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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea Society For Power System Engineering
Journal Basic Information
Journal DOI :
The Korea Society for Power System Engineering
Editor in Chief :
Volume & Issues
Volume 7, Issue 4 - Nov 2003
Volume 7, Issue 3 - Aug 2003
Volume 7, Issue 2 - May 2003
Volume 7, Issue 1 - Feb 2003
Selecting the target year
Combustion Behavior of LPG
Park, K.H. ; So, B.D. ; Oh, S.W. ; Kim, S.Y. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 7~13
A Study on the Gas Flow in Exhaust Manifold of a Single Cylinder Diesel Engine
Lee, J.Y. ; Koh, D.K. ; Cho, K.H. ; Jang, S.H. ; Ahn, S.K. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 14~19
A diesel engine has been widely used for ship and industry power because it has many merits of high thermal efficiency, reliability and durability. However its exhaust gas is harmful to human and air environment. Reducing the hurtful exhaust gas emissions, the study of the gas flow in the inlet and exhaust manifold is in progress in the world. In this paper we modeled the gas flow as one dimensional isentropic flow to predict the gas flow in the exhaust manifold. The method of characteristics was used for the model calculation, and the calculated results were compared with the experimental ones.
Failure Analysis of Waterwall Tubes in Super Critical Boiler
Kim, B.S. ; Jung, N.G. ; Kim, D.S. ; Lee, S.H. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 20~24
Boiler is one of the most important utilities providing steam to turbine in order to supply mechanical energy in thermal power plant. It is composed of thousands of tubes for high efficient heat transfer. Water is converted to steam inside the waterwall tubes. Many chemical components dissolved in boiler water come out of itself, deposit to the tube wall surface, prohibit heat transer, raise tube metal temperature, eventually fail the boiler tubes. Several tasks such as fracture surface study, tensile test, hardness test, metallurgical test, composition analysis of sticking elements were conducted to identify the root cause of tube failure.
Study on the Evaluation of the Interfacial Strength in the Fiber Reinforced Composites
Lee, D.B. ; Moon, C.K. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 25~33
Flexible Robot Manipulator Path Design and Application of Perturbation Adaptive Control to Reduce Residual Vibration
Park, K.J. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 34~41
A method is presented for generating the path which significantly reduces residual vibration of a flexible robot manipulator and applying control theory to track the desired path. The desired path is optimally designed so that the system completes the required move with minimum residual vibration. A closed loop control theory is applied to track the planned path in the case of load variation. Specifically, it is desired that the optimally designed path has a better trajectory tracking capabilities during the residual vibration over the cycloidal path, in various cases of load. Perturbation adaptive control is used as closed loop control scheme. A planar two link manipulator is used to evaluate this method.
Development of Electronic Power Monitoring System
Park, S.J. ; Yoon, J.G. ; Kim, S.B. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 42~50
A Design of Anti-sway Controller for Container Crane
Son, J.K. ; Kwon, S.J. ; Park, H.S. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 51~59
The recent amount of container freight continuously has been increased, but the low efficiency of container crane causes jamming frequently in transportation and cargo handling at port. It is required that the working velocity and safety are improved by control of moving the trolley as quick as possible without large overshoot and any residual swing motion of container at the destination. In this paper, a LQ Fuzzy controller for a container crane is proposed to accomplish an optimal design of improved control system for minimizing the swing motion at destination. In this scheme a mathematical model for the system is obtained in state space form. Finally, the effectiveness of the proposed controller is verified through computer simulation.
A Design of Robust Vibration Control System for a Four-story Shear Structure
Yang, J.H. ; Jeong, H.H. ; Jeong, H.J. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 60~67
This paper introduces basic study how to restrain the vibration of a four story shear structure. We have modeled a four story shear structure mathematically and have identified each parameters by experiment. We have gotten a reduced nominal model through modal analyzing method and the
control theory is used in the control system design to get the robust controller. It's shown that the desirable performances is confirmed through the mathematical simulation. And a designed controller applying the
control theory shows the good performance for the impulse disturbance through the simulation results. That is, the robustness of this control system is confirmed for the ability of disturbance rejection and modeling error.
Pressure Control Characteristics of Proportional Pressure Reducing Valve
Yun, S.N. ; Ham, Y.B. ; Jo, J.D. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 68~73
The purpose of this study is to develop a new proportional pressure reducing valve and to verify the validity of a new mechanism with pressure control pin. The dynamic characteristics of the object pressure reducing valve was studied by numerical analysis of the mathematical model. Also, static and dynamic characteristics of the new pressure control valve were tested with a testing system based on the test standard.
A Study on the ALS Method of System Identification
Lee, D.C. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 74~81
A system identification is to estimate the mathematical model on the base of input output data and to measure the output in the presence of adequate input for the controlled system. In the traditional system control field, most identification problems have been thought as estimating the unknown modeling parameters on the assumption that the model structures are fixed. In the system identification, it is possible to estimate the true parameter values by the adjusted least squares method in the input output case of no observed noise, and it is possible to estimate the true parameter values by the total least squares method in the input output case with the observed noise. We suggest the adjusted least squares method as a consistent estimation method in the system identification in the case where there is observed noise only in the output. In this paper the adjusted least squares method has been developed from the least squares method and the efficiency of the estimating results was confirmed by the generating data with the computer simulations.
AE Characteristic under Tensile of Polyethylene for Low Pressure Pipe
Lee, S.Y. ; Jeong, J.H. ; Ahn, S.H. ; Nam, K.W. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 1, 2003, Pages 82~85
This study is to look at the effect for deformation of Polyethylene, on the wave forms produced by tensile test. Signals collected were then classified visually into three types according to their shapes in the time and frequency domain. Each type should contain signals which could be correlated to a certain micro failure mechanism that occurs during the tensile process. The result showed that the acoustic emission method could be effectively used for analysis of fracture mechanism in Polyethylene structures.