• Proceedings of the KSR Conference
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• 2006.11a
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• pp.113-122
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• 2006

To investigate the adequacy of maglev train system to future urban transport environments, first we derived minimum necessity requirements of the new-transit system by analyzing the issues in the urban transit management and new needs of transportation customers. Then the conformity of Maglev train to the requirements was examined. With respect to this adequacy analysis, policy directions and agenda of the making practical use of urban transit Maglev system' is proposed.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1051-1052
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• 2007

In this paper, as a clean lift, a maglev(magnetic levitation) clean lift is designed and described. The maglev clean lift, which is superior to conventional lifts in vibration, noise, clean class and speed characteristics, consists of magnets, guide rails, guide rollers, magnet module frame, cage, guidance controller, sensors, etc. As design specifications, the maximum value of vibration is 0.2G, the maximum value of noise is 60dB, and the clean class is #10. The design results for the maglev clean lift are shown and discussed.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.29 no.2
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• pp.193-199
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• 2016

Since the variations of electromagnetic suspension forces of maglev trains have close relations with the acceleration of the levitated bodies, it is basic to control the levitation forces using the measured acceleration of vehicles. In this study, an airgap control algorithm based on acceleration feedback is applied to maglev trains and a dynamic analysis method is developed considering maglev train-guideway interaction. Using the developed method, dynamic behaviors of a maglev train-guideway interaction system are investigated. It is observed from the analysis that the current design guidelines can be satisfied when the proposed airgap control algorithm is employed. Using the contorl algorithm, the current guidelines can be improved and economical maglev railway guideway structures can be designed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2631-2638
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• 2013

In this study, to understand the technology development trend of super-speed maglev, the patents applied by major countries are analyzed. And based on the analyzed results, the domestic technology development direction are suggested. For patent analysis, the major technologies for super-speed maglev are classified into 14 parts. Then, through the quantitative analysis method such as number, increase rate and share rate, the overview of technology development and focused parts by each country are investigated. Also through the qualitative analysis method such as concentration degree, citation index and market share index, the technology level and market securing ability of each country are anticipated. Considering the analyzed results and technology development trend, the domestic technology development direction such as priority development fields and methods are proposed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.4739-4746
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• 2013

In position detection for super speed maglev propulsion control, the influence of position signal delay and transmit cycle on propulsion power degradation is investigated analytically and validated by test bed experiments. As a solution to the problem caused by signal transmit, position signal compensation and estimation method is proposed and applied to the test bed. Through experiments, it is confirmed that by adapting the proposed method, the propulsion power is increased remarkably, which results in acceleration and velocity performance improvement. This method could be effectively applied to position detection system of Korean super speed maglev which is under development.

• Journal of the Korean Society for Railway
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• v.17 no.4
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• pp.233-244
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• 2014

In this study, an analysis method for maglev train-guideway interaction is verified using field measurement data. The cabin and bogies of the maglev train are modeled as rigid bodies that are allowed to have heave and pitch motions. Levitation forces from the electromagnetic suspensions on the bogies are controlled using an active control algorithm. The guideway is represented using the Euler-Bernoulli beam. Considering rigorously the changes in air-gaps and material points at which the levitation forces are applied due to the pitch motions of the bogies, dynamic analysis of maglev train-guideway interaction is performed. Using field measurement data, obtained from the Incheon Airport Maglev Railway, the analysis method is verified. Accuracy of the analysis method is investigated. It is determined that the structures in the railway are designed and constructed safely according to the design code for maglev railways.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.942-944
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• 1993

This paper treats of the recent trends in the development, of the Magnetically levitated vehicle(Maglev) and the propulsion system of the Maglev in the world. Consequently, the material data for the guide post in the research and formulation of development policy are prevented.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2008.04a
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• pp.555-560
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• 2008

Dynamic interaction analysis between actively controlled Maglev and bridge is carried out. For this, dynamic governing equation for 2-dof Maglev vehicle and optimal feedback control scheme of DOFC are developed. And then the dynamic effect of the 1st natural frequency of bridge, vehicle/bridge mass ratio and damping coefficient of bridge to the both of air-gap variations of UTM-01 maglev vehicle and bridge center maximum displacement response are investigated. From the results of numerical simulation, it is found that the 1st natural frequency of bridge, vehicle/bridge mass ratio and damping coefficient of bridge does not affect greatly within design velocity of the vehicle.

• Journal of the Korean Society of Systems Engineering
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• v.5 no.1
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• pp.21-32
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• 2009

The systems engineering (SE) process shall be applied to the project for successful development of ultra-high-speed (UHS) Maglev train system which is one of very large and complex systems. It is important to abolish technology differentials from the advanced developers such as Germany, Japan, etc. and to ensure discriminatory competitiveness of the application of systems engineering process for the development of the system based on appropriate concepts and requirements. General operation concept and stakeholder's requirements of UHS Maglev train system must be elicited with system concept for initiating the project. The management plan should be devised for all sorts of systems engineering activities of risk management, performance management, lifecycle cost management, etc. This paper would support to establish the systems engineering management plan (SEMP) for the program of UHS Maglev train system development with associated documents.

• 기계와재료
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• v.11 no.2 s.40
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• pp.111-118
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• 1999

Test Results and Status of development of the urban transit maglev system(UTM-O1) are reported. Maglev Project Team in KIMM, in cooperation with Hyundai Precision Company and the Korea Electrotechnology Research Institute(KERI), has successfully finished the second stage development project (1995. 5-1998. 8) and demonstrated a prototype two vehicle consisted urban maglev train operating in the speed range of 50km/h. In this paper, we report various test results of the UTM-01 system, present status of quo and future prospect, and what have been done so far to improve the performance of the maglev system overall.