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Petri Net 형식론을 이용한 철도차량 주차단기 제어회로 모델링
최권희(Choi Kwon-Hee),안홍관(Ahn Hong-Kwan),김재기(Kim Jae-Gi),송중호(Song Joong-Ho) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The computer system is used in many application domains and any system error in these domains may either cause critical loss or threaten environment or human life. Though examples of these domains can be found in many areas, the system, which is used in domains for carrying passengers including rolling stocks in particular, is expected to show satisfactory operation all the time. The relay control logic, which is used in rolling stocks, is complex in hardware and occupies considerably large volume. Nevertheless, it has been used for a long time, to let the system safely operate even in the occurrence of an error in the computer system. However, the relay control logic circuit is so complex that the analysis of proper circuit operation and interlocking tends to be dependent only on the designer’s experiences instead of being systematically performed. Especially, the analysis following a change, addition and deletion of a previous circuit according to the requirements from a source of demand is significantly limited. In this paper, the accuracy of relay control logic is verified by the use of properties of Petri Net model. In addition, how main circuit breaker (MCB) control circuit is modeled and analyzed by the design methodology is shown.
고속열차 배전반의 냉각성능 신뢰성 향상 방법에 대한 연구
최권희(Choi Kwon-Hee),정병호(Jeong Byung-Ho),이병석(Lee Byung-seok),박종훈(Park Jong-Hun),이종우(Lee Jong-Woo) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
The cubicle of high speed train is the equipment where the important train- operating equipments are concentrated, so it requires the higher safety and reliability than any other equipment. Recently, the power car cubicle of KTX-II is, basically similar to that of KTX-I and HSR350x in its size, but consequently, as more sophisticated ATP/ATC and other parts are added, the order company points out the problem of rising temperature in summer. Especially, the interpretation about the possibility of guaranteeing the minimum freezing performance becomes necessary, when Fan Tray is out of order. This paper presents the method of improving the freezing performance while minimizing the effect of dust, and the method of guaranteeing the present freezing performance by the best arrangement of Fan Tray, when Fan Tray is out of order. And as a method of verifying this, we would like to predict the pressure, speed of a running fluid and temperature distribution of cubicle through the flow analysis.
최권희(Choi Kwon-Hee),라준호(Ra Joon-Ho),심재철(Shim Jae-Chul),김형인(Kim Hyung-In),정성윤(Jung Sung-Yun) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
In a high speed train, OBCS(On-Board Computer System) is a up-to-date computer control system that provide controlling, monitoring, maintaining and reparing of the important device, supporting a driver, status of a train, service maintenance, managing the remote control mode, driving order & control, control of a electrical or pneumatic circuit and a passenger service. In general, OBCS is located in each car but in a power car, both main and auxiliary computers are used. These avoid a network collision and maintain the independence of condition and failure records with the information of line number, train number and car number. This paper is intended to provide the information about the identification coding method of domestic and foreign OBCS, for the new high speed train (KTX-II).
고속열차 주행 안전성 시험을 위해 시뮬레이터로 구현한 대차 불안정 센서
최권희(Choi Kwon-Hee),김국진(Kim Kuk-Jin),이병원(Lee Byung-Won),이종우(Lee Jong-Woo) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
The bogie of Rolling Stock is the basic rolling component. It operates the train body, guides the body considering various tracks and offers comfort to passengers. We can verify the safety level of bogie about all factors through the first -grade scenario of Preliminary Hazard Analysis, but especially the horizontal acceleration sensor, equipped in each power bogie and trailer bogie, is the device, which makes it possible to test bogie instability and uncomfortable body movements by the method, similar to actual train driving, and in this context the necessity of this device becomes important. This paper would classify the main functions of driving sub system and examine the reliability, availability, maintainability and safety, which are main factors of RAMS. Especially, we would realize the bogie instability sensor with a simulator and offer the content in analyzing the data by the statistical method, which are obtained through the connected test with OBCS.
최권희(Choi Kwon-Hee),정병호(Jeong Byung-Ho),민평오(Min Pyung-Oh),오용석(Oh Yong-Suk),이종우(Lee Jong-Woo) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
One of the most important targets of transportation is to transport human and commodities to the destination safely. Railway has low risk, compared with land, ocean and flight route and it assures high security as well as high speed driving, since it runs on regular track. However, train accident may result in tragic accident due to small carelessness, so special event recorder is preferably used in order for clarity of responsibility in case of accident, maintenance of signal device and defect analysis. JRU(Juridical Recorder Unit) for ATC/ATS/ATP can be more advanced event recorder. Event recorder of KTX-I which is running now is installed one by one on each leading car and last car, and operation plan of event recorder in case of single trainset is suggested. But regarding train operation of multi-coupled trainset operation such as KTX-II, more detailed study is required for event recorder revitalization and record data process method. Therefore, this research aims at operation plan used in existing event recorder, and suggests effective operation and management plan of event recorder in multi-coupled trainset such as new High Speed Train.
이훈구(Lee Hoon-Goo),최권희(Choi Kwon-Hee),조용균(Jo Yong-Gyun),이영호(Lee Young-Ho),황현철(Hwang Hyeon-Chyeol) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.4
It is a proven fact with the opening of the Seoul metro line number 1 in 1974 traffic congestion on the roads has decreased and the efficiency of people transportation in general has greatly been enhanced in the downtown and surrounding areas of Seoul. Even today construction of new subway lines are under way and many more are being planned due to the easy access to stations, short waiting and average traval times, compared with personal vehicles, contributing to the efficiency of the public transportation systems that are linking the downtown areas and also the intercity systems in moving passengers during rush hour and times of special event. Since the labour costs of the train operator in any large city based subway system accounts for a major part of the operating costs per kilometer and to ensure cost efficient operations, especially during non-peak hours, it is necessary to implement an unmanned(auto-driven) subway system. In order to implement such a system it is imperative that the on-board and wayside signalling control systems be fully automated as well. Only through proper examination of safety procedures not only by the AUGT(Automated Urban Guided Transport)system but also by all the international standards organizations involved can safely and stability be ensured.
철도 승강장 선로의 침입자 및 장애물 검지시스템에 관한 연구
김유호(Kim You-Ho),김진철(Kim Jin-Cheol),최권희(Choi Kwon-Hee),편선호(Pyeon Seon-Ho),황종규(Hwang Jong-Gyu) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
Passenger safety is a primary concern of the railway system. However, dozens of people are killed every year when they accidently fall on to the track from the boarding platform. This is one of the most urgent issues to solve regarding the railway platform. The installation environment, and the blind area problems as well as maintenance and operating costs which are not efficient have to be looked at. To solve these problems, we propose a 3D laser radar sensor based monitoring system for the railway platform. This paper introduces an overview, the detecting method, and the interface with the signalling system in detecting a fallen passenger from the platform using the 3D laser radar sensor.