Abstract
This paper deals with an application study of Magneto-Rheological(MR) fluid to a small size variable-damping mount for precision equipment of automobiles. MR fluid is known as a class of functional fluids with controllable yield stress of fluid by the applied magnetic field strength. A typical MR fluid is a suspension where pure iron particles of 1-20μm in diameter are dispersed in a liquid such as mineral oil or silicone oil, at the concentration of 20 40 vol%. A variable-damping mount filled with MR fluid was combined with a magnetic coil at the bottom, and its performance was investigated. Furthermore, a new strategy of control system for MR actuators was proposed, in which the cluster of particles in MR fluid under some magnetic field should be broken by the vibration energy so that the time constant might be shorter in the reaction process of MR fluid to the applied magnetic field. The control system was verified by the experimental investigations.
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