The research of the novel bearingless levitation system based on Extended State Observer (ESO)

At present, the classical control strategy of PID is widely adopted in the bearingless levitation system. However, it is hard to realize high performance of levitation control, due to the influence of disturbance, parameters perturbation etc. Aiming at the problem above, the novel bearingless levitation system based on Extended State Observer (ESO) is suggested in this paper. According to the basic principle that ESO can obverse the total disturbance, the mathematical model of the system is built. The stability of the system is analyzed, and the parameters adjustment is demonstrated theoretically, which provides a new method for the levitation control system. Meanwhile, the range of the parameters is specified in the stable region. Moreover, combining with the physical significance of the main parameters, the principle of the parameters adjusting in the nonlinear Extended State Observer is improved. Finally, by simulation, it is verified that ESO makes a significant contribution to the disturbance rejection of the bearingless levitation system, and the validity of the scheme above is proved.

[1]  Han Jing-qing.  Stability Analysis and Synthesis of Third Order Discrete Extended State Observer , 2008 .

[2]  Gao Feng,et al.  A new synthesis method for unit coordinated control system in thermal power plant - ADRC control scheme , 2004, 2004 International Conference on Power System Technology, 2004. PowerCon 2004..

[3]  Yuxin Su,et al.  Disturbance-rejection high-precision motion control of a Stewart platform , 2004, IEEE Transactions on Control Systems Technology.

[4]  He Yi-kang.  H-infinity robust control of the suspension system for a bearingless motor of permanent magnet type , 2008 .

[5]  Yuxin Su,et al.  Automatic disturbances rejection controller for precise motion control of permanent-magnet synchronous motors , 2005, IEEE Transactions on Industrial Electronics.

[6]  Zhu Huangqiu.  Active disturbance rejection control for axial hybrid magnetic bearings of bearingless motors , 2008 .

[7]  Zhiqiang Gao,et al.  A novel motion control design approach based on active disturbance rejection , 2001 .

[8]  Zengguang Hou,et al.  A Novel Control Method for a Class of Cascade Nonlinear Systems , 2006, 2006 IEEE International Conference on Networking, Sensing and Control.

[9]  Jingqing Han,et al.  From PID to Active Disturbance Rejection Control , 2009, IEEE Trans. Ind. Electron..

[10]  M.A. Rahman,et al.  An identification method of suspension force and magnetic unbalance pull force parameters in buried-type IPM bearingless motors , 2004, IEEE Power Engineering Society General Meeting, 2004..

[11]  Klaus Nenninger,et al.  Developments on Bearingless Drive Technology , 2003 .