Research on Modeling and Simulation of Cooperative Control for Multi-degree-of-freedom Rotor System of Magnetic Bearing

Electromagnetic bearing has the advantages of no friction and wear, long life, no oil pollution, etc. and has a wide range of application prospects. For the rotor dynamic system of magnetic suspension bearing with nonlinear, high-dimensional characteristics, and load uncertainty and large-scale variation, a system is established. Based on the prototype model of the inverse system, the nonlinear decoupling pseudo-linearization of the system is carried out, and the cooperative controller for the pseudo-linearized system is designed, and a closed-loop control system based on the cooperative control strategy is constructed. The simulation results show that the multi-degree-of-freedom rotor dynamic system supported by the magnetic suspension bearing through the inverse system decoupling, under the action of cooperative control, the system has no overshoot, fast response speed, strong robustness against load disturbance, and good steady-state performance. Compared with the traditional PID control strategy, it has better dynamic performance and steady-state performance.