可控阻尼磁流体轴承的振动控制性能研究

Study on vibration control performance of controlled damped magnetic fluid bearing

设计了一种新型铁磁流体轴承,利用有限元分析软件ANSYS对其内部磁场进行了模拟。以漏磁系数为优化对象,对铁磁流体轴承的参数进行了优化设计。同时介绍了铁磁流体轴承测试平台的工作原理,包括了伺服电机控制器、电涡流位移传感器、采集卡和电源等。最后,对磁流体轴承的动态稳定性进行了控制实验。实验结果表明,对于试验用结构尺寸和流体成分的磁流体轴承,当外加电流小于或等于0.08 A时,铁磁流体轴承支承的转子振幅随外加电流的增加而减小。此外,转子的动态稳定性也与转速有关。当外加电流为0.08 A时,磁流体轴承转子的振幅随转速的增加先增大后减小。实验表明,磁流体轴承能够抑制转子的振动,并且具有较高的精度。

In this paper,a new type of ferromagnetic fluid bearing is designed and its internal magnetic field is simulated ANSYS finite element analysis software.In this paper,the parameters of ferromagnetic fluid bearing are optimized by using magnetic leakage coefficient as the optimization object.At the same time,the working principle of the test platform of ferromagnetic fluid bearing is introduced,including servo motor controller,eddy current displacement sensor,acquisition card and power supply.Finally,the dynamic stability of magnetic fluid bearing is controlled dynamically.The experimental results show that when the applied current is less than or equal to 0.08 A,the amplitude of the rotor supported by the ferrofluid bearing decreases with the increase of the applied current.In addition,the dynamic stability of the rotor is also related to the rotational speed.If the applied current is 0.08 A,the amplitude of the rotor of the magnetic fluid bearing increases first and then decreases with the increase of the rotational speed.Experimental results show that the magnetic fluid bearing can suppress the vibration of rotor and has high precision.