JSME International Journal Series B Fluids and Thermal Engineering
Online ISSN : 1347-5371
Print ISSN : 1340-8054
ISSN-L : 1340-8054
Study on Active Damper with a Magnetic Fluid
Hideaki FUKUDAKazuyuki UENOShinichi KAMIYAMATadamasa OYAMA
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1998 Volume 41 Issue 4 Pages 822-829


Study on control of vibration of a spring-mass system by using a magnetic fluid is conducted. The system consists of a cylinder filled with a magnetic fluid, a piston immersed in the magnetic fluid and a weight attached to the piston. The cylinder connected to the weight by a spring is excited to vibrate. The magnetic field necessary for stopping vibration of the mass is predicted. Validity of the prediction is proved by numerical experiments, where the equation of motion for the spring-mass system and the axisymmetric flow of the magnetic fluid are simultaneously solved. The magnetic field generated by a couple of coils can effectively damp the transient vibration and control the steady vibration to be extremely small.

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© The Japan Society of Mechanical Engineers
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