• Title, Summary, Keyword: train speed

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Calculation and application of the location-based speed profile of ATO considering the speed limitation and the jerk limitation (가속도한계 및 저크한계를 고려한 열차자동운전장치의 위치기반 속도프로파일의 계산 및 적용)

  • Yoon, Young-Hwan;Um, Jung-Kyou;Han, Jae-Mun;Cho, Yong-Gee
    • Proceedings of the KSR Conference
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    • pp.1685-1690
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    • 2010
  • This paper describes the calculation and application of the speed profile for the train speed control when the train is operated by ATO(Automatic Train Operation). We propose a speed profile calculation method considering the speed limitation and the jerk limitation, in order to maintain the quality of the train automatic operation. In previous works, ATO calculates a desired speed profile along the time, and controls the train to follow the profile. In this case, it may be hard to follow the restrictive speed along the location or to stop the train with a low location error, because of the difference between the desired location at each time and the real location of the train due to the control error. In the proposed method in this paper, we calculate a desired speed profile along the time considering the speed and jerk limitation first, and derive a speed profile along the location using it. If the restrictive speed profile is changed or the train speed strayed from the speed profile, ATO system calculates new speed profile and applies it immediately. Because ATO system controls the train speed based on the train location, the accuracy of the train location control can be improved. A simulation system for the test of the automatic train operation using this method is designed.

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The Study for Speed-up of Main Line by High Speed Train (기존선의 고속전철 연계운용으로 고속화 방안)

  • 박광복
    • Proceedings of the KSR Conference
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    • pp.105-113
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    • 2001
  • This report was studied about speed-up for main line of KNR(Korea National Railroad) by High Speed Train. The maximum speed of Kyun-Pu line was recorded a 140km/h by Saemaul train in 1985 and the average speed its is a 107km/h now. For operation KTX Kyun-Pu High Speed Train and G7 Korea High Speed Train in KNR line, this report was studied about operation status of High Speed Train in advanced countries, operation situation of train in KNR line and plan of speed-up for main line.

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A Study of Systematization for Train Control Technique (열차제어기술 체계화 방안에 대한 연구)

  • Lee, Jae-Ho;Shin, Duc-Ko;Lee, Kang-Mi
    • Proceedings of the KSR Conference
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    • pp.2010-2016
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    • 2009
  • Before introducing high speed train, train signal system was operated passively depending on a driver by signal lamp display. Now it is changing to onboard signaling system because of train speed increased(conventional track is 230km/h, high speed track is 380km/h), high speed. low speed freight train operation mixed, operation for high speed train in conventional track and dense operation. ie. ETCS(European Train Control System) Level 1 is introducing. Also, in case of high speed train, the train control system of France was introduced and has operated from 2004, now we have a difficulty for rising speed more than 300km/h because of commercial operation speed limited as 300km/h. Therefore, it need to establish the train control technique according to trackside surroundings and develope standard system like European ERTMS/ETCS, China CTCS(Chinese Train Control System), Japan D-ATC(Digital Automatic Train Control). In this paper, we derive the systematization method for Korea train technique by network-oriented, information-oriented, intelligence-oriented and combination-oriented corresponding train development direction. Proposed method has a merit to prevent cross by mixed operation with existing system and improvement after validity demonstration and system development and supply train system to meet user requirement in exporting.

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A Study for Automatic Train Speed Regulation Algorithm of ATO (ATO 장치의 자동 열차속도 조절 알고리즘에 관한 연구)

  • 김중환;강리택
    • Proceedings of the KSR Conference
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    • pp.210-218
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    • 1998
  • The ATO(Automatic Train Operation) System is used for train operation instead of drivers. It is interfaced with TCMS(Train Control and Monitoring System) and ATC/TWC system in the train and wayside facilities. In this paper describes configuration of ATO, specification of ATO hardware, construction of ATO software and the algorithm fur automatic train speed regulation in the carborn ATO system. ATO Application Software is consist of ART, SPR, REG, SRV and PSM tasks. ART task is main control part of the ATO that determine ATO control, ATO mode, state transition. SPR determine speed reference according to train motion status, track data, train data and restricted train speed. REG task regulated train speed form the starting of one station to the precision stop at the other station under the result of ART and SPR tasks. In this paper, a algorithm for the train speed regulation while running is described.

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A Comparative Study on Crashworthiness for Motorized Trailer of Korean High Speed Train in planing (한국형 고속전철 동력객차 설계초안 모델의 충돌특성 비교연구)

  • 김헌영;이종근
    • Proceedings of the KSR Conference
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    • pp.534-541
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    • 1999
  • The purpose of this study is to suggest the effective analytical procedure using finite element model for the crashworthiness of motorized trailer of high speed train. In the analysis of end-on collision of Motorized Trailer for Korean High Speed Train., deformed pattern, rigidwall force, internal energy and each part section force is obtained. From those indices, we evaluate crashworthiness of motorized trailer for Korean High Speed Train in planning. The numerical results are applied to the design of motorized trailer of Korean high speed train.

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VCB Control Algorithm Verifications of Korean High Speed Train (한국형 고속전철의 VCB 제어 알고리즘 검증)

  • Jeon, J.W.;Jeong, P.K.;Lee, J.H.;Park, D.Y.;Kim, Y.J.;Lee, B.S.
    • Proceedings of the KIEE Conference
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    • pp.1362-1364
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    • 2000
  • This paper presents the control algorithm verification process for VCB (Vacuum Circuit Breaker) of Korean High Speed Train. In order to enhance the reliability of the control algorithm, the verification process must be performed. The verification is conducted by comparing the pre-designed control algorithm with the pre-planned scenario by simulation tools such as SDL and MSC. This verification process will be applied to the other control algorithms of various control units of Korean High Speed Train.

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Analysis of the Effect of Wind on the Dynamic Behavior of High Speed Train (바람이 고속전철의 동적 안전성에 미치는 영향 분석)

  • 김영국;박찬경;박태원;배대성
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.11 no.8
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    • pp.349-356
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    • 2001
  • The dynamic behavior of high speed train is very Important because the railway should be safe and Is satisfied tilth the rode comfort of passengers. The train is composed of many suspension components. such as 1st springs, 1st dampers, 2nd springs and 2nd dampers, that have an influence on the dynamic characteristics of high speed train. Also, the wheel/rail shapes, the track conditions and geometry and many environmental factors, such as rain, snow and wind. affect the dynamic behavior of high speed train. This paper reviews the effect of wind and track conditions on the dynamic behavior of high speed train. The VAMPIRE program Is used for this simulation. The result of simulation shows that the high speed train should not be operated when the wind velocity is beyond 34.5 m/sec.

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Analysis of Aerodynamic Noise in High Speed Trains

  • Kim, Tae-Min;Kim, Jung-Soo
    • International Journal of Railway
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    • v.4 no.3
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    • pp.70-73
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    • 2011
  • Controlling the exterior and interior noise emission has become an important issue in the research and development of high speed trains. As the operating speed of the train increases, the noise emission characteristics are expected to deviate from that of the existing trains due to several changes in the basic train layout. For train speed in excess of 350 km/h in particular, the aerodynamic noise component starts to exceed the structure-borne noise component, and even an incremental speed increase is accompanied by a rapid elevation in the noise level. The present study presents an engineering approach for predicting the aerodynamic noise level at the design stage for high speed trains. The experimental noise measurements from test run of Korean high speed train under development are presented as a partial validation of the proposed approach. While the overall aerodynamic noise can be cast in a single power law relationship against the train speed, different parts of the train show power law relationships unique to each component.

Characteristics of Track Behaviors according to Accelerated Tilting Train Speed (틸팅차량 증속에 따른 기존선 궤도의 거동 특성)

  • Shin, Tae-Hyoung;Choi, Jung-Youl;Eum, Ki-Young;Park, Yong-Gul
    • Proceedings of the KSR Conference
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    • pp.1653-1661
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    • 2008
  • A trial run of locally-developed tilting train has been in process on Chungbuk line since the test vehicle was first produced. For the system stabilization, interface verification among the systems including track, structure, catenary and signaling system, not to mention the rolling stock, is very crucial. In the area of wayside structure, the stability of track structure and train run shall be evaluated through the review of impact by increased speed by developed train on track structure. The study thus was intended to evaluate the impact on track while a tilting train is running the conventional line(ballast track), which is vulnerable to accelerated train speed. The evaluation of tilting train test running the part of Honam line was conducted to identify the impact on existing track performance by tilting train. To identify the performance of each part of track components while tilting train and high speed train were running the existing line, wheel load, rail bending stress, vertical displacement of rail and sleeper were compared so as to evaluate the expected impact by tilting train for improving the train speed.

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Vibration Velocity Response of Buried Gas Pipelines according to Train Speed (지중 매설 가스 배관의 열차 주행 속도에 따른 진동 속도 특성)

  • Kim, Mi-Seung;Sun, Jin-Sun;Kim, Gun;Kim, Moon-Kyum
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.561-566
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    • 2008
  • Recently, because of development of the high speed train technology, the vibration loads by train is significantly increased ever than before. This buried gas pipelines are exposed to both repeated impact loads, and, moreover, they have been influencing by vibration loads than pipeline which is not located under vehicle loads. The vibration characteristic of pipeline is examined by dynamic analysis, and variable is only train speed. Since an effect of magnitude of vibration loads is more critical than cover depth, as increasing the train speed, the vibration speed of buried pipelines is also increased. The slope of vibration velocity is changed by attenuation of wave, at train speed, 300 km/h. From the analysis results, the vibration velocity of pipelines is satisfied with the vibration velocity criteria which are established by Korea Gas Corporation. The results present operation condition of pipelines under rail loads has fully sound integrity based on KOGAS specification.

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