Vibration control for a high-Tc superconducting non-linear levitation system

K. Nagaya, M. Tsukagoshi, Y. Kosugi, Masato Murakami

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In the present paper the modelling and control of a high-Tc superconducting levitation system are discussed. First, the analytical expressions for obtaining the non-linear levitation force, given by the present author, are clarified; and then a vibration control method is presented in which feedback currents involving frequency weights are used. In the method, the square of the displacement in the frequency domain is taken as a cost function. Optimal coefficients of the transfer function of the controller are obtained by minimizing the cost function. Hence, the spillover instability due to the non-linear vibrations will be reduced. Numerical calculations have been carried out for some typical problems. To validate the present method, experimental tests have also been carried out.

Original languageEnglish
Pages (from-to)299-311
Number of pages13
JournalJournal of Sound and Vibration
Volume208
Issue number2
Publication statusPublished - 1997 Nov 27
Externally publishedYes

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levitation
Vibration control
Cost functions
costs
vibration
transfer functions
Transfer functions
controllers
Feedback
Controllers
coefficients

ASJC Scopus subject areas

  • Engineering(all)
  • Mechanical Engineering

Cite this

Vibration control for a high-Tc superconducting non-linear levitation system. / Nagaya, K.; Tsukagoshi, M.; Kosugi, Y.; Murakami, Masato.

In: Journal of Sound and Vibration, Vol. 208, No. 2, 27.11.1997, p. 299-311.

Research output: Contribution to journalArticle

Nagaya, K. ; Tsukagoshi, M. ; Kosugi, Y. ; Murakami, Masato. / Vibration control for a high-Tc superconducting non-linear levitation system. In: Journal of Sound and Vibration. 1997 ; Vol. 208, No. 2. pp. 299-311.
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