• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.176-179
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• 2010

본 논문에서는 고속철도 폐색분할 설계를 위한 요구사항을 도출하였다. 경부고속철도 열차제어시스템은 고정폐색방식으로 KTX가 차량의 물리적 특성, 선로환경 등을 고려하여 분할된 폐색구간을 진입할 때, 선행열차의 점유폐색을 기준으로 궤도회로로부터 해당폐색의 열차 진입/진출속도, 운행가능거리, 감속도 등의 운행정보를 전송받는다. 그리고 차상열차제어시스템은 지상에서 수신한 운행정보를 통해 열차제어곡선을 생성하고 열차가 해당폐색의 기준속도를 초과했을 경우, 비상제동명령을 내려 열차의 안전한 운행을 보장한다. 폐색분할은 열차의 안전한 운행을 위해 고정폐색방식에서 수행되는 기본설계로, 폐색분할 설계 결과는 궤도회로를 비롯한 지상열차제어장치의 수량을 산정하는 기준이 된다. 따라서 본 논문에서는 최고운행속도 300km/h로 운행하는 경부고속철도 폐색분할 설계를 기준으로 폐색분할을 위한 입력요구사항에 대해 분석하였다.

• Journal of the Korean Society for Railway
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• v.10 no.6
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• pp.660-664
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• 2007

Korea High-speed Railway (HSR-350x) was developed by Korean government, several institutes, and related companies. HSR-350x was investigated its performance and tested at the high speed line. In 2004 December, HSR-350x was run over 350km/h and proved its running performance. And Korean Train Express (KTX) served the commercial traffic for 4 years. These high speed railways have 12 motors to transfer the traction effort or the braking force. To obtain the load of the transfer shaft, it is necessary to measure the transferred torque of the shaft. In this paper, authors propose the construction the measurement system fur monitoring the force transferred to the train from the motor The system was installed to the tripod shaft which is located between the reduction gears and it measures the mechanical load directly.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.518-523
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• 2008

Using network communication, KTX OBCS is KTX's core device which inspects operation status of various electric equipments and supports driving command, train control, train's maintenance, train crew's driving. Since this device is manufactured as specialized system, being dependent on TGV manufacture specification and France's high speed train operation method, actual technic transfer is difficult. Therefore, there are many difficulties, since most of interface signals are connected with OBCS when function improvement, maintenance, various electric equipments(propulsion control device, auxiliary power supply device, door control device etc.) are replaced with localized ones, which are required in operational view after introduction of KTX. Ergo, this study would like to contribute to function improvement and maintenance's efficiency, furthermore to realize technical independence, escaping from dependency of developed foreign technology in high speed train and electric equipments, through KTX OBCS' function analysis and mutual interface information analysis with peripheral device(driver console, PID system, fault display device, various electric equipments).

• Proceedings of the KIEE Conference
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• 2003.07b
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• pp.1326-1328
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• 2003

이 논문은 ATS(Automatic Train Stop)의 신호를 측정하기 위해 개발된 측정시스템을 소개하고, 측정 결과를 고찰하여 향후 연구 방향을 제시하고자 한다. 기존선 고속화 요구에 따른 신호보안설비의 개선이 요구되지만 기존의 설비를 전면적으로 교체하기에는 기간 및 많은 비용이 요구된다. 그러기 위해서 기존의 ATS에 대해서 성능을 점검하고 고속화를 위한 개선점을 찾아 신호설비 개량전에 단계적 고속화가 필요하다. 그러므로 본 논문에서는 신호 고속화 시스템을 위해 기존신호 시스템의 특징을 조사하였다. 이 논문에서는 NI사의 상용 A/D 보드와 LabVIEW를 사용하여 측정시스템을 만들어 측정하였다. 측정결과는 기존의 ATS의 신호가 고속에서는 응동시간이 문제가 있으며, 고속화를 위해서는 일부 개량이 필요하다. 그러나 승객의 안전에 관련된 사안이므로 더 다양한 방향에서의 고찰이 필요할 것으로 보인다.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.1681-1698
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• 2011

According to the demands of the times, Inchon international airport railroad opened up step by step but It is situation that much government subsidies are paid because It does not competitive power with road traffic by decline of schedule speed. Inchon international airport railroad users will convert by other transportation and minimize damage their time as travel time is prolonged. Therefore, need high speedization of airport railroad, this may act big role competitive power security as well as airport railroad activation with another public transportation. Thus, this paper suggests that a high speedization possibility section in the sections of airport railroad and train speed elevation effect analysis by roadbed, railroad, system improvement and the most efficient operation intervals analyzing each vehicles (AREX (120km/h), KTX (230km/h), EMU(Electric Multiple Unit, 180km/h) train running pattern.

• Journal of Sensor Science and Technology
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• v.12 no.4
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• pp.170-175
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• 2003

The korean high speed train(350km/h), composed of 7cars that are 2 power cars, 2 motorized car and 3 trailer cars, has been developed and is under on-line test. To verify the design requirements about the functions and traction performances of this train, KRRI(Korea Railroad Research Institute) decided to evaluate traction performances of the train during on-line test. For this purpose, such as torque, velocity, voltage and current, must be measured. KRRI has developed the measurement system that can be measured vast and various signals effectively. In this paper, we introduce traction performances of korean high speed train. The traction measurement items are focused on the verification of motor block performances. Motor block are consist of 2 motor. For this test, we verified traction performances of korean high speed train.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.13 no.2
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• pp.165-178
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• 2000

The simplified model for 3-dimensional analysis of vehicle-bridge interactions is presented in this study. By using the analysis model which includes the eccentricity of axle loads and the effect of the torsional forces acting on the bridge, the more accurate analysis results of the behavior of the bridge can be obtained. The equations of kinetic energy, potential energy and damping energy are expressed by degrees of freedom of the vehicle and the bridge. And then by applying Lagrange's equations of motion, the equations of motion of the vehicle and the bridge are obtained. By deriving the equations of forces acting on the bridge considering the vehicle-bridge vertical interactions and also by identifying the position of vehicle as time goes by, mass matrix, stiffness matrix, damping matrix and load vector of vehicle-bridge system are constructed in accordance with the position of vehicles. Then using Newmark's β-method(average acceleration), the equations of motion for the total vehicle bridge system are solved.

• Proceedings of the KIEE Conference
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• summer
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• pp.1325-1327
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• 2004

인구가 증가하면서 인간의 생활활동 범위가 증가되었고 이에 따라 운송시스템에 대한 수요가 크게 증대되고 있다. 그러나 물류 이동에 필요한 여러 가지 제반시설은 이를 충족시키지 못하고 있으며, 이로 인하여 현재 국내의 물류수송효율은 최악의 상황에 직면해있다. 이로써 대용량의 수송능력을 담당하는 철도차량 운송 시스템에 대한 수요가 급증하게 되었다. 따라서 이에 대비하고자 많은 신규 노선을 계획하고, 이와 함께 신설되는 노선에 대해서는 시스템 운영 효율의 극대화를 위해 노선별로 고속전철과 지하철, 경전철, 틸팅차량, 그리고 자기부상열차 시스템 등 여러 가지 방식이 검토 중에 있으며 차량에 가장 적합한 추진시스템을 설계하는 것이 차량의 성능에 크게 향상시킬 수 있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.7
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• pp.23-30
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• 2016

ccording to the airport railroad linkage facility expansion project constructing a connecting line to the airport railway and improving the signal system and Gyeongui Susaek Station, a high-speed train is able to run directly from Gyeongbu and Honam to the airport railway. According to mixed operation of high-speed Korea Train Express (KTX) and Airport Railroad Express (AREX) trains, to establish ERTMS/ETCS L1 ATP to operate the KTX train, the signaling system of the AREX train is the same as the existing ATC/ATO, but its operation became impossible because the high-speed train causes mutual interference between the "high-speed train (KTX) and AREX ground signaling equipment" and between the "AREX train and KTX (high-speed train) ATP ground equipment." Thus, it was necessary to have a supplemental technical interference analysis comparing the characteristics of the AREX beacon and the KTX balise. So, we resolve the problems of mutual interference between the "high-speed train (KTX) and AREX ground signaling equipment" and between the "AREX train and KTX (high-speed train) ATP ground equipment" with a test using an actual train, and we confirm the technical validity with three types of test module.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.284-290
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• 2009

As the increased importance is placed on the new transit systems owing to the environmental pollution caused by the road traffic congestion, the policy for the introduction of the new transit systems as an alternative solution to ease the heavy burden of the construction expenses is being actively established. Since the explicit recognition of such transit systems and the review on the method of its adoption have been a pressing matter in the light of reducing the pending traffic congestion, the development of the rolling stock systems in modes of new transportation has been made in various ways taking into consideration the regional circumstances to alleviate traffic congestion, and offer a more efficient service with the application of their intrinsic characteristics. Such systems also have been developed as a mix of punctuality for railway systems operating on the runway and flexibility for buses. This paper, therefore, deals in more detail with 3 modes of systems such as low-floor articulated buses, GRT(Guided Rapid Transit) and tram cars, and studies the overseas cases of the operation of those systems involving both negative and positive aspects.