• 제목/요약/키워드: Railway Signaling System

검색결과 224건 처리시간 0.023초

틸팅차량 증속에 따른 기존선 궤도의 거동 특성 (Characteristics of Track Behaviors according to Accelerated Tilting Train Speed)

  • 신태형;최정열;엄기영;박용걸
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2008년도 춘계학술대회 논문집
    • /
    • pp.1653-1661
    • /
    • 2008
  • A trial run of locally-developed tilting train has been in process on Chungbuk line since the test vehicle was first produced. For the system stabilization, interface verification among the systems including track, structure, catenary and signaling system, not to mention the rolling stock, is very crucial. In the area of wayside structure, the stability of track structure and train run shall be evaluated through the review of impact by increased speed by developed train on track structure. The study thus was intended to evaluate the impact on track while a tilting train is running the conventional line(ballast track), which is vulnerable to accelerated train speed. The evaluation of tilting train test running the part of Honam line was conducted to identify the impact on existing track performance by tilting train. To identify the performance of each part of track components while tilting train and high speed train were running the existing line, wheel load, rail bending stress, vertical displacement of rail and sleeper were compared so as to evaluate the expected impact by tilting train for improving the train speed.

  • PDF

틸팅차량 완화곡선 증속 주행시 궤도작용력 검토 (A Study on the Rail Pone of Transition Curve Track to Speed Up of Tilting train)

  • 신태형;최정열;엄기영;박용걸
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2009년도 춘계학술대회 논문집
    • /
    • pp.529-538
    • /
    • 2009
  • A trial run of locally-developed tilting train has been in process on Chungbuk line since the test vehicle was first produced. For the system stabilization, interface verification among the systems including track, structure, catenary and signaling system, not to mention the rolling stock, is very crucial. Therefore, in this study, the dynamic rail force of the tilting (Hanvit 200), high-speed (KTX) and general (Mugunghwa) vehicle caused by driving in transition curve track was measured. And, it compared the tilting response with the other by using the measured wheel load data in transition curve track, and then evaluated probability the range of wheel load fluctuation for the variable dynamic vertical and lateral wheel load. As a result, a range of wheel load by occured a change of cant from the high-speed and general vehicle which had fixed bogie structure was distributed throughout small deviation (${\Delta}8{\sim}13kN$). Otherwise, in case of the tilting train which was consisted of the pendulum bogie structure was distributed wide range about large deviation (${\Delta}25{\sim}28kN$) by changed of cant.

  • PDF

안전분석 기법과 SysML 기반의 아키텍처 산출물의 연계성 확보를 통한 BCT 시스템의 안전 무결성 확보에 관한 연구 (On Ensuring the Safety Integrity of the BCT System through Linkage Safety Analysis Techniques and SysML-based Architecture Artifact)

  • 김주욱;오세찬;심상현;김영민
    • 한국산학기술학회논문지
    • /
    • 제17권8호
    • /
    • pp.352-362
    • /
    • 2016
  • 오늘날 산업 기술의 발달에 따른 고도화로 인해, 최근 우리 사회에 고속열차에 이어 무인운영 도시철도에 이르기까지 다양한 열차 시스템들이 개발 및 운용되고 있는 추세에 있다. 특히, 본 연구에서 대상으로 다룬, 도시철도 도메인에서는 기존 철도차량에 대해서 신호 제어 시스템을 운용하는 환경에서 보다 복잡화된 운용개념을 지원하기 위한 신규 신호 시스템 체계의 도입이 필요로 하고 있다. 또한, 기존의 존재하지 않은 컨셉을 바탕으로 개발되는 신호 시스템은 철도를 이용하는 승객들의 인적 피해를 최소화하기 위한 노력이 필요로 하고 있다. 본 연구에서는 신규 시스템 개발에 참여하는 다양한 도메인 엔지니어로 하여금 동일한 시각 제공과 통합된 방법론을 바탕으로 효율적인 신호시스템 설계 및 안전 활동을 위한 방법론을 제시 하고자 한다. 따라서, 서로 상이한 도메인 영역의 연계성 확보를 통해 향후 신규 시스템 설계시 보다 안전성 확보를 통한 설계적 무결성을 확보할 수 있는 방법론이 될 수 있을 것이다.

철도신호시스템 중첩운영으로 인한 전자파장해현상 분석 및 대책 (Analysis of EMI Between Overlapped Railway Signalling Systems and Its Countermeasure)

  • 고영환;윤선호;최규형
    • 전기학회논문지
    • /
    • 제58권6호
    • /
    • pp.1116-1122
    • /
    • 2009
  • ATS(Automatic Train Stop) system makes train stop when it runs over the speed limit and ensure the safe operation of train. Seoul Metro line 2 in Korea, which started its passenger service in 1982, has adopted ATS system for its signaling system. The ATS system has only a train stop function at the time of emergency, and Seoul Metro is planning to replaced them with ATC(Automatic Train Control)/ATO(Automatic Train Operation) system which can provide the dedicated speed control for headway reduction and automatic operation of train. Until all the ATS system is replaced with the new ATC system, both systems are to operate simultaneously at the same metro line. In this situation, ATS system sometimes reveals improper operation: train stops suddenly without any obstacles in front of it. These emergency stops cause interruption of passenger service, and abnormal abrasion of wheels and rail. This paper makes it clear that these interruptions are caused by EMI phenomena between ATS on-board device and ATC wayside device : Signal current flowing in AF track circuit of ATC is turn out to be a EMI source that prevent normal operation of the ATS on-board device. Although the two systems have different frequency-ranges (ATS system has frequency range between $78{\sim}130$[kHz] and ATC system has frequency range between $9.5{\sim}16.5$[kHz]), it turned out that EMI phenomena appears between the both systems. This is investigated by measuring the output signal from ATS on-board device passing over ATC wayside device. The FFT(Fast Fourier Transform) analysis of the signal reveals that AF track circuit signal is transmitted to the ATS on-board device and induce noise causing improper operation. The countermeasures to the EMI phenomena are examined in three ways; blocking EMI transmission, enforcement of EMS (Electromagnetic Susceptibility) of ATS on-board device, and blocking the EMI source. It is suggested that the practical solution be blocking EMI source temporarily, that is breaking AF track circuit signal when the trains with ATS on-board device pass over it. To this purpose, TODS(Train Occupation Detection System) is developed, and has made a success in preventing the EMI problem of Seoul Metro line 2.

검수고에서 소프트웨어 결함허용기법을 고려한 가상궤도회로의 적용에 대한 연구 (A Study on the Application of Virtual Track Circuit by Considering Software Fault Tolerance Techniques in Depot)

  • 이명철;고영환;김민석;이종우
    • 한국철도학회논문집
    • /
    • 제15권2호
    • /
    • pp.122-128
    • /
    • 2012
  • 차량기지 검수고에 구조를 고려하였을 시, 철제빔으로 인해 열차를 검지하기 위한 궤도회로를 설치하기가 어렵고, 레일과 대지가 철제빔으로 연결되어 누설전류가 많아지므로 궤도회로 시스템을 적용할 수 없다. 그러므로 열차가 검수고에 들어오면 수작업으로 차량이 있다는 표시를 하여 사용하고 있으며, 잘못 취급할 시에는 열차충돌 혹은 탈선으로 이어지는 사고가 발생할 수 있다. 본 논문에서는 검수고에서 소프트웨어 프로그램을 이용하여 가상궤도회로를 적용하였다. 가상궤도회로의 알고리즘을 제시하였으며, 열차가 점유된 검수고 방향으로 신호를 취급하는 경우에 검수고 열차점유 표시 및 신호기 정지신호 표시로 인해 검수고에서 열차의 안전성을 확보하였다. 또한 프로그램의 신뢰도 및 가용도를 분석하여 소프트웨어에 적합한 결함허용 기법을 적용하였다.

외란을 고려한 열차간격 최적제어 알고리즘 연구 (Study of an Optimal Control Algorithm for Train Interval Under Disturbance)

  • 김기웅;이종우;박민기
    • 한국철도학회논문집
    • /
    • 제18권5호
    • /
    • pp.419-425
    • /
    • 2015
  • 도시철도 운행시스템에서 외란에 의해 지연이 발생하면 열차 사이에 간격편차가 발생하고 열차운행 상황이 불안정해진다. 따라서 이러한 불안정한 열차운행을 방지하기 위해서는 열차간격을 적절하게 제어하는 것이 필요하다. 본 논문에서는 상용 도시철도 운행시스템에서 외란에 의해 지연이 발생하는 경우에 안정한 운행을 위하여 간단하면서 효과적으로 적용할 수 있는 열차간격 최적제어 알고리즘을 제안한다. 제안한 알고리즘은 실시간 열차간격 편차의 크기에 따라 제어 대상열차를 결정하고 이산 열차간격 모델을 이용하여 대상열차의 정차시간을 조절함으로써 모든 열차가 적정 운행간격을 유지하도록 제어한다. 또한 시뮬레이션을 통하여 제안한 방법의 유효성을 확인한다.

지하철 구간에서 이용객 증가에 따른 Wi-Fi 접속 지연 특성 (Access Delay Characteristics of Wi-Fi Network According to User Increase in Subway Section)

  • 고승천;최규형
    • 한국산학기술학회논문지
    • /
    • 제16권5호
    • /
    • pp.3455-3461
    • /
    • 2015
  • 지하철에서는 주로 LTE와 Wi-Fi를 통하여 급증하는 무선데이터서비스를 제공하고 있다. 승객의 이동에 따라 이용객 수가 급변하는 특성을 가지고 있으며, LTE는 사용자가 증가해도 안정적인 서비스 제공이 가능한 반면에 Wi-Fi는 이용객이 증가하면 접속시간이 증가하는 등 성능이 크게 저하되는 현상이 발생한다. 본 논문에서는 Wi-Fi 전송망에 대한 수학적 모델링 및 시뮬레이션을 통하여 이용객 증가에 따른 접속지연 증가 특성을 분석하였으며, 영업운영 중인 지하철 10개 역 구간에서 Wi-Fi 망에의 접속지연 및 손실률을 측정하여 비교하였다. 측정 및 분석 결과는 지하철에서의 LTE와 Wi-Fi 간 데이터 오프로딩 구성에 필요한 접속방법 및 향후 LTE-R 도입시 효율적인 망 구성에 적용할 수 있다.

저밀도 노선 적용을 위한 ATS 제어절차에 관한 연구 (A Study on ATS Control Procedure to adopt Low Density Line)

  • 조봉관;박기준;박평식;이영수
    • 전기학회논문지
    • /
    • 제64권5호
    • /
    • pp.830-837
    • /
    • 2015
  • A study which is to develop the low-cost urban railway system for low-density line such as Gwang-ju subway Line 2 is in progress, and its TCS(Train Control System) is required as an economic system which is able to train operation suitable in low-density line. We have developed the signaling equipment which is configured with automatic block system between stations, and the control center's equipment in order to meet the requirements of TCS mentioned above. In this paper, we propose the control procedure of ATS to be required for train operation management in the low-density line such as Gwang-ju subway Line 2. The control procedure of ATS considered all features such as the requirements analysis for train operation management, the functions of train control system to be applied and the block type. Also, it considered the station(interlocking, passenger, turn-back) type, station control(stop, route, departure, turn-back departure, turn-back) type, and train operation management for exiting and entering depot. The ATS control procedure proposed in this paper has an advantage in the cost and efficiency through unification and optimization of its function. And in cost of operating and maintenance, the ATS system has a feature that can be significantly reduced.

직류링크 전류를 이용한 인터리브드 양방향 컨버터의 상전류 불균형 보상 방법 (Compensation of Unbalanced Phase Currents in Interleaved Bi-directional Converter with DC Link Current Sensed)

  • 한정호;최유현;송중호
    • 조명전기설비학회논문지
    • /
    • 제28권8호
    • /
    • pp.90-97
    • /
    • 2014
  • This paper presents a compensation method of unbalanced phase currents in interleaved bi-directional converters. Phase currents in interleaved bi-directional converter are apt to be unbalanced due to circuit parameter error and switch operation difference. This problem causes the switch element failure and the reduced efficiency of the converter. Therefore, it is necessary that a certain balance control algorithm is provided in interleaved bi-directional converter system. In this paper, a balance control algorithm based on the circular chain control method is proposed. Further, in order to reduce the number of phase current sensors, this paper shows a simple method in which phase currents can be extracted indirectly through a DC-link current sensor in both charging and discharging modes. The validity and the effectiveness of the proposed phase currents balance control algorithm are illustrated through the simulation results.

국가 R&D 성과품 상용화 추진을 위한 제도개선방안 연구 (경량전철을 중심으로) (System Improvement Research for Commercial Propulsion about Government R&D Product(In Case of LRT))

  • 홍재성;박광복;류상환;이안호
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2009년도 춘계학술대회 논문집
    • /
    • pp.322-330
    • /
    • 2009
  • Traffic congestions in local cities have been getting worse since 1990s, so many local governments have considered the introduction of an LRT system. So far, there is no city operating the LRT due to social environments, financial reasons, feasibility and so on. But still many cities have examined LRT or started the construction. Until now, more than 30 cities are constructing LRT or planning the introduction of LRT and it becomes 96 routes, approximately 700km. With the support of MLTM, KRRI has developed automatic LRT system with rubber-wheels, K-AGT as a result of "LRT system technology development project" from 1999 to 2005 by investing 50.32 billion wons(the public 37, the private 13.32) and finished running durability test of 100,000km at Kyeong-san test line. Currently, two trains, coupled two cars respectively have running and signaling tested. K-AGT was appointed to supply for an extension line at Busan Subway Line 3(Minam-Anpyeong section) with 17 trains(six-unit car) 102 cars. However, except for Minam-Anpyeong section, other cities such as Uijeongbu, Yongin, Daegu(Line 3) and Kwangmyeong decided to use the foreign systems, not to use the product, a result of national R&D project. This results in a huge waste of foreign currency and it is expected to require much additional cost for maintenance. If local governments use the products of national R&D projects, many national benefits such as reducing imports and protecting home industries could be expected, therefore in this paper, some plans to encourage to use products of national R&D projects were dealt with.

  • PDF