摘要
磁悬浮动量轮系统中,为避免中频段存在的两个结构模态振动破坏系统的稳定运行,采用特殊的控制方法对其进行抑制。为获取结构振动参数,通过一种非参数频域辨识方法对系统模型进行辨识,辨识结果显示其中一个结构共振频率随控制器刚度变化而发生显著变化。由于理论建模存在困难,使用一种基于叠代过程的方法抑制共振,叠代过程包括辨识与控制器参数的调整。在进行控制器设计时,分别采用基于零极点对与μ综合的方法进行控制器设计。试验证明叠代过程是有效的,两种方法设计出来的控制器均可以很好地抑制系统结构模态的振动。
In a momentum wheel system suspended by active magnetic bearings, the stability of the system is influenced by two severe resonances coming from the structure of the system at a middle frequency band. Special controller designs are used to restrain them. A non-parametric frequency domain method is used to identify the system model to obtain structure vibration information. It is found that the frequency of one of the structure resonances varies markedly with controller stiffness.Modeling the resonances is difficult, and a convenient method based on an iterative process of identification and controller parameter tuning is used to deal with the resonances. In controller designs of the process, a zero-pole pair method and a μ-synthesis method are applied respectively. The experiments show that the iterative process is effect and two controllers designed by the two methods respectively are both suitable for restraining the structure vibrations.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2007年第6期220-225,共6页
Journal of Mechanical Engineering
关键词
磁悬浮轴承
飞轮
振动控制
Active magnetic bearing Flywheel Vibration control
