• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.440-443
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• 2005

To improve the riding comfort of high speed trains, it needs active suspension system for railway more and more. In Japan, the high speed train, Shinkansen has adopted semi active suspension system and now it is running in the main trunk. In Korea, Koeran Train Express (KTX) is opened to commercial traffic and Korea High speed Railway (HSR350) is being developed. So the vibration control of the high speed train becomes important. In this paper, we introduce technical skill of Japanese semi active suspension Shinkansen to be helpful to the related researcher.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.393-397
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• 2005

Since the braking system of rolling stock is directly linked to it's safety, ensuring reliability of braking system and evaluation of performance of it are very important. To develope the performance of braking system, it is required advanced technology and gradually various factors in the field test result. This study is designed to analyze the air pressure control about braking force in rolling stock, also, by comparing braking force of high speed railway with that of high speed train. This paper suggests to establish a method of computation of braking force form the air pressure control. And The high speed train researches into patterns of braking system such as the train of speed up and introduction of electric and pneumatic braking system.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2004년도 추계학술발표대회 논문집
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• pp.3-5
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• 2004

In order to speed up basic concept is to enhance high speed, curve limit speed, cross limit speed, acceleration/deceleration speed. It is important to optimal interface fundamental technology of vehicle, rail, electrical power, and signal system. Tilting train has advantage minimizing investment cost of infra railway system for increasing train limit speed in curve. the developed tilting train should be operated to commercial service speed 180Km/h of 200Km/h at KNR upgrade railroad. This paper proposed the basic model of system engineering for developing of TTX, tilting EMU (maximum operation speed : 180km/h) with speed-up of conventional railway system.

• 한국철도학회논문집
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• 제9권4호
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• pp.419-424
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• 2006

In this paper we study on a method to predict and to demonstrate the reliability of the Korea high speed train control system in quantitative point of view. For the prediction of the reliability in train control system which is composed of electronic parts, Relax Software 7.7 automation tool is employed and MIL-HDBK-217 Handbook that is a standard for the prediction of the failure rate in electronic components is used. Mean Time Between Failure (MTBF) is predicted based on the failure rate of the subsystems, State Modeling and Markov Modeling method is used to express a reliability function of the train control system composed by hardware redundancy as a function of time. We propose a Reliability Test which is performed on the level of the subsystems and Failure Report, Analysing, Correction action system which use the test operation data to prove the predicted reliability.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 춘계학술대회 논문집
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• pp.511-518
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• 2000

The high speed train service will be offered for high-quality transport service in existing railway by Korean National Railroad(KNR). Therefore, this paper presents the results of analysis carried out to determine the dynamic response characteristics of deck plate girder bridges which are representative elevated structures of existing railway and to evaluate their suitabilities for supporting Korea Train Express(KTX) trainsets in the speed range 0-250 km/h. Their dynamic characteristics are analyzed concerning structural safety, train-operation safety and passenger comfort. The simplified method for 2-dimensional train/track/bridge interaction analysis is utilized in the analysis of dynamic behaviors of deck plate girder bridges.

• 한국안전학회지
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• 제27권6호
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• pp.31-42
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• 2012

Urban transit vehicle that uses electrical energy, is faster, safer and energy-efficient public transit than other means. As a Research method, the Matlab/Simulink are used to modeling a regenerative brake-capable train, and actual parameters such as powering and braking characteristics, all kinds of resistance, passenger load, velocity, gradient, radius of curve etc and powering and breaking commands per time or distance are inputted to train's dynamic equation, then a simulation program is made and used to yield train driving pattern and driving time and the amount of driving energy used thereby at auto and manual operation and at all sector.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.555-560
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• 2008

Korean Train Express (KTX) has been commercially operating and achieving elevation on transport capacity since 2004. And HSR-350x was developed and succeeded in testing of running over 350km/h. The new high-speed train development project, HEMU-400x project, has started since last year. To develop the train system, it is important how we progress the configuration of the system, design, manufacturing and test verification. The authors devised the performance estimate and verification process of the HEMU-400x and the project is performed following the developed processes.

• 대한교통학회지
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• 제33권6호
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• pp.564-574
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• 2015

서울 지하철 9호선의 급행열차에 대한 높은 인기에서 볼 수 있듯이, 광역 도시철도 급행화에 대한 수요는 꾸준히 증가하고 있다. 하지만, 기존 노선에 건설된 노선을 급행화하기 위해서는 인프라를 추가적으로 설치하여야 하며 많은 비용이 소요된다. 이러한 문제점을 극복하기 위해서는 유치선, 건넘선 등 기존에 구축된 인프라를 최대한 활용해서 대피역의 역할을 해야 할 필요가 있다. 이 경우에 급 완행 열차의 교차점을 줄이기 위해, 기존 열차는 급행열차로 활용하고 가 감속도를 증가시킨 고성능 열차를 완행 열차로 투입하는 방법이 있지만 실현 가능한 고성능 열차의 가 감속도와 최적의 가 감속도를 분석하는 현재까지 연구는 진행되지 않았다. 본 논문에서는 기존 시설을 최대한 활용하여 급행화 방안을 추진할 때, 고성능 열차의 실현 가능한 가 감속도의 범위를 수식적으로 분석하고 그것을 서울지하철 3호선에서 검증한다. 실험결과는 열차 간 최소간격이 40초 이하일 때, 실현 가능한 가 감속도의 범위가 존재한다는 것을 보여준다.

• 한국소음진동공학회논문집
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• 제12권6호
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• pp.431-436
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• 2002

The interior sound pressure level of the Korean high-speed train(KHST) is predicted by geometrical acoustic method. For the Purpose of assuring the prediction of Interior noise of KHST by the geometrical acoustic scheme, calculated sound level values of the Korean train express(KTX) by Identical geometrical method are compared with measured values of KTX prototype vehicle by experiment. Contribution of individual sound source of KHST vehicle Into the interior response positions is calculated and sound sources are classified in influential order. Hence, it is reasonable approach to reduce sound power of most contributing noise source first. Sensitivity of the interior response position's sound pressure level (SPL) with respect to train wall sections' transmission loss are carried on and acoustically sensitive spot is identified, for example window area for passenger cabin case. Those contribution and sensitivity analysis results are suggested to design quieter train efficiently.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2306-2309
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• 2011

With the opening of 1st phase and 2nd phase in Gyeongbu High Speed Line, KTX(The Korea Train Express) and Sancheon(2nd generation of High Speed Train) are operating commercially on entire line. Gyeongbu High Speed Line can be separated as several sections. In this entire line, a few types of train has operating by it's own pattern. However, commercial speed of the line compared with the maximum speed of Train is rather slow. Through this study, I found the reason of the slow speed on the Catenary system and suggested a solution.