摘要
磁悬浮轴承支承特性对转子轴承系统临界转速、不平衡响应、稳定性具有重要影响。研究一种基于不平衡响应辨识磁悬浮轴承刚度和阻尼的方法。用MSC.Patran建立磁悬浮轴承转子有限元模型;用Matlab软件实现基于不平衡响应辨识磁悬浮轴承刚度阻尼的基本原理;用有限元模型进行仿真辨识验证该方法的可行性;对五自由度磁悬浮轴承试验台进行基于不平衡响应的磁悬浮轴承刚度阻尼辨识试验研究。为检验辨识结果的正确性,赋予转子有限元模型试验辨识的磁悬浮轴承刚度与阻尼,进行仿真与试验系统不平衡响应对比,结果两者基本一致,表明该方法可有效地辨识磁悬浮轴承的刚度与阻尼。
The stiffness and damping of active magnetic bearings （AMBs） have a great influence on dynamic characteristics of a rotor bearing system, such as, critical speed, unbalance response and system stability. One identification method for stiffness and damping of AMBs based on rotor unbalance response was studied. Firstly, a rotor- bearing system finite element model was built with MSC. Patran. The program was compiled with Matlab software based on the identification method of imbalance responses. Then, the simulation of the identification method was done with the finite model to make sure the feasibility of the method. Moreover, a test for the identification of the stiffness and damping of AMBs was conducted. Last, in order to verify the reliability of the method, the coefficients identified with the test were given to the finite element model of the rotor-bearing system, and the imbalance responses obtained with simulation and test were compared to verify the accuracy of the identification method. Both of them agreed well. It was shown that the proposed method is effective to identify the stiffness and damping of AMBs.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第3期29-34,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51075200)
江苏省自然科学基金(BK2011070)
南京航空航天大学基本科研业务费(NZ2012203)
关键词
磁悬浮轴承
不平衡响应
刚度
阻尼
有限元
active magnetic bearing
imbalance response
stiffness
damping
finite element
