• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2007년도 제38회 하계학술대회
• /
• pp.1181-1182
• /
• 2007

Light Rail Transit (LRT) System is an urban transit system which has approximately an intermediate transportation capacity between conventional subway and bus ($5,000{\sim}25,000$ persons per hour and per direction). It is a high-tech system which operational capacity, punctuality and mobility are remarkably improved. There are some types of LRT systems such as monorail, tramway, AGT(Automated Guideway Transit), and so on. The LRT systems have been applied and being operated in about a hundred lines around the world and many projects that apply the LRT systems in Korea are being proceeded and scheduled. For the efficient management, economical construction, and safe operation of various LRT systems, the establishment of national standard is necessary such as vehicle standardized specification, vehicle performance test standard, vehicle safety standard, construction guide, operation regulation, etc. of LRT systems. This paper presents the standard specification of electrical equipment of linear induction motor type light rail vehicle, that is LIM AGT(AGT system propelled with linear induction motor) vehicle. The LIM AGT system has been applied in Japan subway and ART(Advanced Rapid Transit) system of Canada and Yongin LRT is currently under construction.

• 한국산학기술학회논문지
• /
• 제17권7호
• /
• pp.425-433
• /
• 2016

경량전철시스템의 건설은 노선당 수천억 원에서 조 단위의 건설비가 소요되는 대형 복합인프라 사업으로, 건설된 시스템은 장기간 운영되기 때문에 생명주기관점에서 사업을 추진하는 것이 매우 중요하다. 시스템엔지니어링은 고객의 요구를 성공적으로 구현하는 수단 및 방법론으로 경량전철사업과 같은 대형 사업에 매우 유용하다. 이러한 시스템엔지니어링 접근법을 경량전철사업에 적용하기 위해 개발된 전산모델 SELRT(Systems Engineering application model for Light Rail Transit project)가 현장에서 활용되기 위해서는 모델에 대한 검증이 필요하다. 시스템엔지니어링에서의 검증은 시스템요구사항을 만족하였음을 확인하는 것이다. 따라서 본 논문에서는 시스템엔지니어링 방법론에 따라 검증 절차와 검증 아키텍처를 제시하고, 이에 따라 시스템요구사항을 식별하였다. 또한 시스템요구사항을 검증하기 위해 국제 표준규격 등 참조규격을 참고하여 검증요구사항 및 검증항목과 검증기준을 도출하였으며, 검증절차에 따라 SELRT를 시연하고 결과를 검증요구사항과 비교하였다. 그 결과 시스템요구사항과 검증요구사항의 추적성, 검증요구사항별 검증방법, 전산도구의 시연결과가 상호 연결되고, 최초요구사항이 SELRT에 명확히 구현되었음을 확인할 수 있어, 제안된 방법이 SELRT 검증에 유효하며, SELRT도 경량전철사업현장에서 활용될 수 있음이 확인되었다.

• Smart Structures and Systems
• /
• 제21권5호
• /
• pp.537-548
• /
• 2018

A tunnel deformation monitoring system is developed with the use of fiber Bragg grating (FBG) sensing technique, aiming at providing continuous monitoring of railway tunnel deformation in the long term, and early warning for the rail service maintainers and authorities to avoid catastrophic consequences when significant deformation occurs. Specifically, a set of FBG bending gauges with the ability of angle measurement and temperature compensation is designed and manufactured for the purpose of online monitoring of tunnel deformation. An overall profile of lateral tunnel displacement along the longitudinal direction can be obtained by implementing an array of the FBG bending gauges interconnected by rigid rods, in conjunction with a proper algorithm. The devised system is verified in laboratory experiments with a test setup enabling to imitate various patterns of tunnel deformation before the implementation of this system in an in-service high-speed railway (HSR) tunnel.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
• /
• pp.1743-1753
• /
• 2011

Seoul Metropolitan Government has performed alternative transit system, light rail transit(LRT), for settling the problems of urban public transit system based on conventional bus service and heavy rail transit(HRT). LRT projects of total 8 lines(about 73.6km), including Ui-Sinseol line, have been planned as Build-Transfer-Operate(BTO) projects. For the first LRT, Ui-Sinseol line, however, design of structure had met standard for design of HRT, because of no domestic design code for LRT when participates of Ui-Sinseol project submitted the design proposal. This case study reports a successful example of LRT design minimizing the scale of stations designed in base of HRT code. The problems, like oversized structures compared with LRT vehicles, excessive costs for construction, had been resolved through negotiations with the participates of Ui-Sinseol line. Result suggests that present and future costs for construction and maintenance of the LRT projects in Seoul be considerably reduced in advance.

• 전기학회논문지P
• /
• 제59권1호
• /
• pp.71-76
• /
• 2010

This paper is focused on implementing a real-time data acquisition system that checks power facility status by applying network based technology to Urban Transit substation power facilities and the results of its on-field tests. This system is composed of a sensor part, a measurement part, a transceiver part, a host computer, and a power source part. The system is designed to collect, save, analyze, and display the online state power facility AI (Analog Input). This system measures voltage and current from positive feeders and negative feeders where it is possible to check abnormalities of the substation‘s main power facilities. By monitoring abnormal data of the Urban Transit power facilities real-time and analyzing stored data, establishing procedures of optimized maintenance is possible.

• 한국철도학회논문집
• /
• 제9권6호
• /
• pp.711-716
• /
• 2006

A set of design factors that should be considered during rail transit system development in proposed. As the current trend in the rail transit development emphasizes its role as a medium through which the interaction between the city environment and people takes place, the factors of harmony, color, characteristics, identity, and communication should be considered in the railway-transit system design. It's important to ensure that there exist harmony between the design and the civic environment, the influence of color on people is properly considered, the car design possesses distinct characteristics, and that the sense of common identity as well as effective communication is fostered between the system and people it serves. Several cases from various countries are presented to illustrate the points raised in the paper.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2010년도 춘계학술대회 논문집
• /
• pp.2297-2302
• /
• 2010

The status and effectiveness of Bi-modal Tram is analyzed through the comparison of the transport effectiveness and operation cost between the public transportation systems (bus, light rail transit) considering the vehicle and operation characteristic of new transit system Bi-modal Tram. The standard operation schedule is established in consideration of the vehicle specification and operation characteristic of main public transportation modes, and then the annual average operation cost is estimated depending on the volume, speed, analysis length for respective public transportation mode. Through analyzing the operation cost and distribution characteristic of public transportation modes depending on the transport volume and travel speed, the operational efficiency suitable for the city is derived. It is concluded that the operational efficiency of Bi-modal Tram is superior to that of the bus and light rail transit on the aspect of travel volume and operation speed.

• 화약ㆍ발파
• /
• 제32권1호
• /
• pp.18-22
• /
• 2014

코레일(한국철도공사)는 "지진가속도계측기 설치 및 운영기준"을 수립하여 고속철도에 적용하고 있으며, 고속철도 운전취급세칙을 개정하여 지진 발생시 철도의 안전운행을 위한 운전취급 요령에 따라 단계별 열차운행패턴을 구축하여 운영 중이다. 본 연구는 지진가속도계가 설치된 고속철도 인접구간에서 발파작업을 위한 노천 및 터널발파 설계 사례이다.

• 한국철도학회논문집
• /
• 제17권2호
• /
• pp.133-139
• /
• 2014

국내에 건설 운영 중인 경전철 고가구조물은 설계 당시 경전철 고가구조물 설계기준이 마련되어 있지 않아 일반 철도교 설계기준 및 국외 차량제작사에서 제시한 설계기준을 참조하여 설계된 관계로, 고가구조물이 과다 설계되어 비경제적으로 건설된 주된 이유가 되고 있다. 본 연구에서는 고무차륜형 경량전철이 고가구조물 위를 각각 50km/h, 60km/h, 70km/h의 속도로 주행 중 5개 제동 지점별로 제동 시 고가 하부구조물에 작용하는 제동하중을 현장 계측시험을 통해 분석하였고, 현재 설계시 반영되고 있는 철도설계기준과 비교하였다. 본 연구에서 제시된 제동하중 시험분석 결과는 향후 경전철 고가구조물 설계기준 제정 시 참조될 수 있다.

• 대한교통학회:학술대회논문집
• /
• 대한교통학회 1996년도 제3회 한-중 국제학술회의
• /
• pp.95-128
• /
• 1996

Dipped track profiles between rail transit stations can significantly reduce propulsive energy, braking energy and travel times. This work quantifies their potential benefits for circumstances reflected in various values for dips, speed and acceleration limits, station spacings, and available power. A deterministic simulation model has been developed to precisely estimate train motions and performance using basic equations for kinematics, resistance, power and braking. For a dip of 1% of station spacing, in which gradients never exceed 4%, our results show savings (compared with level tracks) exceeding 9% for propulsive energy, 15% for braking energy and 5% for travel time between stations.