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 |
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Pages (from-to) | 299-311 |
Number of pages | 13 |
Journal | Journal of Sound and Vibration |
Volume | 208 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1997 Nov 27 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Acoustics and Ultrasonics
- Mechanical Engineering