Decoupling control of electromagnetic bearing rigid rotor system based on IGWO and linear active disturbance rejection inverse system

Abstract This study proposes a decoupling control strategy integrating an improved grey wolf optimization algorithm (IGWO) and a linear active disturbance rejection inverse system for rigid rotor system control in electromagnetic bearings. Initially, a mathematical model of the radial four-degree-of-freedom electromagnetic bearing rotor system is developed, and the system is decoupled into four pseudo-linear subsystems via the inverse system method. To address the model dependency of the inverse system, a linear active disturbance rejection controller (LADRC) is designed to regulate the decoupled subsystems. Furthermore, the IGWO algorithm is implemented to rapidly optimize LADRC parameters, enhancing the controller’s dynamic response. Comparative simulations and experiments against decentralized PID control demonstrate the proposed method’s superior performance in decoupling accuracy, settling time, and disturbance rejection.