• 전기학회논문지
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• 제66권1호
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• pp.237-242
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• 2017

This paper presents development of the transponder system which provides an accurate train position, especially for supporting 400km/h high speed train. Here, we analyzed an operating frequency band of the transponder system which can be interoperable with the Eurobalise system already installed in Korea railroad as to be used for the automatic train protection (ATP). By investigating the power frequency band and its data frequency band of the transponder system, we presents the adoptable frequency band for the developed transponder system. Additionally, through the real testbed using HEMU-430X, we evaluate its performance requirement and shows interoperable operation with the Eurobalise system.

• International Journal of Railway
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• 제5권2호
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• pp.65-70
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• 2012

This paper introduced a novel railway system, Automatic Train Protection and Block (ATPB) briefly, which is proposed to improve the efficiency of existing regional train lines with low cost in Japan. The biggest superiority of ATPB system is a great use of universal and mature technologies, such as GPS and regular mobile telephone networks, so that there is nearly no increment of trackside equipments in the reconstruction. Then in order to guarantee the system safety, a formal model of ATPB is established and analyzed by formal method VDM++. Firstly, the specification is specified by VDM++ formally without ambiguity. Secondly, its internal consistency is proved by discharging the proof obligations. And finally, its satisfiability is checked by systematic testing, which executes specification and checks the outputs against corresponding inputs.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.1031-1033
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• 2008

차세대 한국형 고속열차는 분산형 시스템으로 최고속도 400km/h, 운행속도 350km/h을 목표로 개발중에 있다. 차세대 고속열차의 신호시스템은 기존선의 자동열차정지(ATS, Automatic Train Stop) 및 자동열차방호(ATP, Automatic Train Protection)와 고속선의 자동열차제어(ATC, Automatic Train Control) 신호방식을 모두 사용하는 ATP+ATS+ATC 형태의 차상장치가 개발 설치될 예정이다. 따라서 이러한 장치의 개발과 연계하여 차세대 한국형 고속열차는 기존 경부고속선에서 시험주행을 할 예정이다. 따라서 기존 경부고속선에서 차세대 고속열차의 최고 속도시험를 위한 신호분야의 방안을 검토하고자 한다. 본 논문에서는 3가지의 방안을 제시하여 적합성과 운영효율성을 고려하여 최적의 방안을 도출하는 방식으로 전개할 예정이다.

• 한국산학기술학회논문지
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• 제16권9호
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• pp.6274-6281
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• 2015

무선통신기반 열차제어시스템은 차상과 지상과의 양방향 무선통신을 기반으로 실시간 열차간격제어가 가능하므로 운전시격 단축 효과가 있으며 궤도회로를 사용하지 않기 때문에 설비투자를 절감 할 수 있다. 무선통신기반 열차제어시스템에서 가장 중요한 부분인 자동열차방호(ATP: Automatic Train Protection)는 실시간 열차위치 추적을 기반으로 선행열차와 후행열차간의 안전한 간격제어를 수행한다. 본 논문은 도시철도용 무선통신기반 열차제어시스템의 열차간격제어를 위한 전체적인 ATP 열차간격제어 알고리즘과 ATP의 처리속도 향상을 위해 전처리 기반 속도프로파일 계산 알고리즘을 제안한다. 제안된 속도프로파일 계산 알고리즘은 사전에 선로와 열차의 영구속도제한에 해당하는 프로파일을 미리 계산하여 가장제한적인 속도프로파일로 활용한다. 만약 운행 중 특정 노선 구간에 임시속도제한이 발생하는 경우 미리 계산된 영구속도프로파일에 임시속도제한을 반영하여 해당 구간의 속도프로파일을 업데이트함으로써 계산효율을 높일 수 있다. 제안된 속도프로파일 계산 알고리즘의 성능을 평가하기 위해 시간복잡도 O-notation으로 분석하였으며 그 결과 기존에 비해 시간 복잡도를 개선할 수 있음을 확인하였다. 또한 ATP 열차간격제어 검증을 위해 열차간격제어 시뮬레이터를 제작하였으며 실험결과를 통해 다양한 운영상황에서 안전한 열차간격제어가 이루어지고 있음을 확인하였다.

• International Journal of Railway
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• 제1권4호
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• pp.149-156
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• 2008

During maintenance or construction works in or at the tracks of railways, high risks for passengers and railway staff, especially for the workers on the construction site exist. The high risks result out of the movement of rail vehicles, like trains or construction vehicles, which must be faced by using any available technical and operational technologies for securing them against the environment. Therefore, it is necessary to evaluate the level of protection continuously and to identify new and innovative methods and technologies for the protection of the gang (construction worker, machines and material). Especially on construction sites at line sections with two or more parallel tracks but also with single tracks, there are still a lot of incidents and accidents mostly with seriously injured persons or fatalities. These were mainly gang members that breach the railway-loading gage. By using proper warning or protection systems, the avoidance of such accidents must be achieved. The latest developments. in gang protection systems concern on the one hand fixed barriers in the middle between the construction site and the operated track and on the other hand construction vehicles equipped with automatic warning systems. The disadvantage of such protection methods is that the gang can be warned against an approaching train but a monitoring of the gang members cannot be performed. Only one part of a potential dangerous situation will be detected. If the gang members will overhear the acoustic warning signal of the security staff and the workers will not leave the danger zone in the track, the driver of the approaching train had no chance to react to the dangerous situation. An accident is often inevitable. While the detection of acoustic warning signals by the gang members working on a construction site is very difficult, the acoustical planning of an automatic warning system has to be designed for an acoustic short range level of one meter besides the construction vehicle. The decision about the use of today's technical warning system (fixed systems, automatic warning systems, etc.) must be geared to the technical feasibility and the level of safety which is needed. Criteria for decision guidance to block a track should be developed by danger estimation and economical variables. To realize the actual jurisdiction and to minimize the hazards of railway operations by the use of construction vehicles near the tracks further developments are needed. This means, that the warning systems have to be enhanced to systems for protection, which monitor the realization of the warning signal as a precondition for giving a movement authority to a train. This method can protect against accidents caused by predictable wrongdoing. The actual state of the art technique of using a collective warning combined with additional security staff is no longer acceptable. Therefore, the Institute of Transportation System of the German Aerospace Center in Braunschweig (Germany) will develop a gang warning and protection system based upon imaging methods, with optical sensors such as video in visible and invisible ranges, radar, laser, and other. The advantage of such a system based on the possibility to monitor both the gang itself and the railway-loading gauge either of the parallel track or of the same track still in use. By monitoring both situations, the system will be able to generate a warning message for the approaching train, that there are obstacles in the track, so that the train can be stopped to prevent an accident. And also the gang workers will be warned, while they breach their area.

• 한국산학기술학회논문지
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• 제11권7호
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• pp.2534-2540
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• 2010

본 논문에서는 틸팅열차의 안전성 확보 및 운행효율 향상을 위해 “한국형 틸팅열차 신뢰성 평가 및 운용기술개발” 연구과제의 한 분야로 추진된 ATP 차상장치의 설치 및 시운전시험에 대한 내용 및 결과를 제시하고 있다. 한국철도기술연구원에서는 기존선의 속도 향상과 KTX 비수혜지역의 여객 서비스 향상을 위해 틸팅열차를 개발하였으며 개발된 틸팅열차의 신뢰성 평가를 위해 기존에 사용되고 있는 ATS 장치에 의한 10km 주행 시운전 시험을 진행하였다. 국토해양부에서는 KTX가 운행되지 않는 지역인 중앙선 및 충북선을 비롯한 7개 기존 노선을 200km/h 이상으로 고속화하기로 하였으며, 이에 따라 열차제어시스템은 기존의 ATS 장치에서 ATP 장치로 개량하여야 한다. 따라서 틸팅열차에도 ATP 차상장치를 설치하여 운행 적합성을 확인하여야 하기 때문에 한국철도공사의 경부선 및 호남선 ATP 구축사업에 사용된 것과 동일한 ATP 차상장치를 틸팅열차에 설치하여 시험하였다.

• 전기학회논문지P
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• 제64권3호
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• pp.97-103
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• 2015

To achieve the safety and reliability, RAMS activity for a railway signal system of Near Surface Transit is studied. In this paper, preliminary hazard analysis in RAMS activities is studied for the railway signal system of Near Surface Transit. Preliminary hazard analysis is done through automatic train protection, automatic train operation and automatic train supervision. The hazards are defined, then causes and consequence for each hazard are defined. The total 75 preliminary hazards are classified. For high severity hazards are changed to acceptable level by upgrading of system requirement specification.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.211-225
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• 2011

Railroad signalling systems are to control intervals and routes of trains. There are ATS(Automatic Train Stop), ATP(Automatic Train Protection), ATO(Automatic Train Operation) and ATC(Automatic Train Control) system. Trains are operated in the section which is met on the signalling system because various signalling systems are used in Korea. On the other words, trains are not operated in the section which is used in the other signalling system. To solve this problem, recently combined on-board system has been developed. The combined on-board system is designed by doubling the ATS, ATP and ATC system. Information signal is received by magnetic sensors in the ATC system and is received by antennas in the ATS and ATP system. Therefore, it is possible to arise transmission problems by magnetic coupling. In this paper, electric model of the ATS and ATP antenna is suggested and interference frequency by the magnetic coupling between the ATS and ATP antenna is estimated numerically. As a results of the magnetic coupling, the value of the magnetic coupling is presented without magnetic induction.

• 한국철도학회논문집
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• 제12권6호
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• pp.852-858
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• 2009

본 논문은 기존선을 고속으로 운행하기 위해 개발된 한국형 틸팅열차 차상신호장치의 신뢰성관리방안에 대한 연구이다. 기존선 자동열차방호(ATP) 및 자동열차정지(ATS)구간을 운행하는 틸팅열차의 안전한 운행을 위해, 선행 열차위치 및 선로환경에 따라 부여된 이동권한 및 제한속도를 기준으로 제동곡선을 생성하여 기관사 실수 및 장애로부터 열차의 안전을 확보하는 차상신호장치의 신뢰성관리방안을 제시한다. 또한 제시된 방안을 기준으로 열차제어시스템의 신뢰도를 예측하고, 검증하는 방안을 국제규격인 IEC 62278(EN 50126)을 기준으로 수행한 사례를 제시한다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.666-670
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• 2011

ATS(Automatic Train Stop)s are is effected by track environment, signal distance and train braking distance. So onboard signaling systems such as ATP(Automatic Train Protection) are installed on conventional lines by some train operation companies. With the mixed signalling, the onboard signaling system is overlaid on a conventional line with ATS, it is possible to run the line with conventional trains and ATP trains and to use the advantages of ATP(higher speed or more trains on the line). This paper includes guidelines a mixed signalling(ETCS and ATS) system architecture, operation concepts and infill balise installation.