• Proceedings of the KSR Conference
• /
• 2000.05a
• /
• pp.71-77
• /
• 2000

The system is defined as groups which are operative, dependentive, configurational of all each others. In oner to develop the AGT system efficiently, the system engineering process has to be organized It will be started by the configuration of WBS and PBS. A WBS is a method of naming and organizing all of the wok elements to be done for a projects. It completely defines the projects, is normally prepared in an hierarchical during design and project execution. A number, or alpha-numeric identification, is assigned to every WBS elements. Also a hierachy of system physical components should be established. It named to PBS, which is a method of naming and organizing all of the physicals elements to be done far a projects. Therefore we will propose the WBS and PBS to fit for AGT system in this reports.

• Proceedings of the KSR Conference
• /
• 2005.11a
• /
• pp.197-202
• /
• 2005

On December 2001, Yongin Light Rapid Transit was started with the Notification of Basic Plan for Private Infrastructure Investment Project and promoted as BTO configuration to effectually cope with the rapid increase of traffic demand in Yongin City and establish pleasant and green urban traffic system to connect with New Boondang Line to diversity traffic demand around roads. On May 27th, 2005, it was applied authorization of detailed plan and the .First Light Rapid Transit in Korea shall be started construction on Nov, 2005, and completion on May. 2009. This Thesis will introduce the Detailed Design for Yongin Light Rapid Transit.

• Proceedings of the KSR Conference
• /
• 2006.11b
• /
• pp.964-967
• /
• 2006

Korea Railroad Research Institute (the following 'KRRI') built AGT test line in Gyeong San-city, Kyongsang-bukdo province, Korea on August, 2004. This test line is exclusively used for the test of the driverless rubber-tired AGT system, and applied with research result of AGT System Development Project like vehicles, power supply, control and signaling, track and infrastructure system. The test line is available for the test of rubber tired AGT system's performance, function, safety. In this paper, we described the operation system of test line for the test of performance, safety, reliability, and also system operation in emergency. Finally we present the operation result of test line.

• Proceedings of the KIEE Conference
• /
• 2003.07b
• /
• pp.1267-1269
• /
• 2003

경량전철시스템의 개발시험을 수행하기 위하여 시험선을 구축하는데 있어서 각 하부시스템별로 요구사항을 도출하고 이를 설계에 반영하여야 한다. 이에 따라 본 논문에서는 신호제어시스템에 대하여 성능 및 기능시험을 감안한 요구사항을 도술하고 시험환경 및 시험조건에 따라 연차 검지 및 안전제동거리의 시험방법에 대해 검토하여 최적의 시험기법을 제안하고자 한다.

• Proceedings of the KIEE Conference
• /
• 2000.11b
• /
• pp.392-394
• /
• 2000

열차의 신호 시스템은 열차의 안전운행에 있어 매우 중요한 기술로, 고도의 기술적 능력과 경험이 요구되는 분야이다. 그 동안 당사에서 개발한 ATS(Automatic Train Stop)를 제외한 대부분의 철도 제어 신호 시스템은 국내에서는 개발이 잘 안되었고, 설사 개발되었다 해도 실제 운행 실적이 없다 하여, 철도나 지하철 및 경량 전철에 적용하는 데에 어려움이 많았다. 이에 본 논문에서는 당사의 기술과 외국의 협력업체의 기술을 결합하여 철도 신호 보안 시스템의 최적 구축 방안에 대해 연구하였다.

• Proceedings of the KSR Conference
• /
• 1998.11a
• /
• pp.421-428
• /
• 1998

Sensitivity analysis of suspension elements of an articulated bogie for light railway vehicles is presented. The ride, stability and safety are used as dynamic performance index. Suspension elements of 10 and a conicity of wheel are used as design variables, To analyze sensitivity of design variables, the railway vehicle dynamics analysis program AGEM is used. The results shows that the secondary suspension elements have a strong effect on ride and the primary suspension elements have a moderate effect on ride. Conicity of wheel has a strong effect on the stability, The safety is not effected by all the design variables.

• Proceedings of the KSR Conference
• /
• 1999.11a
• /
• pp.558-565
• /
• 1999

Rubber wheel-type AGT has two major kinds of bogie; one is the bogie type and the other and passenger loads. This paper deals with the statics analysis for two types of bogie frame subjected to combined external forces, as well as independent ones specified in UIC 515-4. Furthermore, the dynamics analysis is performed under vibrational loading conditions so as to compare dynamic characteristics, Numerical results by using commercial packages, Ⅰ-DEAS and NASTRAN show that maximum stresses do not exceed the yielding level of material used for both bogies. From an overall viewpoint of strength, the bogie type turns out to be superior to the steering type except the case of a lateral loading. It is also observed that the steering type shows a be stiffened. It is strongly anticipated that vibrational fatigue analysis should be carried out under realistic loading conditions closely matching to situations such as running surface and lateral clearances along the guideway.

• Journal of Korean Society of Transportation
• /
• v.34 no.5
• /
• pp.465-475
• /
• 2016

Since inaccurate demand estimation for recent urban rail construction may result in financial burden to cities, precise prediction for operating cost as well as construction costs is necessary to avoid or reduce budget loss of the local or central government. The operating cost is directly related to the public fare and affect a policy to determine the rate system. Therefore, there is a pressing need to develop an estimating model for reliable operating cost of urban railway. This study introduces a new model to estimate the operating cost with new variables. It provides a better prediction in accuracy and reliability compared to the existing model, considering the feature of urban railway. For verification of our model, railway operation data from a few cities for the last five years were comprehensively examined to determine variables that affect the operating cost. The operating cost was estimated in a dummy regression model using five independent variables, which were average distance between stations, daily trains distance, total passenger capacity of a train in a train, driving mode(manned/unmanned), and investment type(financial/private).

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.20 no.4
• /
• pp.86-97
• /
• 2006

For the design of DC traction power supply system at new Light Rail Transit(LRT) construction, it is very important to determine system configuration, location and power capacity of substation. However, a LRT system consists of a number of subsystems such as train movement, power supply and traction drives, which inevitably contains many complexities and diversities. The objective of this paper is to clarify and systematize the design procedure and its assessment for the electrification system of a LRT line. This paper discusses in detail our approach to system design and its assessment. The whole DC-feeding network configuration, characteristics of a train, and design method of substation arrangements is thoroughly investigated for the design. As a result of the investigations, the design procedure is clarified and systematized and a computer program for the design and evaluation of the system is developed using the most suitable iterative method with nodal equation. To verify the proposed design and its assessment procedure, case studies for the DC traction power supply system of a planed Korean LRT line are performed.

• Journal of the Korean Society for Railway
• /
• v.15 no.4
• /
• pp.376-380
• /
• 2012

A study on the iron-loss reduction of 110kW-class Interior Permanent Magnet Synchronous Motor (IPMSM) for Light Railway Transit (LRT) is conducted. In general, the iron loss of IPMSM depends on the characteristics of core material and non-oriented electrical steel is used as a core material of IPMSM. In order to reduce the iron-loss of IPMSM, both non-oriented electrical steel and grain oriented electrical steel are applied as core material. Iron loss of 110kW-class IPMSM can be reduced approximately 40% comparing to an existing IPMSM by applying grain oriented electrical steel to the stator teeth.