Lateral vibration suppression by varying stiffness control in a vertically active magnetic suspension system

Asief Javed, Takeshi Mizuno, Masaya Takasaki, Yuji Ishino, Masayuki Hara, Daisuke Yamaguchi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Reduction of vibration in passively supported lateral directions by varying stiffness control is discussed in a vertically active magnetic suspension system. In the target system, one pair of electromagnets is arranged in differential driving mode to actively control the vertical motion of the floator. Usually the floator is prone to vibrate in the lateral direction because it is passively supported by virtue of the edge effect of the electromagnets. In this work, such vibrations are reduced by incrementing or decrementing the currents simultaneously during vibration without changing the vertical position of the floator. This control strategy is implemented in a developed apparatus where an iron ball is suspended by differentially operated electromagnets without any mechanical contact. Experiments are carried out, and the results show the reduction of lateral vibrations without changing the vertical position of the floator.

Original languageEnglish
Article number21
JournalActuators
Volume7
Issue number2
DOIs
Publication statusPublished - Jun 1 2018
Externally publishedYes

Keywords

  • Differential driving mode
  • Lateral vibration
  • Varying stiffness
  • Vertically active magnetic suspension

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Control and Optimization

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