钢板磁悬浮系统加速度反馈控制  

Acceleration Feedback Control for Steel Plate Magnetic Suspension System

作　　者：李奇南[1] 陈敏[1] 徐德鸿[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《中国电机工程学报》2010年第36期123-128,共6页Proceedings of the CSEE

摘　　要：为提高钢板磁浮系统抑制扰动的能力,利用实测加速度信号实现加速度反馈控制。首先,阐述加速度反馈可实现悬浮系统静刚度、带宽及阻尼独立调节的机理。针对实际应用中钢板谐振效应对实施加速度反馈的制约,建立考虑钢板谐振效应的悬浮系统模型,分析谐振效应对悬浮系统闭环稳定性的影响,提出采用加速度陷波器以抑制谐振的控制策略。其次,为快速准确测量钢板谐振频率,简化陷波器实现,采用自适应陷波器实现钢板谐振频率的在线辨识及陷波功能。最后,给出悬浮系统性能指标的选取方法及控制参数的设计方法。在一台单自由度钢板磁浮装置上验证加速度反馈控制的有效性。实验结果表明,所提的控制方案可提高悬浮系统的静、动态悬浮刚度。In order to improve the anti-disturbance ability of steel plate magnetic levitation systems,measured acceleration signals are used to realize acceleration feedback control.Firstly,a mechanism that independent regulation of suspension stiffness,bandwidth,and damping ratio can be achieved by acceleration feedback was introduced.To overcome the constraint in implementation of acceleration control due to resonant effect,a model of suspension systems considering resonant effect was derived and its influence on closed loop stability was analyzed.A control strategy that employs an acceleration notch filter to attenuate vibration was proposed.Secondly,in order to fast and accurately measure the resonance frequency,and simplify the implementation of the notch filter,an adaptive notch filter is adopted to identify the resonant frequency and realize the function of the notch filter.Finally,the method for performance index selection,and the way to optimize controller parameters were discussed.Experiments were carried out to verify the validity of acceleration feedback control based on the prototype.Experimental results showed that the proposed control strategy can enhance static and dynamic suspension stiffness.

关 键 词：磁悬浮控制 加速度反馈 谐振效应 自适应陷波 

分 类 号：TM273[一般工业技术—材料科学与工程]