LIU Xiaomei, LI Hongyou, HUANG Yijian

 

(College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China)

 

 

Abstract: In order to describe the velocitydamping force delay more accurately, an improvement based on traditional Bingham model of MR damper was proposed using the fractional derivation in place of integral derivation. The fractional derivative Bingham model could exactly describe both the shearing flow after MR fluid yielding and the elastic deformation at low shear rate before yielding with less parameter and clear physical meaning. Experiments were carried out to compare the fitting precision on damping forcedisplacement and damping forcevelocity between integral and fractional derivative Bingham model. The relationship between derivative order, control current and lagging of damping forcevelocity was also discussed. Experiment results indicate that the precision of MR Damper fractional derivative Bingham model is improved obviously on fitting relationship of displacementforce and velocityforce.

 

Key words: MR fluid; damper; Bingham model; fractional derivation