Research on Active Disturbance Rejection Control of Active Magnetic Bearing-Rotor System

Aiming at the problem that the control effect of PID-controlled active magnetic bearing (AMB)-rotor system cannot meet technical requirements of high-speed motors, this paper proposes to apply active disturbance rejection control (ADRC) to the AMB-rotor system. On the basis of introducing the structure of the radial four-degree-of-freedom (DOF) AMB, the dynamic model of the AMB-rotor system is established, and the ADRC for the single-DOF rotor system and the active disturbance rejection decoupling control for the four-DOF rotor system are proposed. According to the parameters of the prototype, a single-DOF ADRC simulation system and a four-DOF ADRC simulation system are constructed, the model established by Simulink compares the response performance of PID and ADRC under step response and the anti-interference ability of sudden interference. It can be seen from the simulation results that the AMB-rotor system controlled by ADRC can achieve stable suspension operation, with better stability, faster response, and stronger robustness