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위상차(PDOA)를 이용한 열차 위치검지의 H/W 설계
정락교(R.G.Jeong),윤용기(Y.K.Yoon),조홍식(H.S.Cho),이병송(B.S.Lee),정상기(S.K.Chung),김영석(Y.S.Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
TOA(Time of Arrival) 및 TDOA(Time Difference of Arrival) 경우 무선국의 시간동기화를 위해서 고도의 기술을 요구하고 있으며, 시간동기오차에 따른 위치검지의 정밀도가 낮아지는 문제가 있어 이를 극복하기 위하여 위상차(PDOA)를 이용한 새로운 열차검지기법의 제안에 따른 구현을 위하여 H/W의 설계에 대하여 기술하고자 한다. 본 시스템은 전파의 전달 속도(λ)를 응용하여 기준 주파수인 15MHz를 송신 시스템과 수신 시스템의 기준 주파수와 비교하여 그 위상의 차이를 비교하여 지연 된 시간을 구한 후 이를 거리로 환산하는 시스템으로서 H/W와 S/W로 구분하여 구현.설계 되는데 본 논문에서는 H/W설계에 대하여 기술하였다.
정락교(R.G. Jeong),김연수(Y.S. Kim),윤용기(Y.K. Yoon),이병송(B.S. Lee),이병택(B.T. Lee),이정식(J.S. Lee) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
In general, a third rail current collecting shoegear is used widely in the light rail transit system, which is more efficient than overhead pantograph. Therefore, Korean standard specifications for the light rail transit prescribes for the application of it. This paper describes the development of third rail current collecting shoegears, which is suitable to Korean situation and satisfied with Korean standard specifications. Two types are developed for steel wheel AGT system and rubber tyred AGT system, and various experiments are executed.
조봉관(B. K. Cho),류상환(S. H. Ryu),정락교(R. G. Jeong) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Recently, for positioning a train and synchronizing between equipments in railway environment, the utilization of GPS(Global Positioning System) is increasing. But, the defects of GPS are pointed out. The risk of dependence on only GPS is not neglectable. Therefore, we prepare the implementation of the future railway system through the research on the safety and reliability of applying GPS to railway system.
김연수(Y. S. KIM),정락교(R.G.JEONG),임태건(T.K.LIM),이정선(J. S. LEE) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
Dynamic model of the Korea standardized rubber-tired AGT light rail vehicle, and boundary conditions between vehicle and infrastructures (running track, guidance rail) were defined to analyze vehicular vibration behaviors occurred at the worst condition. Using the commercialized software RecurDyn, vibration accelerations of car body and bogies were analyzed. and, based on the ISO standard 2631-1, the vibration characteristic test is performed in the test track. As the results, the Korea standardized rubber-tired AGT light rail vehicle satisfied the ISO standard criteria and design requirement.
안정성과 신뢰성을 고려한 무선통신기반 열차제어시스템 (Radio CBTC) 구조 및 핸드오프 방법
윤용기(Yoon Y K),정락교(Jeong R G),이병송(Lee B S),최규형(Choi K H),황현철(Hwang H C),이재호(Lee J H),곽경섭(Kwak K S) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
Communication Based Train Control System supports the easy maintenance & management and also have the capability to send more informations than the existing one but is less expensive. Tolerance against fault/failure and reliable data transmission are very important issues with this system since it has the responsibility of man"s safety. In this paper, we suggested the schemes to support the reliable transmission quality and fault safety. Also we verified through simulation.
정상기(Chung S.G.),이병송(Lee B.S.),정락교(Jeong R.G.),박성혁(Park S.H.),김국진(Kim K.J.) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study we examined the method to estimate numerically the amount of the regenerated power and the excess regenerated power produced in the DC electric power supply system for the urban light rail transit system. And their economic feasibilities are also studied. For this study DC electric power supply system is simulated and the numerical analysis of the regenerated power and the excess regenerated power are conducted. The study result on the sample system shows that the facility to consume the excess regenerated power or the inverting equipment to reuse the excess regenerated power in the electric substation is feasible economicallv.