• International Journal of Railway
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• 제2권3호
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• pp.107-112
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• 2009

Research projects of SNCF aim at reducing the costs of infrastructure possessions and improving the operational equipment availability and safety. This permanent search for a better regularity led the SNCF to analyse the maintenance approach of signalling equipment in detail. Until now, it was commonly acknowledged that signalling equipment, which consists of many electronic devices, is not subject to aging. In this study, a Weibull lifetime model, able to describe an aging phenomenon, is used and it can be shown that the deterioration is statistically significant. The validity of the model is tested. We also analyse the influence of environmental covariates. We simulate different scenarios in order to investigate the impact of several maintenance strategies as well as on future maintenance costs, on the amount of components to replace based on the mean age of the network. It can be shown that in most cases a systematic replacement strategy offers the best solution.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.285-288
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• 2001

The Railway Signalling Equipment's transformation to Micro-electronic has been caused to the decrease of its introspection against a surge voltage. So, there has been many tries to protect the railway signalling equipment from a surge voltage by using of a various surge protector. In this study, we are trying to draw up the protective plan to prevent this weakness on introspection by analyzing the electric characteristic on such a surge protector and reviewing the way on distributing wires in signalling room.

• 한국철도학회논문집
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• 제12권4호
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• pp.535-541
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• 2009

전자부품으로 구성된 제어기의 선뢰성에 대한 연구는 미국방부를 중심으로 1960년대부터 연구되었으며, 철도분야에서는 유럽을 중심으로 1990년대부터 연구되었다. 특히 한국에서는 2000년대 이후부터 신호설비 신뢰성에 대한 연구가 시작되어 과거 신뢰성정보가 없는 노후신호설비를 대상으로 하는 효율적인 유지보수를 위한 신뢰도 평가가 요구되고 있다. 본 논문에서는 부품단위 고장률 또는 운영시 발생된 고장정보와 같이 신호장치의 신뢰성이 지속적으로 감시 및 분석되지 않고 25년 이상 사용된, 노후신호장치를 대상으로 부품단위 신뢰도를 평가하고, 잔존수명함수를 사용하여 현재시점에서의 신뢰도변화를 예측하였으며, 연장사용이 요구되는 기간에 대한 가속스트레스시험을 통해 연장사용의 가능성을 평가하는 모델을 개발하였다. 개발된 모델은 노후신호설비를 운영하는 철도운영기관이 미래의 유지보수정책을 수립하기 위해 활용될 것이다.

• 한국철도학회논문집
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• 제12권5호
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• pp.670-677
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• 2009

본 논문은 최고속도 400km/h의 차세대고속열차 차상신호장치의 최고속도시험을 위한 방안을 연구한다. 차세대고속열차 차상신호장치는 열차가 고속선 자동열차제어(ATC)구간과 기존선 자동열차정지(ATS) 및 자동열차방호(ATP)구간을 운행하는 동안 기관사에게 운전정보를 제공하고 기관사실수, 신호장치고장, 천재지변 등으로부터의 열차 안전 확보를 목적으로 한다. 차세대고속열차 최고속도 400km/h 시험은 차상신호장치를 포함한 열차성능 검증을 위한 필수과정으로써, 본 논문에서는 차상신호장치의 기능 및 최고속도시험의 필요성을 분석하고, 고속선 ATC구간에서 최고속도시험을 실시하기 위한 인프라의 변경사항 및 구체적인 시험방안을 연구한다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2004년도 춘계학술대회 논문집
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• pp.460-462
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• 2004

This paper gives a basic data of improving the performance of railroad signalling equipment by adopting GPS and wireless telecommunication technologies. These approach enable the moving block control of train, which can optimize train operation by reducing the distance between trains and maximize the railroad capacity. These method of detecting train position and controling train movement can also improve the train route control at stations.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.1126-1131
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• 2008

In this paper we introduce an applicable RCM(Reliability centered maintenance) method for Track circuit equipment of AREX's Signalling System. AREX computerize all the process of FRACAS(Failure Reporting, Analysis and Corrective Action System)) by the Facility Management System of Integrated Information System. These datum were analysed and reproduced as the RAMS index value which can be used by maintenance staff for optimizing the maintenance method of the System.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 B
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• pp.1384-1386
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• 2000

To determine operational requirement, the environmental condition for an equipment must be investigated, and to certify equipment's normalized operation, appropriate test must be carried out under the considered environmental condition. The actual environmental conditions to which equipment is likely to be exposed are normally complex and will comprise a number of environmental factors and corresponding parameters, When defining the environmental conditions for a certain application it is, therefore, necessary to list the factors involved and select the appropriate severity. The operational environment is structured in two separate such as requirements, guidance and test specifications. For the preparation to determine operational requirement, operational environment of railway signalling equipment is investigated.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.363-367
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• 2011

In this paper a simulator for Integrated Onboard Signalling System(IOSS) will be presented and illustrated. IOSS which is integrated with there signalling systems such as ERTMS/ETCS Level 1 ATP(Automatic Train Protection), ATC(Automatic Train Control) and ATS(Automatic Train Stop) is a signalling system for HEMU-400X(Highspeed Electric Multiple Unit - 400km/h eXperiment). HEMU-400X is under development as the next generation high-speed train in Korea. Before conducting a trial run of HEMU-400X with IOSS, we must carry out functional test of IOSS. The simulator is suggested in this paper for testing and verification of IOSS. The simulator can help to test all function of IOSS although a real train and trackside equipments are not existed. Also the simulator can make a fault in trackside equipment intentionally. In that scenario, we can figure out how IOSS handle emergency situations.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.993-999
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• 2007

With the introduction of the RAMS(Reliability, Availability, Maintainability, Safety), the interest of the system assurance has been increased. First of all, fast-growing electronic circuit requires analyzing the failure rates, by dividing the signalling system more specifically. Since 2005, the K.N.R (Korean National Railway) has incorporated ERP(Enterprise Resource Planning) in order to establish the complete status as the top international comprise, therefore while ordering the project, it has established the classification system and then has been applying to ERP system in 2007. Due to the complex of the classification system, the reliability analysis of the signalling system was assessed with the limit of IXL ATP with On-board and wayside equipment. This paper assumed MTBF(Mean Time Between Failure), MTTR((Mean Time Between Repair) of total signalling system, by using the classification of ERP program.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.596-602
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• 2008

Recently, there are increasing social needs for safe operation of trains and comforting for passengers. But lightning surges are responsible for serious disturbances such as damage, permanent degradation or temporary erratic operation of sensitive electronics circuits and systems. The purpose of this paper is to identify the requirements for Surge Protective Devices(SPDs) used in protecting railway signalling system. In this paper, we describes tests and requirements which establish methods for testing SPDs and determining their performance.