
System Optimization

scholarly journals A Systematic Design Approach of Gripper’s Hydraulic System Utilized in Offshore Wind Turbine Monopile Installation

2018 ◽  
Author(s):  
Amir R. Nejad ◽  
Lin Li ◽  
Wilson Ivan Guachamin Acero ◽  
Torgeir Moan
Keyword(s):  
Power System ◽  
Wind Turbine ◽  
Dynamic Model ◽  
Hydraulic System ◽  
Global Analysis ◽  
System Optimization ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Effect Analysis ◽  
Load Effect

This paper presents a systematic approach for designing the hydraulic mechanism as a part of the gripper system employed in offshore wind turbine monopile installation. Traditionally, such equipments used in marine operation are designed based on deterministic approach, selecting actuators and power pack by applying a safety margin which is not explicitly derived from a systematic load/load effect analysis, or a reliability based method. The method in this article offers a systematic way of designing the hydraulic power system, actuators and supporting structure to overcome extreme and fatigue loadings during operation. The design starts with a global analysis and modelling of monopile and installation vessel. The forces and motions from global analysis are then employed for designing hydraulic actuators and power system. A dynamic model of hydraulic system is built to analysis dynamic response in hydraulic system. The results from this local dynamic model can be used in power management and system optimization. The proposed method is a step forward to apply reliability-based design on mechanical components in marine applications through a systematic long-term load and load effect analysis.

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