• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 특별세미나 특별세션
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• pp.199-207
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• 2006

Because of many advantages of Maglev(magnetic levitation) trains, the study of Maglev technology has been accelerated rapidly throughout the world. As a results of that, German commercialized the super-speed magnetic train in Shanghai at the world-wide beginning. Japan started the first commercial service for the low speed Maglev train system in Nagoya in the world. For the commercial service of Maglev trains, signal system must be installed on the operation line and be controlled by operation control center In this paper, Maglev train operation systems of the inside and outside of the country are investigated and what is supplied for domestic Maglev train system is investigated.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.590-596
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• 2010

Maglev vehicles levitated and propelled by electromagnet as non-contact between vehicle and guide rail is environmentally friendly transport system which have many advantages like ride comfort and guide way construction costs. As a goal of commercial operation at Incheon International Airport in 2012, development of vehicle is underway and proto-vehicle is test running at KIMM. The maglev bogie system of proto-vehicle, like railway vehicle, has functions to support weight of vehicle, transfer force of brake and propulsion and improve ride comfort through insulation of vibration and improve curve negotiation capability. The main components of a bogie are two modules consisted of electromagnetic, frame and linear motor, two tie beams to connect two modules and steering system to improve curve negotiation capability. The purpose of this paper is to describe general specification, structure, manufacturing process, performance testing, ride comfort of proto-vehicle and bogie system.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1505-1510
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• 2007

When developers conduct a systems engineering approach the first problems that they will be faced are how to define and analyze the operational concept. In case of practical use project of MAGLEV train, those problems are also important since end products of practical use project must be assured for commercial service level. Lack of domestic developer's experience on systems engineering activity can cause a confusion a progress of the project. This study will propose a guide to establish an operational concept of project to develop or construct urban transit system.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.265-271
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• 2007

To develop the most effect maintenance system of urban MAGLEV train which is being developed based on system engineering, logistics belong to special system engineering were applied to maintenance system and Integrated Logistic Supports (ILS) were employed to tailor every step of MAGLEV project. Since ILS had not been applied to domestic train project, the followings were studied to validate ILS: 1) case studies on maintenance procedures at home and abroad, 2) overview of standardized process of ILS, 3) Comparison and analysis of relationship between RAMS and ILS, 4) Application of ILS to MAGLEV maintenance system and other domestic train system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.256-258
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• 2004

It is not easy to apply new algorithm to the vehicle under driving test because the principle and moving characteristic of Magnetically Levitated Train(Maglev) developed in KIMM have been not easily analyzed yet. So, in this paper the small-scaled Maglev which can experiment economically and analyze moving-characteristic is proposed. Proposed small-scaled Maglev have the same principle and function as that of Maglev but it is smaller than real system at the ration of 1 to 7.

• 전기학회논문지
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• 제64권7호
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• pp.1096-1103
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• 2015

Electromagnetic levitation system(EMLS) is one of the well known nonlinear systems due to its high degree of nonlinearities. Moreover, when there are uncertain parameters in EMLS, it is not easy to have an accurate control of EMLS. In this paper, we first apply a standard input-output feedback linearzing controller to EMLS and investigate the possible control error caused by uncertain coil resistor. Then, as a remedy, we design and apply a robust controller using Lyapunov redesign technique to deal with this uncertain coil resistor in the system. The validity of our robust controller is verified via system analysis and experimental results.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제55권12호
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• pp.653-660
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• 2006

In this paper, dynamic simulation results for modules of a magnetically-levitated(Maglev) vehicle are presented. The mathematical dynamic models for the Maglev vehicle are firstly derived. The Maglev system consists of one vehicle, two half-bogies, one guideway, four secondary suspensions, eight electromagnets and levitation control systems. Also, the dynamic characteristics are analysed by using the derived models. Finally, two simulations such as reference airgap step change of 1mm and rail step change of 1mm, are carried out. The dynamic simulation results are shown to testify the developed dynamic simulation program. From the results, we can see the possibility of the dynamic simulation program to develop a new Maglev vehicle system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 A
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• pp.70-72
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• 1999

Actuator (chopper) and sensors failures resulting from electric shock and mechanical vibration generating by rail irregularities are the serious problem deteriorating the performance in the electromagnetic suspension systems. Thus, this paper proposes the reliable output feedback controller for the electromagnetic levitation systems against actuator, air-gap sensor and acceleration sensor failures. The designed controller is an extend version of a novel design technique which has the design method of the output feedback controller using dynamic compensator. The benefits of this scheme are demonstrated through the experimental results for the proposed controller against chopper, air-gap sensor and acceleration sensor failures of electromagnetic levitation system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 합동 추계학술대회 논문집 정보 및 제어부문
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• pp.374-377
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• 2002

In this paper, the control system of the MagLev system for a CPS is designed and implemented. The target to be controlled is PEM(permanent and electromagnet) type with 4-comers levitation which is open-loop unstable, highly non-linear and time-varing system. The designed controller is validated by some kinds of experiments.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 A
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• pp.199-201
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• 1994

In this paper, The characteristics of the new superconducting maglev system which has quadruple armature windings is examined. This system can generate guidance force and levitation force as well as propulsion force by single ground coil. The time-domain analysis method and phasor analysis method are derived to analyze the characteristics of the proposed system. From the numerical examples for two kind of armature winding configurations, it is shown that the levitation force and guidance force can be generated by single armature winding of the linear synchronous motor without any other ground coils for levitation and guidance, and that double layer configuration has better characteristics in the qualitive characteristics. like as efficiency, pulsation of the electromagnetic forces and drag ratio, than the single layer configuration.