• Proceedings of the KIEE Conference
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• 1995.07b
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• pp.726-728
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• 1995

A servo control algorithm robust under disturbance and reference change is developed using the self tuning control method based on the concept of the least distribution control. Also, the design algorithm incorporates the concepts of the well known internal model principle and the annihilator polynomial. In order to evaluate the effectiveness of the method, MAGLEV (Magnetic Levitation) system is used and the position control experiment for reference changes and disturbances of step type is done.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.28 no.11
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• pp.1733-1740
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• 2004

In the transverse flux linear induction motor(TFLIM) with the general secondary composed of conductor and back-yoke, there exists a magnetized force into the normal direction or the air-gap direction of the thrust motion as well as the thrust force. Therefore, the various methodologies have been tried to use the normal force by the two independent control variables of the multi-phase input. But, as the force depends inevitably and strongly on the thrust force, it is essential to decouple both forces for two control index. In this paper, we suggest a novel approach capable of compensating the couple between both forces and the control index by using the DC-biased multi-phase input, and then realizing the independent control of TFLIM.

• Proceedings of the KIPE Conference
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• 2013.11a
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• pp.177-178
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• 2013

To implement servo system using LIM, thrust and normal force control must be made in a moment. Thus, vector control is required to control magnetic flux and toque. In this paper, we applied to constant slip frequency vector control method by controlling d-q axis current and presented various simulation results.

• Proceedings of the KIEE Conference
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• 2002.11c
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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.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.1
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• pp.205-209
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• 2006

A linear motor based transfer vehicle is significantly focused as transportation systems in marine terminals for the future. We propose a control method for the systems to hence mass reduction and propulsion effects at a starting point by using a lift-force mechanism. This method is newly based on a combined levitation-and-propulsion power by a lift and thrust force of a permanent magnet linear synchronous motor (PMLSM), which is carried out by a decoupled control. We exam that our proposed control largely compensates the vehicle weight, reduces friction effect of the system, and increases its velocity. Consequently, this result contributes numerous productivity and economical efficiency for the port systems.

• Proceedings of the KIEE Conference
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• 2003.07b
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• pp.861-863
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• 2003

In this paper, a controller for a non-contact bearing-based motor-generator system is designed. The levitation control method is a digital PID control. The plant dynamics consisting of actuator and rigid rotor dynamics are described. And some experiments are conducted with each global control and local control concept. From the whirl test, the Motor-Generator System can be controlled within about ${\pm}10{\mu}m$ gap variation at the rotational speed of 600rpm and generate electric power of AC100V.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1996.04a
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• pp.95-99
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• 1996

In this paper, we proposed a method to measure the gap between the magnetic pole and the levitated object applying the inductance characteristic which vary according to gap. We made a driving circuit which supply the control input PWM(Pulse Width Modulation) signal and the carrier PWM signal to estimate the gap. Because the inductance is a function of gap, and the current of the carrier signal is a function of the inductance. We investigated the validity of the proposed method through the experimental results.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.456-457
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• 2008

이 논문은 크로스아암이 부상제어기에 미치는 영향을 분석한다. 레일에 일정한 간격으로 설치된 크로스아암은 부상제어기에 외란으로 작용한다. 부상제어기 제어대역 근처에 있는 외란으로 부상공극제어에 악영향을 미친다. 그 영향을 분석하여 제어기를 재설계하거나 크로스아암 간격을 조절하는 조치를 취해야 한다. 우선 부상제어 기를 제안하고 크로스아암외란을 입력으로 부상공극 출력 전달함수를 구해서 보드선도를 그려 그 영향을 분석한다.

• 제어로봇시스템학회:학술대회논문집
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• 1994.10a
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• pp.396-399
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• 1994

In a large class of industrial robot manipulators, its end effector for supporting the moving object have designed with mechanical suspension method(gripper). In this paper, We describe a high performance magnetically levitated end effector of robot, where is no mechanical contact and friction.

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.95.4-95
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• 2002

1. Introduction 2. Distance measurement using array 3. Linearization of CdS array characteristics 3.1. Crisp linearization of CdS array characteristics 3.2. Fuzzy logic linearization of CdS array characteristics 4. Magnetic Levitation System 4.1. Design of MLS 4.2. Implementation of MLS 4.3. Results of MLS 5. Conclusion