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신승권(Seung-Kwon Shin),조현정(Hyun-Jeong Cho),황종규(Jong-Kyu Hwang),조용기(Yong-Gee Cho) 대한전기학회 2009 정보 및 제어 심포지엄 논문집 Vol.2009 No.10
컴퓨터나 통신기술의 발달로 컴퓨터를 이용한 열차제어장치 사용이 증가함에 따라 열차제어시스템에 대한 엄격한 안전성 관리와 제어가 필요하게 되었다. 왜냐하면, 열차제어용 장치들의 고장은 열차운행의 지연 및 열차 충돌의 원인이 되기 때문에 대규모 인영피해 및 경제적 손실로 직결되기 때문이다. 최근 열차제어시스템에 의한 사고억제 및 안전성 향상을 위해 결함허용 시스템 기술과 정형기법에 의한 바이탈 소프트웨어 설계 기술이 많이 연구되고 있다. 본 논문은 하나의 연산제어 시스템의 결함이 발생하여도 지속적으로 기능제공이 가능한 TMR시스템 설계를 다룬다. 300㎒급 고성능 DSP를 이용하여 데이터 공유 및 보팅의 지연시간을 최소화시켰으며, 입력을 동기화 시켜 3개의 CPU에 항상 같은 입력에 대한 연산을 수행도록 설계하였다. 또한 3개의 CPU 출력을 검사하여 2개 이상의 출력이 같은 경우만 해당 출력을 사용할 수 있도록 하여 3개 중 하나의 시스템에 결함이 발생하더라도 나머지 2개의 시스템으로 지속적으로 열차제어시스템 기능을 세공할 수 있도록 하였다.
차상신호장치와 MMI간 버스형 네트워크 통신프로토콜 설계
김석헌(Seok-Heon Kim),한재문(Jae-Mun Han),정지찬(Ji-Chan Jung),조용기(Yong-Gee Cho) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
In this paper a protocol design for bus network communication between onboard signalling system and MMI(Man Machine Interface) will be presented and illustrated. Recently many onboard signailling systems adopt hot standby for safety reasons. Hot standby is a method of redundancy in which the primary and secondary systems run simultaneously. It is convenient to use bus network(bus topology) in a hot standby system for communication between onboard signalling system and MMI. Because bus network is the simplest way to connect multiple clients such as onboard signalling system MMI and etc. However there are many problems when two clients want to transmit at the same time on the same bus. A effective protocol is necessary to solve that problems. We will describes protocol design which is useful when onboard signalling systems and MMIs are connected via RS485(Bus Network).
FPGA를 이용한 한국형 고속전철 불연속 정보 수신보드 개발에 관한 연구
한재문(Han Jae-Mun),엄정규(Um Jung-Kyu),김치조(Kim Chi-Cho),조용기(Cho Yong-Gee) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
There are two types of controller between railway and train. those are the Continuous Message Controller and the Intermittent Message Controller using for KHSR. The conventional Intermittent Message Controller board used a variable resister for setting the phase, but the variable resister affected some environmental facts, such as temperature, humidity, and vibration, etc. This study suggests how to solve the environmental problem described above. Using FPGA is quite profitable. It"s easy to use and maintain, flexible with the New algorithm to fix up the problem.
임관수(Lim Kwan-Soo),김기승(Kim Gi-Seung),박상진(Park Sang-Jin),조용기(Cho Yong-Gee) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
The information for operating the train should be transmitted to train, with extreme security. In our system. The information, such that the allowable velocity of the train, train existence in current area, and other data necessary for operating train, is transmitted in the form of FM signal. Received by the receiver located on train, the signal is filtered, demodulated, and analyzed for extracting the original information. The analysis of the demodulated signal is done through FFT algorithm using sliding slot. The simulation results shows the validity of the algorithm.
김기승(Kim Gi-Seung),김치조(Kim Chi-Jo),임관수(Lim Kwan-Soo),조용기(Cho Yong-Gee) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
It is extremely necessary to use such a secure way to transmit information to a train, which is needed for operating a train. In our system, The information including the allowable velocity of the train, train existence in current area, and other data necessary for operating train, is transmitted in the form of FM signal. Received by the receiver located on train, the signal is filtered, demodulated and analyzed to extract the original information. The analysis of the demodulated signal is done through FFT algorithm using sliding slot. These all are processed digitally by hardware which is implemented by 32bit DSP. The experiments show the validity of the algorithm we presented.
가속도한계 및 저크한계를 고려한 열차자동운전장치의 위치기반 속도프로파일의 계산 및 적용
윤영환(Young-hwan Yoon),엄정규(Jung-kyou Um),한재문(Jae-mun Han),조용기(Yong-gee Cho) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
This paper describes the calculation and application of the speed profile for the train speed control when the train is operated by ATO(Automatic Train Operation). We propose a speed profile calculation method considering the speed limitation and the jerk limitation, in order to maintain the quality of the train automatic operation. In previous works, ATO calculates a desired speed profile along the time, and controls the train to follow the profile. In this case, it may be hard to follow the restrictive speed along the location or to stop the train with a low location error, because of the difference between the desired location at each time and the real location of the train due to the control error. In the proposed method in this paper, we calculate a desired speed profile along the time considering the speed and jerk limitation first, and derive a speed profile along the location using it. If the restrictive speed profile is changed or the train speed strayed from the speed profile, ATO system calculates new speed profile and applies it immediately. Because ATO system controls the train speed based on the train location, the accuracy of the train location control can be improved. A simulation system for the test of the automatic train operation using this method is designed
방융(Bang Yung),김형훈(Kim Hyung Hoon),윤영환(Yoon Yeong Hwan),조신영(Cho Shin Young),조용기(Cho Yong-Gee) 한국철도학회 2009 한국철도학회 세미나자료 Vol.2009 No.5
The railway signaling systems operated in Korea are ATS system, A TP system for the low speed line and ATC system for the high speed line. The integrated onboard signaling system for the next-generation high-speed rail is progressed as the need for reducing a driver's load and controlling a train properly with the automatic translation of the onboard signaling system according to a trackside signaling system. In this paper the configuration of the integrated onboard signaling system and the interfaces of the subsystems is presented.
CBTC 시스템에서 논리 폐색과 이동 폐색의 혼용에 관한 연구
김형훈(Hyung-Hoon Kim),양찬석(Chan-Seok Yang),조용기(Yong-Gee Cho) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
This paper proposes a CBTC wayside signaling system which redeems existing track-circuit-based ones by using movement authorities mixed with logical block and moving block. Only one train can be entered into the logical block or the route for existing wayside signaling system. Applying moving block for CBTC system enables the train to get nearer to the preceding one because its protection mechanism uses train's safe boundary not fixed block unit. By narrowing the existing route set to switch machine and applying the moving block beyond that area more than one train can enter into one route area. This paper shows that the efficient train control i.e. shortening the headway is possible using the moving block mixed with logical block in wayside signaling system.
김석헌(Seok Heon Kim),한재문(Jae-mun Han),조용기(Yong-gee Cho) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11
일반적으로, 자동열차제어(Automatic Train Control:ATC) 불연속정보란, 열차운행에 필요한 터널, 절연구간, 가선변경구간 등 간헐적으로 필요 시마다 차량의 차상신호장치에 정보를 전달하기 위하여 사용되는 정보이다. ATC 불연속정보는 좌우측 루프에서 연속적으로 송신되고, ATC 차상장치는 그 루프 위를 지나가면서 메시지를 수신하게 되는데, 이때 열차의 속도에 따라서 수신되는 메시지의 양이 달라진다. 즉, 고속으로 지나갈 때는 그만큼 수신되는 양이 적어지게 되므로, 수신된 메시지를 정확히 분석하여 불연속정보를 획득하여야 할 필요가 있다. 본 논문에서는 고속운행 중 ATC 불연속정보를 전송하는 루프로부터 수신되는 신호를 효율적으로 분석하는 처리방법을 설명할 것이다. ATC Intermittent Message is used to send local ground information such as tunnel, cut-current track, Hot-box detector and so on to Train. ATC Intermittent Message has two ground loops, left and right loops. When train is running on the ATC intermittent loops, onboard signaling system can receive intermittent information from two left and right antennas. The number of intermittent information is based on how long antennas can stay on ATC intermittent loops. This means that train speed can decide the number of intermittent information for onboard signaling system. The onboard signaling system should be careful to use ATC intermittent information if train is running fast. Because train is running fast means that onboard signaling system can receive little ATC intermittent information than train is running slow. In this paper, the improved method for processing ATC intermittent information in high-speed railway will be presented and illustrated.