http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
일반철도 고속화 구간에서 차축온도검지장치 활용방안에 대한 연구
최권희,김유호,백승문,빙군섭 대한안전경영과학회 2012 대한안전경영과학회 학술대회논문집 Vol.2012 No.04
HBD(Hot Box Detector) is a device to monitor temperature rises to inappropriate lubricant use or mechanical defects. If a train operates without recognizing such an effect, it might result in bearing overheating due to defects and cause a dangerous situation that it could derail a train owing to the damage of axles. Now for the Gyeongbu HSL at 300km/h, the laws related to monitoring overheated axle bearings are notified in the Railway Safety Law and the Railway Construction Law. But in case of the conventional speed-up lines that a train operates at 180 to 230 km/h, the revised bill of relevant standards is ongoing. Therefore in this paper we present references and reviews investigated in order to use the optimal HBD in the conventional speed-up lines.
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 Kweon-hee),장대성(Chang Dae-sung),김철근(Kim Chul-keun),한동인(Han Dong-in),전영욱(Jeon young-wook) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
Most of the train brakes depends on friction between wheels and tracks. This requires braking force reduced in order not to cause wheel slides since the friction decreases as the train speed increases and consequently results in extension of braking distance. The braking system called "Linear eddy current brake" or simply " Eddy current brake" is a braking system for making a brake independent from friction, which consists in creating electromagnet by coiling around shoes attached to bogies; having the shoes above the tracks approached to the tracks upon acknowledgement of a braking command; and authorizing braking force that is irrelevant to friction through magnetic repulsion between electromagnet attached to the tracks and train set by the use of the electromagnet"s magnet field characteristics. An electromagnetic attraction braking system that consists in pressing pole shoes attached to bogies against the tracks by using electromagnet"s attraction force is called "Electromagnetic track brake" or simply "Track brake". This paper has been prepared in purpose of studying technological tendencies of the eddy current brake and the track brake so that it can be utilized as fundamental data for commissioning Korean high-speed trains with the eddy current brake hereafter.
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.