Abstract
This paper proposes a method for controlling vibrations of a magnetic levitation table. The system considered in this paper is made of permanent magnets with an electromagnet. The vibration is controlled by changing the magnetic flux density of a permanent magnet by controlling an electrical current in a coil of an electromagnet. Two kinds of control techniques are combined. One is the disturbance cancellation control in which the variation of the levitation force is controlled which corresponds to the external force due to disturbances, and the other is the velocity feedback control. Experimental tests have been carried out for discussing the validity of this technique. The experimental results show that the technique proposed in this paper is available to isolate vibrations, and the transmissibility can be controlled to be nearly zero.
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