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Volume 40 Issue 8
Aug.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(8): 1011-1016.
Li Lin, Liu Xue. Enhancement of electromechanical coupling for piezoelectric system and suppression of multimode vibration[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(8): 1011-1016. doi: 10.13700/j.bh.1001-5965.2013.0502(in Chinese)
Citation: Li Lin, Liu Xue. Enhancement of electromechanical coupling for piezoelectric system and suppression of multimode vibration[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(8): 1011-1016. doi: 10.13700/j.bh.1001-5965.2013.0502(in Chinese)
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Enhancement of electromechanical coupling for piezoelectric system and suppression of multimode vibration

doi: 10.13700/j.bh.1001-5965.2013.0502

  • School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 28 Aug 2013
  • Publish Date: 20 Aug 2014
    Abstract
  • Enhancing the electromechanical coupling of a piezoelectric system is an effective way to suppress the vibration of the system by the piezoelectric shunt technique. A method was proposed which can increase the multiple-mode electromechanical coupling for a piezoelectric system. From the research of piezoelectric cantilever beam model, it was found that the electromechanical coupling depends on the position of the electrode on the piezoelectric materials, as well as the way to connect to the shunted circuits. The modal electromechanical coupling function was proposed to describe this phenomenon. For the sake to get one modal coupling maximum, the best position of the electrode and the best connection ways can be obtained through optimizing the modal electromechanical coupling function. The ‘current flowing’ circuits was proposed to make multiple-mode electromechanical coupling enhancement possible and to realize multimode vibration suppression. This method was verified through numerical examples.

     

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