关键词: 主动磁轴承, 振动抑制, 自适应陷波器, 自抗扰控制, 状态观测器

Abstract: In order to achieve the suppression of rotor unbalance perturbations, sensor runout and uncertainty perturbations of the magnetic levitation system, a composite control method combining active disturbance rejection control ( ADRC) and cascaded adaptive notch filter was designed. The dynamics model of the magnetic levitation rotor was designed, and the sources and forms of system perturbations were analyzed. A control strategy based on the normalized least
mean square( NLMS) algorithm combining an adaptive trap with a third-order linear extended state observer was designed. Simulation and experimental validation were carried out, and the results show that the designed composite control method could reduce the rotor displacement by about 41. 4% compared with the PID control alone under the disturbances of rotational speed homodyne, octave perturbation and low-frequency perturbation.

Key words: active magnetic bearing, vibration suppression, adaptive notch filter( ANF), active disturbance rejection control ( ADRC), extended state observer ( ESO)