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针对大型旋转机械通过临界转速时振动过大的问题,搭建了转子系统实验台,实验台保持原本的支撑形式,并安装磁流变阻尼器,实验研究不同工况下磁流变阻尼器对转子系统振动的影响规律.结果表明:磁流变阻尼器可以有效抑制转子系统临界转速附近的振动,降幅可达90%.根据实验结果提出一种以振幅为反馈控制参数的随动控制方法,对转子系统的振幅变化进行追踪,根据振幅实时调节磁流变阻尼器电流,在线抑制振动.结果表明随动控制可以随着转子系统振动变化而在线改变控制电流,使转子系统振动稳定在目标值附近,实现了转子振动的自动调控.
Aiming at the problem of excessive vibration when the large rotating machinery passes the critical speed, a rotor system test bench is set up. The experimental support maintains the original form of support and a magnetorheological damper is installed. Experimental study on the effect of MR damper on rotor The results show that the MR damper can effectively suppress the vibration near the critical speed of the rotor system by 90%, and a kind of follow-up control method based on the amplitude feedback control parameters is proposed. The amplitude of the rotor system is tracked, and the current of the MR damper is adjusted in real time to suppress the vibration.The results show that the follow-up control can change the control current online with the vibration of the rotor system, and make the rotor system stable near the target value , To achieve automatic control of rotor vibration.