Study on ball screw-type electro-magnetic absorber.

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  • ボールねじ式電磁アブソーバの研究

Abstract

The damping force characteristics of a semiactive electro-magnetic absober which is composed of a ball screw, an aluminium disk and electro-magnets are discussed experimentally.The effects of vibration isolation of this absorber to a simply supported beam are also discussed experimentally and compared to the results of digital simulation. The results may be summarized as follows : (1) The damping force of the absorber is nearly proportional to relative velocity. (2) The viscous damping coefficient increases as the voltage of the electro-magnets increases, and is nearly linear for the voltage in some voltage range. (3) The viscous damping coefficient depends on the physical properties of the electro-magnets and the conductor disk as well as the lead of the ball screw.

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