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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
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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
A Measurement and Analysis of Combustion Pressure in DI Diesel Engines Using the PXI and LabVIEW
Jung, S.H. ; Koh, D.K. ; Ahn, S.K. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 5~11
Emission After-Treatment System of Model Gas Turbine Using Catalyst
Lee, Y.H. ; Lee, J.S. ; Bae, D.S. ; Lee, D.H. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 12~17
The purpose of this study is to observe the purification characteristics of NOx, CO and HC in various catalysts and excess air ratio conditions. For this purpose, we installed various catalysts on the back stream of the coaxial diffusion burner with swirler. As the result, in the case of NOx, Pt-Rh catalyst shows very high value that is more than 90%-conversion efficiency without the relation with the excess air ratio. After excess air ratio of
, it shows that the conversion efficiencies were more than 80% in the every Pt catalyst in the view of conversion of every exhaust with changing of the excess air ratio.
Development of Mechanical Properties of Ni-based Superalloy for Land-based Gas Turbine
Chun, C.H. ; Kim, G.M. ; KIM, D.S ; Jang, J.C ; Kim, J.C. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 18~22
A Study has been made to investigate the effects of hot isostatic press(HIP) and post-HIP heat treatment on microstructures and mechanical properties of Ni-based single crystal superalloy CMSX-4. HIP process was found to heal and close micropores significantly, but did not affect the morphologies of. The elimination of as-cast micropores obtained by HIP process resulted in improved stress-rupture lives of Ni-base single crystal superalloy by 185%.
Identification of Noise Source from Main Steam Line in Power Plant
Sohn, M.S. ; Lee, J.S. ; Lee, S.K. ; Lee, W.R. ; Lee, S.K. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 23~28
In heavy nuclear power plant, high energy through main steam line is provided to turbine that generate the electric power. Since plant had generated power, high noise has been occurred. Noise make equipments and work environment worse. For finding out the location and the cause of making noise, noise was measured along main steam line at open/close test of Main Steam Isolation Valve (MSIV hereafter). As the result, it was identified that the vortex shedding in the cavity of MSIV is main noise source. The profile change of MSIV seat ring was proposed as the method of noise reduction. After filletting MSIV seat ring, the noise level reduced
compared before the change of profile.
Optimum Design of Diameters of Marine Propulsion Shafting by Binary-Coded Genetic Algorithm and Modal Analysis Method
Choi, Myung-Soo ; Moon, Deok-Hong ; Seol, Jong-Ku ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 29~34
Genetic algorithm is a optimization technique based on the mechanics of natural selection and natural genetics. Global optimum solution can be obtained efficiently by operations of reproduction, crossover and mutation in genetic algorithm. The authors developed a computer program which can optimize marine propulsion shafting by using binary-coded genetic algorithm and modal analysis method. In order to confirm the effectiveness of the developed computer program, we apply the program to a optimum design problem which is to obtain optimum diameters of intermediate shaft and propeller shaft in marine propulsion shafting. Objective function is to minimize total mass of shafts and constraints are that torsional vibration stresses of shafts in marine propulsion shafting can not exceed the permissible torsional vibration stresses of the ship classification society. The computational results by the program were compared with those of conventional design technique.
A Study of Heat Transfer Phenomena in a Sensor Tube of a Mass Flow Controller
Lee, S.K. ; Kim, Y.S. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 35~39
In this paper, the heat transfer phenomena in the sensor tube of a mass flow controller(MFC) were studied by experiments. In the sensor tube of MFC, the difference of temperature between inlet and outlet was necessary for calculating the mass flow rate. Therefore, the relations of flow rate, generated heat by heating wire, sensor location and tube thickness were investigated to find the optimized condition. Based on this study, static and dynamic characteristics of sensor can be used for mass flow controller.
Position and Force Simultaneous Trajectory Tracking Control with a Pneumatic Cylinder Driving System
Cho, M.S. ; Jang, J.S. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 40~47
In this study, position and force simultaneous trajectory tracking control apparatus with pneumatic cylinder driving system is proposed. The pneumatic cylinder driving system that consists of two pneumatic cylinders constrained in series and two proportional flow control valves offers a considerable advantage as to non-interaction of the actuators because of the low stiffness of the pneumatic actuators. The controller applied to the driving system is composed of a non-interaction controller to compensate for interaction of two cylinders and a disturbance observer to reduce the effect of model discrepancy of the driving system in the low frequency range that cannot be suppressed by the non-interaction controller. The experimental results with the proposed control apparatus show that the interacting effects of two cylinders are eliminated remarkably and the proposed control apparatus tracks the given position and force trajectory accurately.
Robust Control System Design for an AMB by
Chang, Y. ; Yang, J.H. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 48~53
This paper deals with the control of a horizontally placed flexible rotor levitated by electromagnets in a multi-input/multi-output (MIMO) active magnetic bearing(AMB) system. AMB is a kind of novel high performance bearing which can suspend the rotor by magnetic force. Its contact-free manner between the rotor and stator results in it being able to operate under much higher speed than conventional rolling bearings with relatively low power losses, as well as being environmental-friendly technology for AMB system having no wear and no lubrication requirements. In this MIMO AMB system, the rotor is a complex mechanical system, it not only has rigid body characteristics such as translational and slope motion but also bends as a flexible body. Reduced order nominal model is computed by consideration of the first 3 mode shapes of rotor dynamics. Then, the
control strategy is applied to get robust controller. Such robustness of the control system as the ability of disturbance rejection and modeling error is guaranteed by using
control strategy. Simulation results show the validation of the designed control system and the modeling method to the rotor.
A Study on Swing Motion Control System Design for the Spreader of the Crane
Chae, G.H. ; Kim, Y.B. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 54~60
In general, the swing motion of the crane is controlled and suppressed by activating the trolley motion. In this paper, we suggest a new type of anti-sway control system of the crane. In the proposed control system, a small auxiliary mass(moving-mass) is installed on the spreader and the swing motion is controlled by moving the auxiliary mass. The actuator reaction against the auxiliary mass applies inertial control forces to the container to reduce the swing motion in the desired manner. In this paper, we apply the
based control technique to the anti-sway control system design problem. And the experimental result shows that the proposed control system is shown to be useful and robust to disturbances like winds and initial sway motion.
Vehicle Steering Characteristics Simulation by a Driver Model
Lee, J.S. ; Baek, W.K. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 61~68
Steering characteristics is an important factor in the evaluation of vehicle quality. To estimate steering characteristics in the vehicle conceptual design stage, vehicle dynamics simulation methods are very efficient. However, it is often difficult to simulate vehicle dynamics for the specific driving scenarios in open-loop driving environment. An efficient driver-in-the-loop vehicle model will be efficient for this job. A good tire model is also very important for the accurate vehicle dynamics simulation. In this research, a driver model is used to simulate vehicle steering dynamics for a 8-dof vehicle model with STI(Systems Technology, Inc.) tire model. For the demonstration of this model, a SUV(sports utility vehicle) and a sedan were simulated.
A Study of Flow Characteristics using Reynold's Equation on Mass Flow Controller Actuated by Piezoelectric Material
Lee, S.K. ; Kim, Y.S. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 69~73
In this paper, the relation between displacement of piezoelectric disk and electric field was proposed. From Navier-Stokes equation and Reynold's equation, the relation between flow and gap of plate was determined. This models were further verified by experiments. Based on theoretical study and experimental verification, the proposed model between flow rate and voltage can be used in the design of mass flow controller in gas supplying system.
A study on Brazing Interfacial Properties of
Seo, S.Y. ; An, B.G. ; Lee, K.Y. ;
Journal of the Korea Society For Power System Engineering, volume 7, issue 3, 2003, Pages 74~79
) and Al 6061 were brazed by using Al-12wt% Si filler metal in a high vacuum environment. The interfacial microstructure and mechanical properties of the joints were investigated. The results obtained were as follows. (1) The maximum tensile strength of 54Mpa was acquired at the processing conditions of high vacuum (
and 10min, but this condition will not be used in the industrial area due to high evaporation of Al alloy composition. (2) Reaction products for holding time and brazing temperature worked as stress relieve layer and the fractures after the mechanical properties test were occurred to the ceramic side or reaction layer. (3) The glancing angle X-ray diffraction analysis for the reaction product of
6061 were processed. the joint strengths were low due to existed