厳密な線形化による磁気軸受の広域安定化  [in Japanese] Wide Area Stabilization of a Magnetic Bearing using Exact Linearization  [in Japanese]

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Author(s)

Abstract

An active magnetic bearing (AMB) is a bearing to suspend a rotor by magnetic forces without any contact. Feedback control is indispensable for a magnetic bearing, because it is essentially an unstable system. To design a feedback control system, a linear mathematical model of the plant is convenient, however the force of electromagnet is highly nonlinear. Then usually a linear approximation around the operating point is employed, but the obtained linearized model can not express the exact behavior of the system at any other operating points. In this paper, we discuss the wide area stabilization of magnetic bearing using exact linearization approach.<br>At first, we derive a nonlinear mathematical model for a magnetic bearing, then we show this nonlinear system is belong to a class of exactly linearizable nonlinear systems. Next, by using exact linearization method, we transfer the nonlinear model of a magnetic bearing to a linear time invariant state model in spite of change of the operating point and the rotational speed of the rotor. Then we construct the state feedback control system by conventional LQ method. Finally, we evaluate the validity of our proposed method by experiment.

Journal

  • IEEJ Transactions on Industry Applications

    IEEJ Transactions on Industry Applications 118(3), 410-416, 1998-03

    The Institute of Electrical Engineers of Japan

References:  13

Codes

  • NII Article ID (NAID)
    10002726591
  • NII NACSIS-CAT ID (NCID)
    AN10012320
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    09136339
  • NDL Article ID
    4413274
  • NDL Source Classification
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL Call No.
    Z16-1608
  • Data Source
    CJP  NDL  J-STAGE 
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