Controlling the Magnetorheological Effect Using Vibrations
E. Leroy, P.-H. Orefice, L. Eck, M. Hafez
CEA LIST, Gif-Sur-Yvette, France
Magnetorheological fluids (MRF) are interesting for building devices that require high strength without a need for active actuation such as dampers, brakes or clutches. Usually, the use of MRF requires an electromagnetic coil that makes them difficult to apply to compact, miniature devices. In this work, we present a new technology to operate magnetorheological fluids, it is based on the use of mechanical vibrations. Experiments conducted on a cylindrical brake showed that the braking torque can be reduced when vibrations are applied to the shearing element. The effect depends on multiple parameters such as the frequency and the amplitude of the vibration and a drop of the total torque up to 40 % has been observed in a constant magnetic field. The combination of vibrations and permanent magnets could be interesting for building miniature MRF-based device. These could be used in various applications such as haptic interfaces, reconfigurable articulations, etc.
ACTUATOR 2016 Manuscript C4.1
Publication date: 01/06/2016
Manuscript C4.1 published in Conference Proceedings ACTUATOR 2016
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