• Proceedings of the KSR Conference
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• 2001.10a
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• pp.247-252
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• 2001

In this study, an aluminum electric motor car with a modular front end made of composite materials is numerically evaluated applying the standard specifications for the urban EMU(Electric Multiple Unit) train. Structural analyses under compressive load, torsional load and free vibration satisfy the standard specifications, but analysis under normal load doesn't. By the way, the aluminum bodyshell of the car except the modular front end is almost same to that of the Korean standard EMU, which satisfy the standard specifications. It is presumed that the stiffness of the modular front end made of composite materials haves some influence on the strength of the aluminum bodyshell.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.12
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• pp.887-895
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• 2018

This paper presents a braking model that can be used to design the safety distance of a train control system and a train braking system to increase the volume of traffic. For the braking model, a train set (electric multiple unit composed 6 cars) was tested. The factors that can affect the braking characteristics include the friction coefficient, braking pressure, and regenerative braking. The braking pressure was classified into service and emergency braking and reflected the characteristics of the vehicle. The external force acting on the running railway car was tested in accordance with KS R 9217, and the running resistance of the train is presented in the form of a polynomial. The dynamic behavior of the train running on a straight flat line was simulated using UM 8.3. The results were validated with experimental data, and the results were reasonable. With the validated model, a stopping distance was determined according to the initial braking speed and compared with the deceleration braking model. In addition, a safety distance for the train control system could be changed according to the frictional coefficient limits. These results are expected to be useful for analyzing the dynamic behavior of trains, and for analyzing various railway environments and improving the braking performance.

• Proceedings of the KIEE Conference
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• 2006.10d
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• pp.241-243
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• 2006

To supply the materials the right time, and the right place, it is required some information maintenance system to manage this procedure effectively. In this paper, we represent the standard products classification for EMU and the materials maintenance information system to manage the parts used EMU maintenance efficiently. The standard material classification is matched to G2B code made by the Supply Administration. The implemented material information system can perform various functions such as the inquiry of the number of stocks, the demand of the materials, and etc.

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.370-375
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• 2001

This paper is to suggest reliability modeling and analysis method of Electric Multiple Unit (EMU). It is necessary to identify subsystem/equipments of EMU and functional interfaces between subsystems in order to carry out reliability modeling of EMU properly. After identifying subsystem/equipments and functional interface, reliability allocation is performed using ARINC method. Reliability target of system/subsystems is verified in revenue service during the proper periods.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.220-224
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• 2005

EMU(Electric Multiple Unit) operated in local area is mostly consist of moving system on the rail and the traction motor drives the gear and wheel with the mechanical propulsion force. Most of countries are interested in Magnetic Levitation Vehicle for the transportation system on next generation and they have been studying about it continuously. Thus this paper is studied the Linear Induction Motor as the propulsion equipment of Magnetic Levitation Vehicle

• Proceedings of the KSR Conference
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• 2001.05a
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• pp.200-206
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• 2001

In the standard specifications for the urban EMU(Electric Multiple Unit) train, there are several items to ensure safety against accidents. The 21th -23th items have much relation with the crashworthiness of the urban EMU train. In this study, the rubber- tired AGT(Automated Guide-way Transit System) under development by KRRI is numerically evaluated in a crashworthy point of view by applying the above crashworthiness items. The numerical results show the detail design of the AGT satisfies the 22th and 23th items. But the design is recommended to adopt mechanical fuses to reduce the impact accelerations with respect to the 21th item.

• Proceedings of the KIEE Conference
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• 1995.07b
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• pp.766-768
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• 1995

This paper presents the applied example of "A" city about optimum of chemicals imjection rate. The water treatment plant of "A" city make raw water into drinking water according to the injection of PAC, Alkali and chlorine. Computer performs multiple regression analysis about preoperation data, DCS has been done chemicals optimun control.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2004.04a
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• pp.30-33
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• 2004

This paper suggested that the technical specification of tilting train EMU for speed up on existing lines. High speed strategy of existing lines are the modification of railway system which are made on cant, lengths of transition curves, the catenary system and train system. Tilting technology is more useful a strategy for speed increases on existing lines with low investment needed. We performed a feasibility study which is considered out real track conditions and designed propulsion and braking system of tilting EMU system.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.64 no.5
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• pp.812-816
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• 2015

Recently, various monitoring systems have been proposed to detect interaction performance between trains and infrastructure, as well as, various techniques to improve the accuracy and performance of such inspection equipment in high speeds. Especially, it is important to predict electric noise of high speed trains due to its effect on detection system accuracy. In this paper, we analyze various types of electrical noise in electric vehicles to improve the accuracy of the detection module of the inspection car. In detail, analysis of electric noise of high speed railway is performed as a function of speed based on field tests that were carried out by HEMU-430X (Highspeed Eletric Multiple Unit - 430 km/h eXperiment).

• Journal of Digital Convergence
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• v.17 no.12
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• pp.503-508
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• 2019

In recent years, among the IoT products that are used in various ways in everyday life, motorized products are increasing. This study aims to develop a microcontroller unit that can easily control multiple motors and develop an application that makes use of this microcontroller unit. The basis of the hardware developed by the research was the Arduino board, and to it, the Bluetooth module, Zigbee module, and a motor driver were connected. To control the device, an application was designed. The final microcontroller unit and its application may be applied to electric curtains, electric blinds, robots, and other various IoT products. Further research will lead to hardware development that can control various types of motors other than stepping motors.