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 language | English |
|---|---|
| Pages (from-to) | 299-311 |
| Number of pages | 13 |
| Journal | Journal of Sound and Vibration |
| Volume | 208 |
| Issue number | 2 |
| Publication status | Published - 1997 Nov 27 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Vibration control for a high-Tc superconducting non-linear levitation system
AU - Nagaya, K.
AU - Tsukagoshi, M.
AU - Kosugi, Y.
AU - Murakami, Masato
PY - 1997/11/27
Y1 - 1997/11/27
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=0000979547&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0000979547
VL - 208
SP - 299
EP - 311
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
SN - 0022-460X
IS - 2
ER -