• Title, Summary, Keyword: Railway vehicle

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Development an Structure and Control Algorithm of Propulsion Control for Driving Railway Vehicle in Both AC and DC Power Supply Section (AC 및 DC 전력공급구간 운전을 위한 도시철도용 추진제어시스템의 구조 및 제어 알고리즘 개발)

  • Lee, Chang-Hee;Lee, Ju
    • The Transactions of the Korean Institute of Power Electronics
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    • v.24 no.2
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    • pp.84-91
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    • 2019
  • This study proposes a AC/DC railway vehicle control algorithm that enables simultaneous driving of AC and DC power supply sections. In the Seoul metropolitan region, trolley voltage for railway vehicle is divided into AC and DC power supplies. Therefore, AC/DC railway vehicle algorithm is essential for driving on the outskirts of the region. This study analyzes resonance and beat phenomena for simultaneously running in AC and DC power supply sections, and proposes a control algorithm for railway vehicles with the application of damping and beatless controls based on this analysis. The performance of the proposed algorithm is verified by simulation and analysis of actual driving results.

A Study on Reliability Analysis & Determination of Replacement Cycle of the Railway Vehicle Contactor (철도차량 접촉기의 신뢰성 분석 및 교환주기 결정에 대한 연구)

  • Park, Minheung;Rhee, Sehun
    • Journal of Applied Reliability
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    • v.17 no.4
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    • pp.316-324
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    • 2017
  • Purpose: The purpose of this study is to determine the replacement cycle applied age replacement policy by reliability analysis based on railway vehicle contactor's failure history data. Method: We performed reliability analysis based on railway vehicle contactor's failure history data. We found a suitable distribution by goodness of fit test and predicted the reliability through estimation of scale & shape parameter. Considering cost information we determined the replacement cycle that minimize the opportunity cost. Result: Suitable distribution was the Weibull and scale parameter & shape parameter are estimated by reliability analysis. The replacement cycle was predicted and MTTF, $B_6$ percentile life were suggested additionally. Conclusion: We confirmed that failure rate type of railway vehicle contactor is degradation model having a time dependent characteristic and examined the replacement cycle in our country's operating environment. We expect that this study result contribute to railway operation agency for maintenance policy decision.

Linear Analysis of the Critical Speed for an Urban Railway Vehicle according to the Change of Suspension Characteristics (현가특성 변화에 따른 도시형 전동차의 임계속도 선형해석)

  • Park, Joon-Hyuk;Hur, Hyun-Moo;You, Won-Hee
    • Proceedings of the KSR Conference
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    • pp.251-257
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    • 2007
  • This paper describes the variation of the critical speed of an urban railway vehicle according to the change of suspension characteristics. Suspensions of a railway vehicle are composed of primary and secondary suspensions. Generally, main focus of the stability analysis has been the primary suspension. However, secondary suspension has large effects on the stability as well as the ride quality of a vehicle. In this paper, stability of an urban railway vehicle is discussed in relation to the variation of characteristics of both primary and secondary suspension. For this, modal analysis is carried out using a linear dynamic model of a half vehicle and a polynomial fit for Kalker's creep coefficients. Stability along with change of the effective conicity of a wheel is also investigated.

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Stability Analysis of Railway Vehicle Featuring MR Damper (MR 댐퍼를 적용한 철도차량의 안정성 해석)

  • Ha, Sung-Hoon;Choi, Seung-Bok;Yoo, Won-Hee
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.957-962
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    • 2008
  • This paper presents vibration control performances and stability evaluations of railway vehicle featuring controllable magnetorheological (MR) damper. The MR damper model is developed and then incorporated with the governing equations of motion of the railway vehicle which includes vehicle body, bogie and wheel-set. A cylindrical type of MR damper is devised and its damping force is evaluated by considering fluid viscosity and MR effect. Design parameters are determined to achieve desired damping force level applicable to real railway vehicle. Subsequently, computer simulation of vibration control and stability analysis is performed using Matlab Simulink.

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Stability Analysis of Railway Vehicle Featuring MR Damper (MR댐퍼를 적용한 철도차량의 안정성 해석)

  • Ha, Sung-Hoon;Choi, Seung-Bok;You, Won-Hee
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.18 no.7
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    • pp.732-740
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    • 2008
  • This paper presents vibration control performances and stability evaluations of railway vehicle featuring controllable magnetorheological(MR) damper. The MR damper model is developed and then incorporated with the governing equations of motion of the railway vehicle which includes vehicle body, bogie and wheel-set. A cylindrical type of MR damper is devised and its damping force is evaluated by considering fluid viscosity and MR effect Design parameters are determined to achieve desired damping force level applicable to real railway vehicle. Subsequently, computer simulation of vibration control and stability analysis is performed using Matlab Simulink.

Theoretical Study of Neutral Section Considering the Driving Characteristics of ATO Urban Railway Vehicle (자동운전 도시철도차량의 운전특성을 고려한 절연구분장치 이론적 고찰)

  • Lee, Jae-Bong;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.10
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    • pp.1470-1474
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    • 2013
  • In this paper, proper length of neutral section and neutral section system configuration is proposed to minimize accidents if ATO urban railway vehicle stops maintaining the leading vehicles in air section at regular intervals. When considering the minimum voltage sensing of power conversion unit in the urban railway vehicle, the effective length of 14,280[mm] with neutral section can be minimized damage due to high current because the urban railway vehicle is very little present chance compare neutral section with pantograph interval installed on a unit vehicle. In addition, uplift of catenary line and contact wire consider to minimize damage. The result of theoretical review, as the proposed neutral section shorter, isolated neutral section is effective than the integrated neutral section.

Study for The Lateral Displacement of Railway Vehicle (철도차량의 횡 변위에 대한 연구)

  • 양희주;오택열
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.535-538
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    • 1997
  • Studied in this paper was the lateral displacement of railway vehicle using the multi-body dynamic simulation program (VAMPIRE) and the BASS 501. The lateral displacement of railway vehicle is occurred by thc clearance between wheel flange and rail, the track irregularity, the property of each suspension of vehicle and the cant etc. The results of analysis shown that Vehicle is not interfere with subway platform in any conditions namely the tare and full load condition, the wheel. wear condition and the stationary and running of vehicle.

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Vibration Reduction of Pipe Line in Air-conditioner for Railway Vehicle (철도차량용 냉방기 배관계의 진동저감 연구)

  • You, Won-Hee;Jung, Yong-Ho;Koo, Jeong-Seo
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.22 no.10
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    • pp.925-931
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    • 2012
  • The air-conditioner for railway vehicle should have vibration durability in order to operate normally in vehicle running situation. KS R 9144(vibration test methods for railway vehicle parts) is used to verify the vibration durability. The specifications of compressor, condenser and evaporator for air-conditioner in railway vehicle are standardized, but the shape and structure of pipe lines are not specified. Because the air-conditioner handler produces the pipe line arbitrarily, sometimes the pipe line is broken during the vibration durability test. In this research the cause identification and solution of pipe line breaking problem in during the vibration durability test were studied for air-conditioner of railway vehicle(diesel multiple unit). It was found that the natural frequency of pipe line is related to the pipe line breaking by experiment. A new pipe line shape was introduced by using FEA in order to avoid the resonance. The prototype new pipe line was applied to air-conditioner and the natural frequency was measured by experiment in order to verify the resonance avoidance. The vibration reduction of air-conditioner with new pipe line was reviewed by comparing to the air-conditioner with original one.

A Study on the Application of TEO and STFT Signal Processing Techniques for Detection of Electric Railway Contact Loss (전기철도차량 이선 현상 검측을 위한 TEO 및 STFT 신호처리기법 적용에 관한 연구)

  • Jung, No-Geon;Park, Chul-Min;Lee, Jae-Bum;Park, Young;Shin, Seung-kwon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.11
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    • pp.1530-1535
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    • 2018
  • In this paper, A technique for detecting contact loss at the input power of a railway vehicle has been studied when the contact loss occurs in the feed system. The impedance of the actual railway line was applied to the modeling of the feed system, and modeling was performed based on the performance of the electric railway vehicle. The input voltage and current of the railway vehicle through modeling were analyzed by applying TEO and STFT signal processing technique.

The development of European railway vehicle body through analysis and test (해석 및 시험 평가를 통한 유럽형 전동차 차체 개발)

  • Kim Jeong-Hyun;Kim Sung-Jong;Park Geun-Soo;Park Hung-Soon
    • Proceedings of the KSR Conference
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    • pp.694-699
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    • 2003
  • Rotem Company has designed and manufactured a railway vehicle body according to the European standard EN 12663, which applies to all railway vehicles within the EU(European Union) and EFTA(European Free Trade Association) territories. EN 12663 specifies the loads vehicle bodies shall be capable of withstanding, identifies how material data shall be used and presents the principles to be used for design verification by analysis and test. The structural design of railway vehicle bodies depends on the loads they are subjected to and the characteristics of the materials they are manufactured from. However, the structural requirements of EN 12663 are very different from those of existing Korean and Japanese regulations and standards. Therefore, in order to fulfill the structural requirements, Rotem Company has carried out Finite Element Analysis (FEA) and has performed load tests on the vehicle body according to EN 12663. This research contains the results obtained by the analysis and the load tests. The analysis is carried out using I-DEAS Master Series 8 and specially designed test jigs and equipment are used for the load tests.

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