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Controller design with high fidelity model for a passive maglev tray system

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Abstract

Usually, in controller design for maglev systems, only the dynamics of the magnet and the levitating object are modeled. However, reference frames, such as rails for maglev trains or magnet frames for a maglev tray system, are assumed as rigid bodies even though they have compliances. This is because the modeling of reference frames based on their design is not simple as the modeling of magnets or levitating objects. Therefore, the compliances of the reference frames are implicitly considered during the controller tuning process. Undoubtedly, controllers designed with better fidelity of system model will show better performance. This study presents an experimental way of achieving a model of a reference frame through impact tests and discusses the benefits of having a higher fidelity model in control design. The exemplary system is a passive maglev tray. Least Quadratic Regulator (LQR) control design is used to show the benefits of having a higher fidelity model. To verify the controllers in several conditions, the passive maglev tray system is designed and manufactured. Through several tests with several conditions, we will provide some suggestions for controller design of maglev systems.

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Authors and Affiliations

  1. Department of System Dynamics Vibration & Shock Research Team, Korea Institute of Machinery and Materials, Daejeon, 305-343, South Korea

    Jin-Woo Park

  2. Department of Magnetic Levitation and Linear Drive, Korea Institute of Machinery and Materials, Daejeon, 305-343, South Korea

    Chang-Hyun Kim & Doh Young Park

  3. School of Mechanical Engineering, Pusan National University, Busan, 609-735, South Korea

    Changsun Ahn

Authors
  1. Jin-Woo Park
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  2. Chang-Hyun Kim
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  3. Doh Young Park
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  4. Changsun Ahn
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Correspondence to Changsun Ahn.

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Park, JW., Kim, CH., Park, D.Y. et al. Controller design with high fidelity model for a passive maglev tray system. Int. J. Precis. Eng. Manuf. 15, 1521–1528 (2014). https://doi.org/10.1007/s12541-014-0500-0

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  • DOI: https://doi.org/10.1007/s12541-014-0500-0

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