• 전력전자학회논문지
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• 제19권6호
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• pp.511-521
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• 2014

This study proposes an electric vehicle (EV) smart panel board and its control method on the basis of charging scheduling. The proposed system consists of batteries, a three-phase battery charger, three single-phase inverters, transfer switches for electric power distribution, and a controller. The three-phase battery charger usually charges the batteries at midnight when electric rates are cheap and in light load. When the electric power consumption of the EV standard chargers connected to one phase of the power line is relatively large or when a blackout occurs, the electric power stored in the battery is supplied by discharging through the inverters to the EV standard chargers. As a result, the value of peak load and the charging electric power quantity supplied from a utility grid are reduced, and the current unbalance is improved. The usefulness of the proposed system is confirmed through simulations, experiments, and case studies.

• 한국정보통신학회논문지
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• 제25권1호
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• pp.108-114
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• 2021

무인 항공기 탑재장비 점검을 위한 통합 점검 장치는 항공기가 임무 수행을 위해 비행 전, 그리고 비행 임무를 완료하고 착륙 이후 항공기에 탑재되어 있는 장비들의 상태를 점검하기 위한 장치이다. 본 논문에서는 무인 항공기에 탑재되어 있는 전자장비에 대하여 점검자가 수동으로 장비의 상태를 점검하고, 점검 결과를 시현하는 방법과 점검자의 개입 없이 자동으로 장비의 상태를 점검할 수 있는 자동 점검 기술에 대해 기술하였다. 또한 설계된 통합 점검 장치는 점검 결과를 보고서의 형태로 출력하여 사용자가 쉽게 결과를 확인 할 수 있도록 하여 무인항공기의 고장 유무를 판단하기 용이할 뿐 아니라, 자동 점검 기능을 사용함으로써 항공기 점검자의 업무량을 줄이는데 효과적인 방법이다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.1389-1396
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• 2008

There are many studies on the ride comfort for the train from the viewpoint of passenger. But there are only a few studies on the ride comfort for engineers in the locomotive. The railway has the track conditions, such as irregularities, rail joints, turnout, level crossing, transition curves and super-elevation ramps, which cause vibrations. Generally, the ride comfort for the train is evaluated by using the vibrations. In this study, vibration accelerations have been measured in the cabin rooms of locomotives, such as DL(Diesel-electric Locomotive), DHC(Diesel Hyduralic Car) and NEL(New-Electric Locomotive) when running on the Kyoungbu conventional line. And then, their ride comforts has been analyzed and evaluated by statistical method according to UIC 513R.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.1009-1013
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• 2011

Seoul Metro Line 1 to 4 guests per day to 4.5 million people have been using the subway. This is close to the city population, 57 percent of people use the subway and found that 57 percent of people use the subway and found that this is close to the city population. Motor vehicle indoor air quality, especially of the major factors affecting is passenger's clothing, cosmetics, adhesives and formaldehyde by the action and so are able to keep. Enclosure 30ppm formaldehyde during prolonged exposure at concentrations above the nose, bronchial cough and a burning can cause symptoms. It is necessary to introduce an appropriate ventilation system. 1-4 Line Press in 2008, leaving the subway, and normally the train measured in room air quality. Measurements in 2005, $19.3{\sim}83{\mu}g/m^3$, 2008 Year ND ~ $61.7{\mu}g/m^3$ is. When congestion(rush hour) to temporarily increase the formaldehyde can result in a higher number. Automatic detection of formaldehyde and improve ventilation to a practical system, and it is necessary to chatneun. In research since 2006, Removal of formaldehyde were analyzed for the study. the passengers on the effects of formaldehyde in rush hour, the plan for increasing the ventilation through the analysis of various factors, such as electric vehicle practical ways to improve air quality have been studied.

• 한국컴퓨터정보학회논문지
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• 제8권1호
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• pp.13-19
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• 2003

유연 생산 시스템(FMS)이나 자동화 창고(AWS) 등에 이용되는 AGV(Automated Guided Vehicle)에 관하여 많은 연구가 진행 중이다. 기존의 AGV는 마그넷 테이프나 전기와이어, RF나 Laser를 가이드라인으로 사용하고 있어 가이드라인 설치와 변경 시 시간과 비용이 많이 드는 단점이 있다. 본 논문에서는 단일 컬러 CCD카메라를 가지고 50mm 황색 컬러테이프를 가이드라인으로 사용하여 주행하는 AGV를 구현하였다. 컬러테이프를 사용하므로 라인설치 및 변경 추가 시 작업 시간이 빠르고 비용이 적게 드는 장점이 있다. 구현한 AGV의 구조와 컬러 특성만을 추출하여 주행용 가이드라인을 탐색하는 영상처리 기법과 AGV주행 결과를 제시하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.435-437
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• 2003

Recently, as the road capacity reaches the limit and environmental problems becomes serious, there is gradually increased a need for railroad vehicles that are environment-friendly and have time regularity, reliability and safety. Accordingly, in addition to conventional railroad vehicles, lots of vehicles are being newly developed. We developed the hardware and software of the measurement system for on-line test and evaluation of korean hish speed train. The software controls the hardware of the measurement data and acts as interface between users and the system hardware. In this paper, we is studied for electric apparatus performance of railway vehicle using sensor. In order to this test is developed signal conversion system. Using this system, we obtained important result for pantograph voltage, battery voltage, axle speed, and running speed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 추계학술대회 논문집
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• pp.468-475
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• 2000

An air spring was accepted for rail vehicle secondary suspension to reduce and absorb tile vibration and the noise. The air spring for the electric railway was developed with domestic technology, which consisted of a cord reinforced rubber bellows, a upper plate, a lower plate and a stopper rubber spring The fatigue test was conducted in laboratory by using servo hydraulic fatigue testing system to verify the durability. And to guarantee the adaptation of this air spring, the ride comfort and the air pressure variation were measured in train test on Boondang line.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 춘계학술대회 논문집
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• pp.548-553
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• 2003

Battery supplies Each Electric device in Railway vehicles with Control Power. When Battery is overchargedjustly, the battery voltage is not satisfied with the minimum operating voltage, CVCF Inverter(SIV) is supplied with external Power supply or the other railway vehicles and start up CVCF Inverter. In this paper to improve this problem, Dead battery Starter system is proposed. When the battery voltage is not satisfied with the minimum value.turn on the Dead Battery Starter switch, and the Dead Battery Starter supplies the control power to the SIV controller from the line voltage. With this Dead Battery Starter system, the train can be operated when the battery is not proper status. Dead Battery Starter is designed by ROTEM and will be delivered to Attiko Metro Series 2.

• 대한안전경영과학회지
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• 제18권3호
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• pp.127-135
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• 2016

Korean automobile industrial is in a difficult situation because of more competitive global market and lower demand. Therefore, domestic as well as global automobile manufacturers are making greater efforts in cost reduction to strengthen the competitiveness. According to statistical data, logistics cost in domestic manufacturers is higher than advanced countries. In this study, we developed program to effectively manage standard time of procurement logistics, and confirm based on A-automobile factory data. For the purpose, we develop the system which is possible to manage standard time as well as calculate man-hour. Program is not just for calculating and managing standard man-hour, scenarios analysis function will be added to calculate benefit while introduce logistics automated equipment. In this study we propose scenario using AGV instead of electric motor while move component. In the scenario analysis, job constitution is changed, and then we use system to compare the result. We can confirm standard man-hour is reduced from 22.3M/H to 14.3M/H. In future research, it is necessary scenario analysis function, and develop algorithm with realistic constraint condition.

• 한국융합학회논문지
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• 제5권3호
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• pp.23-27
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• 2014

최근에 스마트폰과 디바이스의 무선충전에 대한 관심이 높아지고 있으며, 많은 기업들이 무선충전을 개발하고 있다. 무선충전은 앞으로 모바일기기뿐만 아니라 노트북 청소기 등 거의 모든 전자제품으로 적용 범위가 확대될 것이다. 무선충전 전기자동차도 올해 본격적으로 선을 보일 예정이다. 이렇듯 무선충전은 연관시장이 무궁무진하다. 세계 10대 유망기술에 포함되어 있는 무선충전은 매년 100% 이상 급성장할 전망이라고 한다. 하지만 그에 따라 존재하는 기술적 한계점과 인체 유해성에 대한 보안위협을 분석해 안전한 환경에서 사용할 수 있도록 해야 하고 각종 제도적 보안도 마련해야 한다. 무선충전에 대한 표준화와 보안대책요구사항은 체계적이지 않다. 본 논문은 모바일기기에서 자기공진방식의 무선충전의 보안 위협과 보안요구사항을 정의해 분석하고자 한다.