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VIBRATION CONTROL FOR A HIGH-Tc SUPERCONDUCTING NON-LINEAR LEVITATION SYSTEM

โœ Scribed by K. Nagaya; M. Tsukagoshi; Y. Kosugi; M. Murakami

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
199 KB
Volume
208
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

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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