电磁动力吸振器式转子在线监测方法研究

Research on the Online Monitoring Technique of Magnetic Dynamic Absorber Type

电磁动力吸振器具有重大的工程应用价值。在给出转子+电磁动力吸振器系统模型的基础上,采用输出调节器理论,设计了电磁动力吸振器控制系统,实现了控制系统的主要目标:在指定的多个频率位置,将转子的不平衡响应减为零,而在其余较宽的频率范围内,抑制了不平衡响应的水平,使之处于非共振量级。因此,用电磁动力吸振器可实现对转子振动的在线控制。在此基础上,因为在电磁动力吸振器控制系统的设计中,构造了反映不平衡力的状态量及其观测器,所以还可以利用状态观测器获得转子的不平衡信息,实现不平衡量的识别,从而给出了用电磁动力吸振器进行不平衡识别的方法。该方法的提出,有益于在线监测转子的不平衡状态、及时诊断故障以及无试转的平衡。

The magnetic dynamic absorber is of great value for practical use in engineering. The control system of a magnetic dynamic absorber has been designed using the theory of output regulator. The main aim of the control system to reduce the unbalance response of the rotor equipped with the absorber to zero at several specified frequencies and to a non- resonant level at other frequencies has be achieved. Therefore, the on - line control of rotor vibration can be realized by using magnetic dynamic absorber. Moreover, even the state observer can be utilized to obtain the rotor unbalance information and realize the identification of unbalance vector because the slate vector representing the centrifugal force and corresponding observer are constructed in designing the control system of magnetic dynamic absorber. Thus a method to identify rotor unbalance by magnetic dynamic absorber is presented. The method presented here is of value to the on - line rotor unbalance condition monitoring, the timely fault diagnosis as well as the rotor balancing without test runs.