Abstract
Magnetic suspended vibration isolator was designed and applied to multi-degree of freedom vibration isolation system. Stiffness and damping of magnetic suspended vibration isolator based on stiffness control was deduced. The operating condition of magnetic suspended vibration system was analyzed and mathematic model was constructed. The mathematic model of base motion was incorporated into the theoretical model and simulation model of the magnetic suspended vibration isolator. The stiffness and damping of the whole vibration-isolating system are varied by the way of adjusting the stiffness and damping of the magnetic suspension isolator. Force transmissibility, input force, and output force response of magnetic suspended vibration isolation system, respectively under chirp exciting signal and dual-frequency exciting signal were simulated. The simulation results indicate that the floating raft isolation system under active fuzzy controller can remarkably suppress vibration in the wide range of frequency and is remarkably better than those of passive isolation.
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