四自由度主动磁轴承-转子系统动力学仿真及试验研究

Simulation and test research on dynamics of a four-degree-of-freedom active magnetic bearing-rotor system

主动磁轴承作为航空多电发动机转子支承结构的首选方案,其转子系统动力学特性对多电发动机工作性能具有重大影响。以径向四自由度主动磁轴承-转子系统为研究对象,在分析径向四自由度主动磁轴承-转子运动微分方程的基础上,推导了系统状态方程。建立系统仿真模型,对转子轴颈运动轨迹进行计算。试验结果与计算结果对比表明,两者具有较为明显的一致性,但运动轨迹半径差距较大,仿真模型有待进一步优化。

As the perfect choice for the supporting of aviation more-electric turbine engine, the active mag-netic bearing rotor system’s dynamic characteristics have great impacts on the working performance of more-electric turbine engine. Taking a radial four-degree-of-freedom active magnetic bearing rotor system as the research object and based on the analysis of differential motion equations, the system state equations were inferred. A simulation model for the radial four-degree-of-freedom active magnetic bearing rotor sys-tem was established, and then the trajectory of rotor journal was calculated. Comparing the test results with the simulation results, there is great coherence between the two, but the gap of the trajectory radius is large, and the simulation model needs to be further optimized.