抑制磁浮系统车轨耦合振动的自适应陷波滤波器设计

Design of Adaptive Notch Filter to Suppress Coupled Vibration of Maglev Vehicle and Guideway System

摘要: 为解决磁浮系统中的耦合振动问题，利用递推最小二乘法，讨论了自适应陷波滤波器的设计方法．该设计方法比常规FFT方法工作量小，对频率变化响应迅速．仿真结果表明，该滤波器能够达到预期效果．随后利用伯德图和奈奎斯特稳定性判据，分析了陷波滤波器对控制系统稳定性的影响，表明加入陷波滤波器可以使得控制参数的稳定范围扩大，系统性能提高．最后，仿真结果证明了陷波滤波器抑制振动的有效性．

Abstract: In order to solve the coupled vibration problem in maglev systems,an adaptive notch filter design method is discussed based on the recursive least squares(RLS) method.Superior to the fast Fourier transform(FFT) method,the presented design method needs less design effort and can respond quickly to frequency variance.Simulations show that the filter can get the expected effects.Then,Bode diagram and Nyquist stability theory are used to analyze the influence of the notch filter on the control system stability,and the analysis results indicate that the notch filter can extend the stable control parameter field,and the system performance is improved.Finally,the simulation results are given to testify that the notch filter can suppress the vibration effectively.