磁流变差动阻尼器的设计与有限元分析

针对旋转式磁流变液阻尼的磁滞性问题以及由于磁滞性而造成的旋转式磁流变液阻尼器输出力矩不稳定的问题,设计了一种差动式阻尼器,不仅可以使输出的力矩可控性更好,而且有效地克服了磁滞现象的影响.在通过理论计算得到磁流变液差动阻尼器输出力矩模型的基础上,利用ANSYS有限元分析软件对磁流变液差动阻尼器进行了磁场分析,得到了磁流变液的磁感强度与磁流变液差动阻尼器线圈中的控制电流之间的关系,结合数值分析软件得到了磁流变液差动阻尼器的输出力矩与线圈中的控制电流之间的关系.研究结果表明,通过控制磁流变液差动阻尼器的控制电流可以实时调整差动阻尼器的输出力矩大小及方向,对磁流变液阻尼器作为精确控制的力矩控制元件奠定了理论基础.

Design and finite element analysis of magneto-rheological differential damper

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.