Design and finite element analysis of magneto-rheological differential damper

XV Xing-wen1， ZHENG Di1，2*， HU Li-yong1，2， ZHAN Jian-ming1
(1.School of Mechanical Engineering and Mechanics， Ningbo University， Ningbo 315211， China；
2. Ningbo Institute of Technology， Zhejiang University， Ningbo 315100， China)

Abstract： Aiming at the hysteresis of the rotational magneto-rheological damper (MRD) and the instability of the output torque caused by the hysteresis， the magneto-rheological differential damper (MRDD) was designed. The output torque was controlled easily and the hysteresis was eliminated. The output torque model for the MRDD was established. The magnetic field inside the MRDD was analyzed by using ANSYS software and the relationship between the input current and the magnetic flux density was received. At last， the correlation between the input current and the output torque was obtained. The results indicate that the output torque can be controlled by the input current without causing hysteresis， and it lays the good foundation for the application of the MRDD.
Key words： magneto-rheological differential damper（MRDD）； finite elements； magnetic field analysis