• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.11
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• pp.5188-5193
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• 2011

This research is for temperature control of insulating oil inside the transformer. After I designed and manufactured various systems using Peltier element, which was thermal element, and Heat pipe, which was a cooling system, without electric power. The optimum system could be made by applying them to the temperature control for the insulating oil. I could verify that the combination type of Heat pipe 100 W+ Peltier 100W has a more outstanding capacity than pure Heat pipe 300 W within 60 degrees Celsius through experiments. Through this, I verify that the method of a proper design is prominent, and make an attempt at contribution to power saving effect and more effective control of Distributing board by using this combination type.

• Journal of Drive and Control
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• v.16 no.3
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• pp.94-102
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• 2019

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.6
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• pp.1116-1122
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• 2009

ATS(Automatic Train Stop) system makes train stop when it runs over the speed limit and ensure the safe operation of train. Seoul Metro line 2 in Korea, which started its passenger service in 1982, has adopted ATS system for its signaling system. The ATS system has only a train stop function at the time of emergency, and Seoul Metro is planning to replaced them with ATC(Automatic Train Control)/ATO(Automatic Train Operation) system which can provide the dedicated speed control for headway reduction and automatic operation of train. Until all the ATS system is replaced with the new ATC system, both systems are to operate simultaneously at the same metro line. In this situation, ATS system sometimes reveals improper operation: train stops suddenly without any obstacles in front of it. These emergency stops cause interruption of passenger service, and abnormal abrasion of wheels and rail. This paper makes it clear that these interruptions are caused by EMI phenomena between ATS on-board device and ATC wayside device : Signal current flowing in AF track circuit of ATC is turn out to be a EMI source that prevent normal operation of the ATS on-board device. Although the two systems have different frequency-ranges (ATS system has frequency range between $78{\sim}130$[kHz] and ATC system has frequency range between $9.5{\sim}16.5$[kHz]), it turned out that EMI phenomena appears between the both systems. This is investigated by measuring the output signal from ATS on-board device passing over ATC wayside device. The FFT(Fast Fourier Transform) analysis of the signal reveals that AF track circuit signal is transmitted to the ATS on-board device and induce noise causing improper operation. The countermeasures to the EMI phenomena are examined in three ways; blocking EMI transmission, enforcement of EMS (Electromagnetic Susceptibility) of ATS on-board device, and blocking the EMI source. It is suggested that the practical solution be blocking EMI source temporarily, that is breaking AF track circuit signal when the trains with ATS on-board device pass over it. To this purpose, TODS(Train Occupation Detection System) is developed, and has made a success in preventing the EMI problem of Seoul Metro line 2.

• Archives of design research
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• v.14 no.1
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• pp.53-62
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• 2001

Thanks to advanced development of industrial technology, various kinds of the rapidly changing instruments are affecting our life deeply. So, just a few years are enough to regard yesterday's products as old ones due to the newly invented industrial products. Likewise, the blackboards that we face with in our actual life have been developed as completely new ones of new conception for new equipment and environmental harmony, which is completely different from the typical ones. Height-Control and Open-Shut blackboard with notice board can be adjusted to a lecturer's height, the central pan of main blackboard being controlled up and down. During writing on the board, lecturers can fix the board to their convenient position, and after writing, they can fix the height of the board to the students, convenient position. Therefore, students do not have to move their bodies left and right, or up and down, because of the lecture tables or people in front of them. The newly developed blackboard removed such an inconvenience and is suitable for today's new educational environment. In the both sides of the blackboard, general notice boards are attached to the surface, while the supplementary blackboards are fixed to inside so that they can be drawn when necessary. Considering new environments of the blackboards equipped with these diverse functions, we would like to offer the design procedure about the blackboard frames and chalk store boxes and its results.

• Transactions of the Korean Society of Automotive Engineers
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• v.4 no.2
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• pp.1-10
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• 1996

The objective of this paper is to develop a motion base for the vehicle driving simulator. Kinematic analysis are carried out to obtain maximum strokes and velocities of hydraulic actuators. Hydraulic control forces of the actuators are estimated by inverse dynamic analysis. Finally, an optimal design is performed to find attachment points of the actuators so that control forces are minimized. A control logic for the motion base is developed to make the motion base follow the given reference signals. The control logic is implemented on a digital signal processor(DSP) board.

• Bulletin of the Korean Space Science Society
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• 2006.04a
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• pp.77-77
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• 2006

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.603-604
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• 2008

This paper implemented The LED illuminance control IP based on 8bit RISC Processor. 8bit RISC Processor designed hardware interrupts, an interface for serial communications, a timer system with compare-capture-reload resources and a watchdog timer. LED Array consists of Red, Green, Blue, White and Warm White. The illuminance control IP is used to LED Board control with 8bit data.

• 제어로봇시스템학회:학술대회논문집
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• 1991.10a
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• pp.779-782
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• 1991

The design of a control language of mobile robot system for autonomous operations is explained in this paper. The on-board controller consists of one-chip microcontrollerbased system and communicates with the host computer. It decodes the received commands and controls the mobile robot. The control language is basically of interpreter type and is consisted of motion primitives and sensing primitives. The combinations of primitives are constructed for mobile robot operations.

• 제어로봇시스템학회:학술대회논문집
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• 1986.10a
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• pp.225-231
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• 1986

A design of an industrial microcomputer control system for an one-through tube boiler using oil is presented. The microcomputer system is based on standard iSBC 88/40 board. The software consist of a RTE(real time executive) and application tasks. The designed control system saves fuel and gives a more reliable over-all operation.

• Proceedings of the KIPE Conference
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• 2010.07a
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• pp.316-317
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• 2010

본 논문에서는 전기 자동차 탑재형 충전기 모듈에 대하여 설명한다. 기존의 충전기와는 달리 저압 충전부를 겸비하고 있어 저압 배터리도 동시에 충전시킬 수 있는 절연형 3.3kW 충전기 모듈이다. 전기 자동차 탑재형으로 온도와 진동에 강한 전장용 부품을 사용하여 주요 하드웨어를 구성하였으며, 유로해석 및 PCB진동해석을 통해 외부 온도변화와 진동에 강인하도록 설계하였다.