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홍용기(Hong Yong-Ki),정종덕(Chung Jong-Duk),편장식(Pyun Jang-Sik) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
Several kinds of Electrical Wires have been used in Electric Multiple Units(EMU) for the supply of electric power, supervision, and the propagation of control signals. These Electrical Wires must be inspected for safe and stable operation of EMU. The degradation diagnosis to estimate the integrity of Electrical Wires has recently been requested according to the long use of EMU. This paper describes on application of diagnosis method for EMU.
홍용기(Hong Yong-Ki),정종덕(Chung Jong-Duk),편장식(Pyun Jang-Sik) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
When the electric motor car was first introduced, an engineer, responsible for the work related to operation and a conductor for the announcement and management of entrances and the other services like as monitoring the passengers in the platforms used to take together the train for passengers" safe. As new technologies developed and the urban transit system had the automatic driving facilities, automatic door switch and broadcasting systems, to solve the financial problems, most subway systems introduced the one-man operation system. To curtail the operating expense through automatic control and operation for the economical efficiency, the crewless driving system was introduced abroad around 1970 on the light weight train and Japan started the crewless driving system in 2005, Germany started it in June 2008. We examine system requirements of the system and methods to construct safe systems that would be introduced, suitable for one-man operation system or crewless driving system through the surveys and analysis of driving state and the systems.
홍용기(Yong-Ki Hong) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.5
장래, 철도기술개발은 열차의 탈선, 충돌 및 화재 등으로 일어나는 철도삭를 예방하기 위한 안전에 관한 기술과제, 편리성 향상에 관한 기술과제(기존선 고속화 , 고속 철도망 구축, 저 진동 철도개발, 연계수송, 저비용 유지보수), 도시철도에 관한 기술과제(유지보수성, 도시철도 혼잡완화, 시간제약 철폐, 거점역간 연계), 철도를 이용한 물류에 관한 기술과제(고밀도/소량수송, 연계수송, 고속 화물 수송, 지능철도기술개발) 등의 개발이 이루어질 것으로 기대된다. Future, developemtn of railway system is expected to be made technological development such as technical project on the railway accident(derailment, collision, fire, etc.) prevention, technical project on the improve convenience(the speed-up of conventional railway lines, high-speed rail network, low vibration railway, transportation connection, low cost maintenance), technical project on the urban railway(maintainability, congestion alleviation, time constraints elimination, intro-base connection), technical project on the railroad logistics(higher volume/small quantity transport, transportation connection, high-speed freight transportation, intelligent railway technical development).
홍용기(Yong-Ki Hong),편장식(Jang-Sik Pyun) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11
철도기술 현장에서는 국가기술검정자격 이외에 철도종사자들에게 열차운행안전과 직접 관련이 있는 모든 기술분야에서 차량을 제외하고는 전문자격을 도입시행하고 있다. 철도차량은 승객이 직접 이용하는 것으로 안전과 가장 가까움에도 불구하고 자격이 없이 정비에 임하고 있는 것은 안타까운 일이다. 항공기나 자동차, 선박 등은 자격자가 정비를 하거나 정비상태를 확인하는 자격제도를 시행하고 있다. 이 논문에서는 철도차량의 종류, 보유량, 종사자, 운행상태, 정비업무 등을 파악하여 철도차량정비의 자격제도를 도입하는 방안을 살펴보고자 한다. Above national technical qualification examination, professional qualification for railway workers is introduced and operated in every technology field relevant to train running safety except for vehicle. The approximate repair without qualification is very dangerous because railroad vehicle is directly related to safety of passengers. In case of aircraft, cars, ships, etc., workers who have qualification repair their vehicles and check the status of the maintenance. In this paper, it introduces ways of qualification system introduction in field of railway vehicles maintenance through analyzing kinds of railroad cars, stocks, workers, driving conditions, maintenance work.
철도차량용 디스크 브레이크 라이닝의비교시험 연구 : KRRI-CARS
홍용기(Hong Yong-Ki),권성태(Kwon Sung-Tae),정종덕(Chung Jong-Duk),김정남(Kim Jung-Nam) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
The inter-laboratory comparison test which is demanded on the authorized test of ISO/IEC 17025 is the program to guarantee the confidence of test result. This paper, as a part of the inter-laboratory comparison test between South Korea and China, is refered to the characteristic of friction coefficient of disk brake lining for rolling stock according to disk type. Brake tests were carried out under constant brake force and operating sequence by using dynamo-tester according to disk and disk lining types. To establishing the confidence of test result, we calculated A type uncertainty about friction coefficient and investigated the factors about the variation of friction coefficient.
철도차량의 진동과 변위로부터 유추할 수 있는 탈선가능성에 관한 연구
홍용기(Hong Yong Ki),함영삼(Ham Young Sam) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
The important factor to evaluate the running safety of a railway vehicle would be the interaction force between wheel and rail(derailment coefficient), for which is one of important factors to check the running safety of a railway vehicle that may cause a tragic accident. Especially, a newly developed vehicle that first runs commercially requires necessarily the measurement and evaluation of derailment coefficient for securing the safety of a vehicle while measuring the derailment coefficient in view of securing running safety could be the more important factor than any other factors. In this paper, examined possibility that can forecast derailment possibility to behavior of only vibration and displacement by measuring vibration acceleration and displacement in vehicles that travel actuality rail track, and compares with data of wheel load/lateral force result.
홍용기 ( Yong-ki Hong ),전승환 ( Seung-hwan Jeon ) 한국고등직업교육학회 2013 한국고등직업교육학회논문집 Vol.14 No.2
The aim of this study is understanding of the concept of learning outcomes and in the process of implementing learning outcomes and developing curriculum. Learning outcomes are for educational Institute an important part of the national competency standards. Students acquire must competences through learning activities. The learning activities must be related to the contents of the studies undertaken. The key to the entire system is a clear and applied definition of competences and their effective link with learning activities. The curriculum development in competency based is the use of learning outcomes and competence based learning offers new possibilities to university. A more competence based curriculum consisting of modular courses enhances the possibility for universities to attract student combining study and work.