• International Journal of Railway
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• 제5권4호
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• pp.167-174
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• 2012

As wireless power transfer (WPT) technologies emerge in a wide range of applications including public transportation, many expect that applying the technology to the current railway systems will bring positive effects to current railway systems. In this paper, we introduce design methodology of a WPT system for railway application. Fundamental principles of magnetic fields and a WPT circuit are first analyzed, and advantages and efficiency of a possible train system are discussed. It then examines other significant factors such as performance requirements and EMC criteria to design a wireless train system.

• 한국철도학회지
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• 제6권2호
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• pp.9-18
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• 2003

This paper discuss advanced safety in the railway signaling system. The specified methods and HAZOP about Hazard identification and analysis of railway signalling system were studied, and loss analysis and ALARP model in order to calculate safety as a standard capacity were proposed. It was also resulted from Hazard identification, analysis and evaluation by applying advanced safety to the railway signalling system.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 추계학술대회 논문집
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• pp.82-87
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• 2005

The new technology with Wireless LAN (WLAN) is implemented to the railway system, which is attached importance to safety and reliability. Railway control system based on WLAN that is called CBTC (Communication Based Train Control) is being developed by the advanced nations in this field and The system is applied to a new train line and a renovation for outworn equipment. The CBTC system has many merits about increase of capacity, reduction of headway and cost reduction etc.. Therefore, that is come into spotlight to the advanced railway company and the companies have being developed the system. So, we have developed the CBTC system for standardization and localization of the railway signal system.

• KIEE International Transactions on Power Engineering
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• 제5A권3호
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• pp.235-243
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• 2005

Line constants of the catenary system are estimated. The harmonic current that the Korean Train Express (KTX) injects into the catenary is measured to precisely analyze the harmonic effects. The Korean high-speed railway system is modeled by estimated and measured results. The system model is applied for predicting the harmonic effects. The simulation results from the system model are compared to field test data concerning the total harmonic distortion (THD). The reliability of the system model is verified.

• 한국ITS학회 논문지
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• 제9권4호
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• pp.113-122
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• 2010

지하철의 유지보수성, 경제성 등의 문제점을 보완하기 위하여 현재 차세대전동차 시스템 개발연구가 활발히 진행되고 있으며, 이는 지하철의 첨단성, 승객편의성, 시스템 안전성 및 신뢰성확보를 목적으로 하고 있다. 이러한 시점에서 차세대 전동차 개발이 지하철 이용자들에게 미치는 영향에 대한 사전연구가 필요하며, 본 연구에서는 서울시 지하철 1~8호선 이용자를 대상으로 차세대전동차 시스템 도입에 따른 지불의사금액 및 결정요인을 도출하였다. 차세대전동차 시스템 도입에 따른 이용자의 편의성(운행속도, 승차감, 안전성, 쾌적성, 보안성, 정보성)에 대한 지불의사금액 도출을 위하여 Price Sensitivity Method(PSM)를 적용하였으며, 지하철 이용자를 대상으로 차세대전동차 도입시 발생하는 효과에 대한 정의를 상세히 설명하고, 추가지불의사금액(willingness to pay) 및 결정요인을 조사하였다. 분석결과 차세대전동차 시스템 도입에 따른 지불의사금액의 범위는 148원~161원이 도출되었으며, 지불의사금액 결정요인은 지하철 이용자의 "성별", "이용횟수", "쾌적성 만족도", "보안성 만족도"가 영향을 미치는 것으로 분석되었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(II)
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• pp.229-234
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• 2003

In this paper, the elemental components and improving purpose in advanced safety management system are reviewed to cope with a railway fire accident. And a considering procedure(V-cycle) of long-term plan for railway fire safety improvement is proposed. For the purpose of preventing recurrence of accident, items which have to be considered in the course of accident investigation and cause analysis are presented according to the stage of investigation activity.

• 전기학회논문지
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• 제56권9호
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• pp.1589-1595
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• 2007

This paper suggests the advanced reliability assessment tool for railway signaling Hot-Standby sparing system. Existing reliability assessment for Hot-Standby sparing system controller is done by using single module mean failure rate based on approximated Hot standby sparing system function. Although approximated Hot standby sparing system function can be applied to various Hot standby sparing system, however, it is not able to reflect the exact system structure. In this paper, we suggest the advanced reliability function by identifying changeover-related failure factors and common failure mode which is not considered in existing approximated Hot standby sparing system reliability function via developing Hot standby sparing system model for railway signaling and applying FMECA to this model. Also. we compare reliability assessment results for model system to reliability assessment for existing system.

• International journal of advanced smart convergence
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• 제12권1호
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• pp.208-219
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• 2023

Recently, as mega-urbanization progresses, urban logistics centered on large cities is growing rapidly, and logistics transportation is increasing due to the lack of logistics infrastructure and the operation of a delivery system using cargo trucks in the city center. being cited as a cause. In order to solve this problem, domestic researchers are conducting research on the development of " Urban Underground railway Logistics System" that minimizes the initial infrastructure construction cost by utilizing the existing urban railway facilities in the city. Therefore, this paper analyzed the usage environment of the actual urban railway station to which the system will be applied in order to derive candidates for the test bed selection of "Urban Underground railway Logistics System". The evaluation criteria for test bed candidate role selection were established, and the candidate group derived from the Brown & Gibson model was used to evaluate the candidate group and derive the candidate role. A review of the results was conducted to contribute to the establishment of a test bed for the " Urban Underground railway Logistics System" under development.

• 한국철도학회논문집
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• 제14권2호
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• pp.174-180
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• 2011

본 논문은 철도의 발전과 함께 철도문화유산에 대한 중요성이 점차 인식됨에 따라 현재 우리나라의 철도문화유산 지정제도 및 철도문화재현황을 검토한 후 향후 개선방안을 제시하고 함에 그 목적이 있다. 이를 위해 철도문화유산의 보존과 관리체계가 잘 되어 있는 일본의 사례 분석을 통하여 향후 우리나라에서의 철도유산을 어떻게 보존하여야 할 것인가에 대한 방향성을 정립하고자 하였다. 일본은 과거 철도가 국가 소유였을 때와 민영화 이후에는 많은 다양한 변화가 있었고, 철도를 직접 운영하고 건설하는 기관에서의 철도 문화를 체계적으로 관리하고 있어 우리에게 많은 시사점을 주고 있다. 이에 본 연구에서는 한국과 일본 간의 철도문화유산제도를 비교해 보고 그 시사점을 도출하여 향후 우리나라 철도문화유산의 보존을 위한 보다 체계적이고 합리적인 방안을 제안하고자 하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 추계학술대회 논문집
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• pp.1010-1015
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• 2005

Recently, advancements in railway system and IT have enabled automatic or driverless train. Futhermore, developed countries have been tried to develope unmaned operation system for railway system. To apply manless operation in railway system, development of simulator for manless operation is required. The advantage of the simulator is in that it makes it possible to analyze the systems behavior. In this paper, we define system requirements and functionalities, and establish the system scenarios to handle the various accidents/faults in manless operation environment. We expects the proposed system requirements and system scenarios will playa key role to establish the man less operation in advanced urban transit system.