电磁轴承支承挠性转子过临界控制器设计  

Controller design for a flexible rotor supported by active magnetic bearing passing the critical rotational speed

作　　者：谷会东[1] 赵雷[2] 石磊[2] 刁兴中[2] 赵鸿宾[1] 

机构地区：[1]清华大学工程物理系,北京100084 [2]清华大学核能与新能源技术研究院,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第6期821-823,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2001AA511010)

摘　　要：以10MW高温气冷堆中氦气透平试验转子模型为对象,设计了一种控制器。该控制器采用模态截断的方法获得电磁轴承系统的数学模型,并采用线性二次型Gauss方法,采用了一个同LQG(linearquadraticGaussian)控制器相串联的相位补偿器,以便有效地阻尼转子的模态振动。经过反复的试验调试和控制器参数修改,不但使转子顺利超越第一阶挠性临界旋转速度,而且实现转子停留在该旋转速度长期稳定的运行,积累了实际工程中电磁轴承支承的转子过临界旋转速度的经验。试验表明电磁轴承能有效地抑制转子的振动。A mathematic model of active magnetic bearing (AMB) rotor was formulated using the modal truncation method for an experimental helium turbo rotor in a 10 MW high temperature gas cooled test module reactor. A controller was designed with the linear quadratic Gaussian (LQG) method. A phase compensator was connected with the LQG controller in series to restrain the rotor modal vibration. The rotor passed through the first flexible critical rotational speed, and rotated stably at this speed for a long time by interactively adjusting the setup and modifying the controller coefficients. Some engineering experiences were obtained for the rotor supported by AMB passing through the critical rotational speed. The experimental results show that AMB can effectively restrain rotor vibration.

关 键 词：电磁轴承 系统辨识 临界旋转速度 模态截断 

分 类 号：TH133.3[机械工程—机械制造及自动化] TH-133.7