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성호경(H.K. Sung),조정민(J.M. Jho),이종무(J.M. Lee),배덕권(D.K. Bae),김봉섭(B.S. Kim),김동성(D.S. Kim),신병천(B.C. Shin) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
Maglev using EMS becomes unstable by unexpected big air-gap disturbance. The main causes of the unexpected air-gap disturbance are step-wise rail joint and large distance between rail splices. For the stable operation of the Maglev, the conventional system uses the threshold method, which selects one gap sensor among two gap sensors installed on the magnet to read the gap between magnet and guide rail. But the threshold method with a wide bandwidth makes the discontinuous air-gap signal at the rail joints because of the offset in air gap sensors and/or the step-wise rail joins. Further more, in the case of the one with a narrow bend-width, it makes Maglev system unstable because of frequent alternation. In this paper, a new method using fuzzy rule to reduce air-gap disturbances proposed to improve the stability of Maglev system. It treats the air-gap signal from dual gap sensors effectively to make continuous signal without air gap disturbance. Simulation and experiment results proved that the proposed scheme was effective to reduce air-gap disturbance from dual gap sensors in rail joints.
성호경(H.K. Sung),이종무(J.M. Lee),조정민(J.M. Jho),이종민(J.M. Lee),유문환(M.W. Yu),조흥제(H.J. Jho),남용윤(Y.Y. Nam) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.4
Being controlled by a pole placement, levitation system should need many sensors that measure air-gap, velocity, acceleration, and so on. However, these sensors have observational errors by changed temperature. This paper proposed a output compensated command tracking controller for reducing the error and reducing sensors. Simulation results will be provided to show the validity of the proposed scheme.
Rail-Joint에서 퍼지룰을 기반으로하는 공극신호처리법
성호경(H.K. Sung),조정민(J.M. Jho),이종무(J.M. Lee),배덕권(D.K. Bae),김봉섭(B.S. Kim),신병천(B.C. Shin) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Maglev using EMS becomes unstable by unexpected big air-gap disturbance. The main causes of the unexpected air-gap disturbance are step-wise rail joint and large distance between rail splices. For the stable operation of the Maglev, the conventional system uses the threshold method, which selects one gap sensor among two gap sensors installed on the magnet to read the gap between magnet and guide rail. But the threshold method with a wide bandwidth makes the discontinuous air-gap signal at the rail joints because of the offset in air gap sensors and/or the step-wise rail joins. Further more, in the case of the one with a narrow bend-width, it makes Maglev system unstable because of frequent alternation. In this paper, a new method using fuzzy rule to reduce air-gap disturbances proposed to improve the stability of Maglev system. It treats the air-gap signal from dual gap sensors effectively to make continuous signal without air gap disturbance. Simulation and experiment results proved that the proposed scheme was effective to reduce air-gap disturbance from dual gap sensors in rail joints.
성호경(H.K. Sung),이종무(J.M. Lee),조정민(J.M. Jho),조흥제(H.J. Cho),김동성(D.S. Kim),남용윤(Y.Y. Nam) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Being controlled by a pole placement, levitation system should need many sensors such as measure air-gap, velocity, acceleration, and so on. However, these sensors have observational errors by changed temperature. This paper proposed a output compensated command tracking controller for reducing the error and reducing sensors. Simulation results will be provided to show the validity of the proposed scheme.