Optics and Precision Engineering, Volume. 20, Issue 3, 563(2012)

Vibration suppression of magnetic bearing based on sliding mode disturbance observer

HAN Bang-cheng*... CUI Hua and TANG En-qiong |Show fewer author(s)
Author Affiliations
  • [in Chinese]
  • show less

    As rotor imbalance can lead to the synchronous disturbances of Magnetically Suspended Control Moment Gyroscopes (MSCMG), and can reduce the attitude control accuracy and the load accuracy of spacecrafts, A general control strategy based on a sliding mode disturbance observer was proposed to minimize the synchronous vibration caused by unbalance on a rotor. First, a dynamics model of the magnetic bearing-rotor system was set up and the sliding mode observer used for disturbance observation was designed. Then, a Tracking Differentiator (TD) was used to estimate the differential signals from a displacement sensor to obtain the velocity signals and to reduce orders of the observer. Finally, according to the synchronous force estimated by the disturbance observer, a controller was designed to compensate the vibration caused by unbalance of the rotor. Simulation and experimental results demonstrate the effectiveness of the proposed approach and the vibration has been decreased by 72%.

    Tools

    Get Citation

    Copy Citation Text

    HAN Bang-cheng, CUI Hua, TANG En-qiong. Vibration suppression of magnetic bearing based on sliding mode disturbance observer[J]. Optics and Precision Engineering, 2012, 20(3): 563

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Aug. 3, 2011

    Accepted: --

    Published Online: Apr. 16, 2012

    The Author Email: Bang-cheng HAN (hanbangcheng@buaa.edu.cn)

    DOI:10.3788/ope.20122003.0563

    Topics