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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 9, Issue 4 - Dec 2012
Volume 9, Issue 3 - Sep 2012
Volume 9, Issue 2 - Jun 2012
Volume 9, Issue 1 - Mar 2012
Selecting the target year
A Study on the Design and Analysis of a Voice Coil Linear Force Motor for Hydraulic Valve
Park, C.S. ; Huh, J.Y. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 1~7
DOI : 10.7839/ksfc.2012.9.4.001
The voice coil linear force motor is a kind of a direct drive motion device that uses a permanent magnetic field and coil winding to produce force. In order to design a voice coil linear force motor, an exact calculations of the required force, the flux density in air gap and the flux pathway are needed. A conventional method can be used usually to calculate the flux density in air gap, but with this method it is needed to find a magnetic circuit revision constant. In this paper a voice coil linear force motor is designed by conventional design method and analyzed by 3D simulation program "Flux". For the prototype linear force motor, the results of the calculated by conventional design method and the analyzed by 3D simulation program are compared with the test result. Finally it is showed that the magnetic circuit revision constant which is found by comparing of the analyzed and the measured data can be used for the design of the voice coil type linear force motor to minimize the trial and error.
Analysis of Fault Diagnosis of Regenerative Braking System for Fuel Cell Vehicle with EMB System
Song, H.Y. ; Choi, J.H. ; Hwang, S.H. ; Jeon, K.K. ; Choi, S.J. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 8~13
DOI : 10.7839/ksfc.2012.9.4.008
Recently, researches about the eco-friendly vehicles such as hybrid electric vehicle, fuel cell vehicle and electric vehicle have been actively carried out. The regenerative braking system is a key technology to improve the vehicle energy utilization efficiency because it transforms the kinetic energy to the electric energy through the electric motor. This new braking system requires cooperative control between electric controlled brake and regenerative brake. Therefore, it is necessary to establish fault-diagnosis and fail-safe evaluation criteria to secure reliability of the regenerative braking system. In this paper, the failure types and causes in regenerative braking system were analyzed. The transient behavior characteristics were examined based on fault-diagnosis and fail-safe upon failure of regenerative braking system.
A Study on Frequency Characteristics of a Bender Type High-Speed Piezoelectric Pneumatic Valve
Yun, S.N. ; Ham, Y.B. ; Park, J.H. ; Lee, S.S. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 14~18
DOI : 10.7839/ksfc.2012.9.4.014
Two kinds of piezoelectric actuator are applied to the valve for controlling the direction, the flow and the pressure of the fluid. One is a stack type piezoelectric actuator which has very fast response characteristics but very tiny displacement. The other is a bender type piezoelectric actuator which has also fast response characteristics but lower than the stack type one, and has longer displacement than the stack type one. So, the bender type piezoelectric actuator has advantage to apply to the valve for controlling a large amount of flow and fast on-off operating. In this study, the bender type piezoelectric pneumatic valve for color sorter is designed and fabricated. The new type high speed piezo valve with the both side supporting mechanism for high operating frequency and high reliability is discussed for separating the foreign body from the grains. Finally, the performance characteristics of a fabricated valve are analyzed and the frequency characteristics are also discussed for substituting the conventional type solenoid actuator.
Energy Efficiency ＆ Sustainability the Cleanliness Management Role of Components and System in Automotive and Hydraulics
Hong, J.H. ; Day, Mike ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 19~25
DOI : 10.7839/ksfc.2012.9.4.019
This paper explains how eliminating contamination from the manufacturing processes will lead to better product quality and hence the need for reworking, a trouble free commissioning period and greatly improved production efficiency. All of these will reduce costs and energy usage. It will also ensure that the product is delivered to the customer in a condition that will ensure improved reliability and longer life, again reducing both energy and other operating costs. Correctly designing the contamination control measures will achieve and maintain the level of fluid cleanliness that is required by the end user. The filter is critical to cleanliness management and should be selected with the same degree of thought and consideration as for other major components. This paper explains the role that Cleanliness Management plays in the reducing the carbon footprint of systems and processes by making them perform more efficiently for longer periods. It also examines two differing ways of selecting filters to incorporate the features of newer designs, and shows how significant savings in the costs of ownership can be achieved using these approaches.
Lubrication Characteristics of Surface Textured Hydraulic Machine Components
Lee, J.O. ; Park, T.J. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 26~31
DOI : 10.7839/ksfc.2012.9.4.026
Friction reduction between sliding hydraulic machine components is required to improve efficiency and reliability of hydraulic machineries. It is recently reported that surface texturing on sliding bearing surfaces can reduce the friction force highly. In this paper, numerical analysis is carried out to investigate the effect of dimple numbers and inlet boundary pressures on the lubrication characteristics of a parallel sliding bearing using a commercial computational fluid dynamics (CFD) code, FLUENT. The results show that the pressure distribution, load capacity, dimensionless friction force and leakage with dimple number and their locations, and inlet pressures. The overall lubrication characteristics are highly affected by dimple numbers and boundary pressure. The numerical method adopted and results can be used in design of efficient hydraulic machine components.
Static Performance Diagnosis Based on Pressure Signal for a Flow Control Servovalve or Proportional Direction Valve
Kim, S.D. ; Jeon, S.H. ; Kim, I.D. ; Ham, Y.B. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 32~41
DOI : 10.7839/ksfc.2012.9.4.032
Most diagnosis methods for servo valves requires installing spool displacement sensor or flow sensor as well as pressure sensor. The measurement of flow is hard to implement and many kinds of servovalves or proportional direction valves do not have a built-in spool displacement sensor. In this study, static performances of servovalve or proportional-direction-valve are studied theoretically and a diagnosis technique, which uses only load pressure and input current signal, is assessed. An experimental setup was made based upon a personal computer and the LabVIEW graphical language. A series of diagnosis tests were performed and the analysis results showed it possible to measure the pressure gain, hysteresis and null bias in a relatively simple methodology.
Development of a mathematic model for a variable displacement vane pump for engine oil
Truong, D.Q. ; Ahn, K.K. ; Yoon, J.I. ; Lee, J.S. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 42~51
DOI : 10.7839/ksfc.2012.9.4.042
Variable displacement vane-type oil pumps represent one of the most innovative pump types for industrial applications, especially for engine lubrication systems. This paper deals with a modeling method for theoretical flow rate investigation of a typical variable displacement vane-type oil pump. This theoretical model is based on the pump geometric design and dynamic analyses. It can be considered as mandatory steps for a deeper understanding of the pump operation as well as for effectively implementing the pump control mechanisms to satisfy the urgent demands of engine lubrication systems. The developed pump model is finally illustrated by numerical simulations.
A Study on Exhaust Gas Characteristics and Engine Performance of EGR Valve Installed Engine for Development of EGR Valve Test System
Na, D.H. ; Ko, C.S. ; Seo, H.J. ; Lee, C.E. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 52~57
DOI : 10.7839/ksfc.2012.9.4.052
In this study, in order to understand contents and ranges of design for the EGR Valve test system for improving quality and performance of EGR Valve, engine performance and exhaust gas characteristic of 3L-class diesel engine was analyzed. Experimental operation of engine performance test was performed with 50% engine load and 20% and 100% opening ratio of EGR Valve. From test of performance and exhaust gas characteristic of engine, torque output of engine and temperature and pressure of inlet and outlet of EGR Valve were measured. As a result, for design of EGR Valve test system, input fluid flow of EGR Valve must be set the same amount with exhaust gas flow that was below of engine speed of 2,500 rpm, and temperature of inlet of EGR Valve must be set under about
. And the difference of temperature between inlet and outlet of EGR Valve must be over than about
. Exhaust gas of inlet and outlet of EGR Valve were under 1 bar that was not considerable, and the difference of pressure between inlet and outlet of EGR Valve were under 1 bar that could not effect on mechanical operation of EGR Valve.
A Study on PID Control Law's Realization for 2-Stage Proportional Pressure Control Valve with Analog Controller
Yun, S.N. ; Jeong, H.H. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 58~61
DOI : 10.7839/ksfc.2012.9.4.058
The customers who used the hydroulic system desire the product that has more detailed specification quickly during the industrial technology is developed. Every researcher try to reduce the developed period and to satisfy the customers' desire. Lot's of simulation software and hardware already was used to be satisfied those purpose. But these kind of equipment need a lot of cost to set up and technical knowledge to drive that system. This paper concerns about analog PID controller that can be assembled with a few resistor, condenser and optional amplifier and doesn't need technical knowledge to drive. At the first, the plant was modeled mathematically to design the analog PID controller's circuit. After that, PID controller's parameter was selected by customers' desire. Finally, the analog PID controller's circuit was assembled from the control law. The circuit's availability was confirmed by step response test in the controlled system.
Dynamic Analysis of the Valves installed in the swash plate type of Hydraulic Driving Motor
Noh, D.K. ; Jang, J.S. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 62~69
DOI : 10.7839/ksfc.2012.9.4.062
Recently, hydraulic motor is getting the spotlight. It is resulted from rapid civil engineering public works by a lot of developing countries around the world. In this study, we divided the valves which are affixed in the hydraulic motor into some parts, implemented them through computer simulation, verified validation of each component, and analyzed behavior adding driving condition. Through the analyzed results with general driving condition, we found the reason why behavior became unstable as the motor had started spinning. Through the analyzed results with tough driving condition, we verified that the valve works well with it's production purpose.
Investigation into design problems of hydrostatic slipper bearings for variable speed axial piston pumps
Hong, Y.S. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 71~78
Automatic Profile Generation System Development for a Gerotor Tooth Design
Jang, J.S. ; Yoon, Y.H. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 79~87
Reliability Evaluation Technique for the Main Pump of a Excavator
Jung, D.S. ; Kim, D.S. ; Lee, Y.B. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 88~96
Analysis Methods for the Flowrate and Volumetric Displacement of Gerotor Pumps/Motors
Kim, S.D. ; Ham, Y.B. ; Kim, D.M. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 97~104
Development of Piezoelectric Pump for Small and Precision Delivery
Ham, Y.B. ; Oh, S.J. ; Park, J.H. ; Yun, S.N. ; Kim, S.D. ;
Journal of Drive and Control, volume 9, issue 4, 2012, Pages 105~118