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

doi:10.3901/JME.2021.17.173

Abstract

Abstract: The electromagnetic bearing has the advantages of no friction and wear, long life and no oil pollution, and has wide application prospects. Aiming at the non-linearity, high-dimensional characteristics, load uncertainty and large-scale variation of the magnetic suspension bearing rotor power system, the prototype model of the system is established. Based on the inverse system, the non-linear decoupling pseudo-linearization of the system is carried out, and the cooperative controller of the pseudo-linearized system is designed. The closed-loop control system based on the cooperative control strategy is constructed, and the system is simulated and studied. The simulation results show that the multi-degree-of-freedom rotor power system supported by magnetic suspension bearing decoupled by inverse system has the advantages of no overshoot, fast response, strong robustness against load disturbance and good steady-state performance under the cooperative control. Compared with the traditional PID control strategy, the system has better dynamic and steady-state performance.

Key words: magnetic bearing, rotor, cooperative control, mathematical model, simulation

CLC Number:

TM355

ZHU Zhida, WANG Wenjun, KOU Haijiang, ZENG Li, DAI Min, ZHANG Fan. Research on Modeling and Simulation of Cooperative Control for Multi-degree-of-freedom Rotor System of Magnetic Bearing[J]. Journal of Mechanical Engineering, 2021, 57(17): 173-184.

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