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미니트램 차량의 설계/제작을 위한 열 성능 및 내부 온열환경 평가
정락교,김백현,김수호,강석원 한국전산유체공학회 2017 한국전산유체공학회지 Vol.22 No.4
Mini-tram (or Personal Rapid Transit) is a new transportation system that can provide direct transport services to destinations without time delays. The mini-tram vehicle is autonomously operated and powered electrically. Wired and wireless power transfer methods based on Electric Vehicle fast charging standards or inductive power transfer technology, are options for powering the mini-tram vehicle. Most importantly, the thermal management strategies to maintain an operating temperature as well as to provide optimized thermal comfort to passengers are very challenging, and these issues are related to reliability and system performance. In this study, computational fluid dynamics simulations were carried out to assess the thermal performance of the vehicle. As a result, high thermal loads, close to the critical point permitted for safe operation, were observed for the condenser of the air-conditioner, but it was also demonstrated that thermal loads reduced by 26 % were achieved by additional consideration of the air intake holes in front of a vehicle. In addition, the predictions of thermal comfort under hot summer and cold winter conditions were performed by evaluation based on the ‘predicted mean vote’ and ‘predicted percentage of dissatisfied’ indices.
정락교,김연수,박성혁,이병송,최규형 한국철도학회 2000 한국철도학회논문집 Vol.3 No.4
In general, a third rail current collecting shoegear is widely used in the light rail transit system since it is more efficient and economical than an overhead pantograph. Therefore, its specification is prescribed in the Korean standard specifications for the light rail transit for its applications. This paper describes the development of the third rail current collecting shoegears which is suitable to Korean situation and satisfactory to the Korean standard specifications. Two types are developed for the steel wheel and the rubber tyred AGT system, and various experiments are executed. It is found that performance of the third rail current collecting shoegear developed is proved acceptable.
무선통신을 이용한 철도차량의 위치 및 속도 검지시스템 설계
정락교,윤용기,이병송,조흥식,정상기,김영석 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
This paper proposes a new position detection method for train speed control using the PDOA(Phase difference of Arrival), This method aims to apply to AGT(Automated Guide way Transit) systems, operated with driverless, So It is absolutely required to range, calculate and decide a train position precisely, This system consists of VRS (Vehicle Radio Set) and WRS(Wayside Radio Set) The VRS transmits a wireless signal to the WRS, the controller calculate a straight line with the PDOA. Next step calculate an exact position using track DB<br/> This paper includes the concept, configuration, analysis and results of this method
정락교,김백현 대한전기학회 2012 대한전기학회 학술대회 논문집 Vol.2012 No.4
최근 국제적으로 이슈가 되고 있는 환경변화에 대응하기 위한 "지속가능한 교통수단"으로서 역할이 재조명되고 있다 환경문제와 관련하여 지구온난화와 고유가를 대비하기 위해 이산화탄소 억제가 인류의 중요한 이슈로 대두됨에 따라 신재생에너지, 자전거 등을 포함한 활성화 방안과 더불어 도심지역의 자동차 억제를 위한 새로운 대체수단의 제공이 필요한 시점이다. 이에 미래지향적이고 첨단 기술을 접목한 PRT(Personal Rapid Transit)의 구현 활용을 위한 연구개발을 진행하고 있는 중이다. 이에 시스템의 구동방식에 따라 시스템의 특징뿐만 아니라 인프라 구조 등의 변화를 가지고 올 수 있으므로 경제성, 기술적 장단점을 분석해 볼 필요가 있다. 따라서 본 논문에서는 LIM(In Track/On Board) 및 회전형 전동기의 적용성 측면에서 시스템 개념 또는 초기 전체시스템개발차원에서 특성을 비교하여 선정하는데 필요하다고 판단되며 초기 시스템 검토를 위한 참고자료로 활용될 수 있을 것이다.
정락교(Raggyo Jeong),김연수(Yeonsu Kim),박성혁(Sunghyuk Park),목진용(Jinyong Mok),이정식(Jungsik Lee) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
In the design of the light rail transit which is more reliable and economical, it is essential to develope a efficient third rail system. Especially, the analysis for the conductivity of conduct rail and the wear of collecting shoe is the first step of its development. In this paper, experiments for conductivity in conductor rail, wear in collecting shoe were performed respectively as different materials of conductor rail and current collector. Noise level and interruption, wear and contact resistance of collecting shoe were proposed as design parameters for the development of this system. Experimental equipment and methods of design parameter stated above were proposed, which is expected that analyzed results will be used as a basic data for the development of the system.