Multi-Objective Control of Active Magnetic Bearings-Flexible Rotor Based on NSGA-II Optimization

In the active magnetic bearings (AMBs)-flexible rotor system, decentralized PID control is usually adopted to achieve stability control. In this paper, a multi-objective control based on recursive open-loop adaptive control (MO-ROLAC) algorithm is designed on the basis of PID control, which can realize multi-objective control including vibration displacement, bearing transmission force and control current. In order to simplify the selection of weight coefficients in the controller, a multi-objective optimization algorithm NSGA-II is introduced. Simulation results show that the controller designed in this paper has obvious control effect and can simultaneously reduce vibration displacement, transmission force and control current.