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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Drive and Control
Journal Basic Information
Journal DOI :
Korea Society of Fluid Power & Construction Equipments
Editor in Chief :
Volume & Issues
Volume 11, Issue 4 - Dec 2014
Volume 11, Issue 3 - Sep 2014
Volume 11, Issue 2 - Jun 2014
Volume 11, Issue 1 - Mar 2014
Selecting the target year
Modeling and Performance Investigation of Forklift Transmission Control Valve System
Truong, D.Q. ; Ahn, K.K. ; Yoon, J.W. ;
Journal of Drive and Control, volume 11, issue 3, 2014, Pages 1~6
DOI : 10.7839/ksfc.2014.11.3.001
In forklifts, the machine performance is largely depended on the transmission performance. The aim of this paper is to develop a complete model of transmission control valve (TMV) system of a typical forklift using AMESim simulation tool. By using the developed TMV model, it becomes easy to investigate the system concept, working principle, and performance. In addition, an optimization on the TMV structure can be achieved by using this model with tunable parameters. Simulations have been carried out in a comparison with the actual experiments to verify the model.
A Ship Berthing System Design by Cooperating with Tugboats and Dampers
Tran, Anh-Minh D. ; Ji, S.W. ; Kim, Y.B. ;
Journal of Drive and Control, volume 11, issue 3, 2014, Pages 7~13
DOI : 10.7839/ksfc.2014.11.3.007
Everyday about 90% of cargos are delivered by ships, and thousands of vessels enter and depart the international container harbors such as Shanghai, Singapore, Hong Kong, Busan, Rotterdam, etc. Maneuvering at harbor is known as the most sophisticated and difficult procedure, because the effectiveness of actuators during low speed berthing is reduced. In this paper, a new berthing method is discussed. Tugboats are combined with damper systems to ensure safe berthing. A mathematical model describing the interaction between unactuated ship, tugboats and damper systems is presented. An optimal controller is designed to maneuver the ship without oscillation and overshoot. MCL (Marine Cybernetics Lab) model ship is used to evaluate the efficiency of the proposed approach through MatLab simulation.
Development of Drifter`s Hydraulic System Model and Its Validation
Noh, D.K. ; Jang, J.S. ; Seo, J.H. ; Kim, H.S. ; Park, S.H. ;
Journal of Drive and Control, volume 11, issue 3, 2014, Pages 14~21
DOI : 10.7839/ksfc.2014.11.3.014
The goal of this study drifter is to understand the operating mechanism of a drifter and to suggest a reliable analysis model which can be used for evaluating the drifter`s performance from the viewpoint of impact frequency and energy. For this, the working principle of drifter and functions of its main components were analyzed, and a simulation model was developed based on the analysis. The model was validated using experimental tests on a test-bench. A comparative study of simulation and experimental results indicated that the suggested model accurately represents the real drifter system in terms of impact frequency and impact energy per blow.
A Study of Stability for Field Robot using Energy Stability Level Method
Nguyen, C.T. ; Le, Q.H. ; Jeong, Y.M. ; Yang, S.Y. ;
Journal of Drive and Control, volume 11, issue 3, 2014, Pages 22~30
DOI : 10.7839/ksfc.2014.11.3.022
In this research, the energy stability level method is used for examining the stable state of Field Robot under effects of swing motion, at particular postures of manipulator, and terrain conditions. The energy stability level is calculated by using the dynamic models of Field Robot, subjected to the concept of equilibrium plane and support boundary. The results, simulated by using computing program for estimating the potential overturning of Field Robot, supply useful predictions of stability analysis for designers and operators.
Development of a Multi-Absorbing Wave Energy Converter using Pressure Coupling Principle
Do, H.T. ; Nguyen, M.T. ; Phan, C.B. ; Lee, S.Y. ; Park, H.G. ; Ahn, K.K. ;
Journal of Drive and Control, volume 11, issue 3, 2014, Pages 31~40
DOI : 10.7839/ksfc.2014.11.3.031
This paper proposes a multi absorbing wave energy converter design, in which a hydrostatic transmission is used to transfer wave energy to electric energy. The most important feature of this system is its combination of the pressure coupling principle with the use of a hydraulic accumulator to eliminate the effects of wave power fluctuation; this maintains a constant speed of the hydraulic motor. Tilt motion of a floating buoy was employed as the power take-off mechanism. Furthermore, a PID controller was designed to carry out the speed control of the hydraulic motor. The design offers some advantages such as extending the life of the hydraulic components, increasing the amount of energy harvested, and stabilizing the output speed.
Analysis Model Development and Sensitivity Analysis on Design Parameters of the Neutral Valve for HST
Kim, D.M. ; Jang, J.S. ; Kim, S.C. ;
Journal of Drive and Control, volume 11, issue 3, 2014, Pages 41~46
DOI : 10.7839/ksfc.2014.11.3.041
The neutral valve for controlling the HST is one of the important valves for the vehicle control. Neutral valve takes a role of blocking or transmitting power to the vehicle. The operating principle of the neutral valve was developed through the analysis model. We also investigated the logical validity by analyzing the results of the analysis model. The analysis model was developed by using SimulationX witch is commercial software. The number of holes in the piston was selected as a variable initial compression of the spring, and the magnitude of the pressure pulsations and the diameter of the orifice for the sensitivity analysis were performed to design sensitivity analysis of the neutral valve.
Experimental Analysis of Clutch-Fill Parameters for Automatic Transmission
Jung, G.H. ; Park, D.H. ;
Journal of Drive and Control, volume 11, issue 3, 2014, Pages 47~54
DOI : 10.7839/ksfc.2014.11.3.047
Clutches are an integral part of the automatic transmission for changing gears. Modern automatic transmissions make extensive use of wet multiple-disc clutches employing hydraulic actuation mechanism with electronic control. Although nowadays, highly advanced shifting algorithm implements the superior shift quality and transmission efficiency, its performance should be based on smooth, reliable engagement with a reasonably durable friction material as well as stable clutch piston dynamics. Particularly, clutch filling control is the crucial part of shifting process because only the open-loop control is available due to the lack of measurement. In this paper, the effect of clutch-fill control parameters on clutch piston dynamics is experimentally investigated by using clutch piston test equipment which enables the clutch piston to actuate similar to real shifting conditions. The experimental analysis results can be expected to be utilized for the calibration of proportional solenoid valve as reference current profile data in vehicle test.