该文应用磁流变(MR)阻尼器对斜拉索振动进行控制,建立了MR阻尼器——斜拉索控制系统的运动方程,利用Galerkin方法得到时滞动力系统,通过模态分析和线性稳定性分析,得到了时滞作用下的控制系统稳定性条件。研究表明,时滞的存在,影响了斜拉索振动控制系统的效果及结构的稳定性;对于某一确定的控制增益,MR阻尼器——斜拉索系统的控制效果随着时滞的增大而变差。 In this paper, the MR damper is used to control the vibration of the stay cable. The equations of motion of the MR damper-stay cable control system are established. The time-delay dynamical system is obtained by the Galerkin method. The modal analysis and linearity Stability analysis, get the stability of the control system under the condition of delay. The results show that the existence of time-delay affects the effect of the cable vibration control system and the stability of the structure. For a given control gain, the control effect of the MR damper-stayed cable system increases with time delay Big and bad.