设计了一种转子振动控制用的剪切式磁流变液阻尼器 ,建立了磁流变液阻尼器 -悬臂转子系统的分析模型 ,理论和实验研究了转子系统的不平衡响应特性。研究表明 ,随着施加磁场强度的增加 ,磁流变液阻尼器的阻尼和刚度增大 ,转子系统的临界振幅明显下降 ,系统的临界转速也明显提高。通过简单的开关控制 ,可抑止转子通过临界转速过程中的振动 A shear MRF damper for rotor vibration control is designed and an analytical model of MR damper - cantilever rotor system is established. The unbalance response of the rotor system is theoretically and experimentally studied. The results show that with the increase of applied magnetic field, the damping and stiffness of MR damper increase, the critical amplitude of rotor system decreases significantly, and the critical speed of the system also increases obviously. Through the simple switch control, can inhibit the rotor through the critical speed during the vibration