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이우동(Lee Woo-Dong),신정렬(Shin Jeong-Ryol),김길동(Kim Gil-Dong),한석윤(Suk Youn-Han),박기준(Park Kee-Jun),홍재성(Hong Jai-Sung),안태기(Ahn Tai-Ki),이호용(Lee Ho-Yong),김종욱(Kim Jong-Wook) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
Dae-gu subway accident raise whole points in connection with safety facilities and operating of national urban transit system like rolling stocks, facilities, management of human. Rolling stock is made every effort for improvement of performance, guarantee of comfortableness, insurance of economical efficiency. But Security like safety of fire is not thoroughgoing enough. Especially, interior material has used although it is not prove its degree of safety it is a main cause of Dae-gu subway accident. Safety regulation of urban transit vehicle that legislate for security in March 2000 does not applied manufacturing vehicles before in 2000. It has be prescribed in the regulations that incombustibles must be used. But detailed test standard related with incombustibles is not prescribe. Thus that regulation be required reinforcement of detailed test standard. Main cause of Dae-Gu subway accident is a fire in vehicle. However, many defects are found in infrastructure and operating vehicle of urban transit, such as inexperienced disposal of driver and CCC in early stage of the fire accident, unskilled opening and closing doors, insufficient escape facilities and safety facilities of a station house and tunnel, and incomplete communication system between vehicle and CTC, extraordinary step. Thus the aims of this study are prevention of urban transit accident, improvement plan of safety driving, and proposal of quick action plan through analysis of total faculty of vehicle.
추진인버터 시험을 위한 실시간 부하 시뮬레이터에 관한 연구
김길동(Gil-Dong Kim),신정렬(Jeong-Ryol Shin),이우동(Woo-dong Lee),한석윤(Suk-Youn Han),박기준(Kee-Jun Park) 한국철도학회 2004 철도저널 Vol.7 No.1
A newly-built inverter has to undergo a series of stress tests in the final stage of production line. This can be achieved by connecting it to a dynamometer consisting of a three-phase machine joined by a rigid shaft to a DC load machine. The latter is controlled to create some specific load characteristic needed for test. In this paper a test method is proposed, in which no mechanical equipment is needed. The suggested test stand consists only of a inverter to be tested and a simulator converter. Both devices are connected back-to-back on th AC-side via smoothing reactors. The simulator operates in real-time as an equivalent load circuit, so that the device under test will only notice the behaviour of a three-phase machine under consideration of the load. In oder to prove rightness of the suggested test method, the simulation and actural experiment carried out emulation for a 2.2 kW induction motor.
철도차량장치의 점착력 추정에 의한 Anti-Slip 제어
김길동(Gil-Dong Kim),이호용(Ho-Yong Lee),안태기(Tae-Ki Ahn),홍재성(Jai-Sung Hong),한석윤(Suk-Youn Han),전기영(Kee-Young Jeon) 한국철도학회 2003 철도저널 Vol.6 No.4
In electric motor coaches, the rolling stocks move by the adhesive effort between rail and driving wheel. Generally, the adhesive effort is defined by the function of both the weight of electric motor coach and the adhesive effort between rails and driving wheel. The characteristics of adhesive effort is strongly affected by the conditions between rails and driving wheel. When the adhesive effort decreases suddenly, the electric motor coach has slip phenomena. This paper proposes a re-adhesion control algorithm which uses the maximum adhesive effort by instantaneous estimation of adhesion force using load torque disturbance observer. Based on this estimated adhesive effort, the re-adhesion control is performed to obtain the maximum transfer of the tractive effort.