• Title/Summary/Keyword: AGT(Automated Guideway Transit)

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Radio coverage prediction of RF-CBTC system under transmission power 10mW/MHz at K-AGT test line (경전철시험선에서 송신전력 10mW/MHz에 대한 열차제어용 무선시스템의 전파도달범위 예측)

  • Cho, Bong-Kwan;Jung, Jae-Il
    • Journal of the Korean Society for Railway
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    • v.10 no.5
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    • pp.589-595
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    • 2007
  • Korea Railroad Research Institute has developed the driverless rubber-tired K-AGT (Korean-Automated Guideway Transit) system from 1999 to 2005 and has done its performance and reliability tests on the test line at Gyeongsan-city. Radio Frequency Communication-Based Train Control system of K-AGT, which employed Advanced Automated Train Control scheme, detects train position using the radio propagation delay between wayside and vehicle radio equipment. In this paper, we investigate whether the transmission power of radio system can be reduced to the permitted level announced by the Ministry of Information and Communication for license-free ISM(Industrial Scientific Medical) frequency bands. We first determine radio propagation model, using the measured data at test line, and perform simulation for radio coverage prediction. From the simulation results, we identify that the radio system operated with reduced power can provide good link quality in total test line.

Analysis and Test of CBTC Wireless Communication System in KyungSan test Line (II) (경산시험선 CBTC 시스템용 무선통신시스템 시험(2))

  • Ryu, Sang-Hwan;Cho, Bong-Kwan;Lee, An-Ho;Hwang, Hyeon-Chyeol;Yang, Doh-Chul
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2735-2744
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    • 2011
  • Korean-Automated Guideway Transit (K-AGT) was successfully developed through Light Rail System Development Project. Since then, the domestic development rate of on-board signalling system of light rail has been improved up to 90% by Practical Utilization Project of Light Rail. After utilization project, furthermore, POSCO ICT has developed the wayside signalling system of CBTC, including wireless communication equipment. KRRI carried out the performance test of the wireless communication, interfacing and using the other CBTC equipments of KyungSan Test Line so as to see whether it conforms IEEE 802.11x, international communication standard in view of operational concept of CBTC. In this paper, we presents analysis results of roaming test while train runs.

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Analysis and Test of CBTC Wireless Communication System in KyungSan test Line (I) (경산시험선 CBTC 시스템용 무선통신시스템 시험(1))

  • Cho, Bong-Kwan;Ryu, Sang-Hwan;Lee, An-Ho;Hwang, Hyeon-Chyeol;Park, Gi-Su
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2731-2734
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    • 2011
  • Korean-Automated Guideway Transit (K-AGT) was successfully developed through Light Rail System Development Project. Since then, the domestic development rate of on-board signalling system of light rail has been improved up to 90% by Practical Utilization Project of Light Rail. After utilization project, furthermore, POSCO ICT has developed the wayside signalling system of CBTC, including wireless communication equipment. KRRI carried out the performance test of the wireless communication, interfacing and using the other CBTC equipments of KyungSan Test Line so as to see whether it conforms IEEE 802.11x, international communication standard in view of operational concept of CBTC. In this paper, we presents the test plan, test items, and the analysis results of maximum communication distance tests between on-board and wayside radio sets.

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Automatic Train Control (ATC) System Development through Application of Reverse and Re-Systems Engineering Process (역공학 및 재공학 시스템엔지니어링 프로세스 적용을 통한 무인열차자동제어시스템 개발)

  • 이중윤;박영원
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.10
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    • pp.836-843
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    • 2003
  • The automatic train control (ATC) system development project for the Automated Guideway Transit (AGT) system has high technical risk because the system is unmanned train control system using wireless technology which was unprecedented in train control industry of Korea. To overcome the technical risk during concept design phase of the ATC system development project, the integrated product team(IPT) carried out a reverse and reengineering process using a systems engineering design model. The generic systems engineering process is incorporated in the both reverse and reengineering process. As a result of the systems engineering effort, the IPT has built top layer systems engineering design model of the ATC subsystem. The purpose of this paper is to deliver the reverse and reengineering process which was used to develop the systems engineering design model of ATC system using a computer aided systems engineering tool. This study also shows that the model based reverse and reengineering process can reduce the technical risk by identifying the differences of requirement, functional and physical architecture between a reference system and a target system.