Decoupling control for a 5-DoF rotor supported by active magnetic bearings

Decoupling control approach has been developed for a nonlinear system with a rotor of five degree-of-freedom supported by two radial magnetic bearings. Nonlinear controllers based on dynamic feedback linearization are designed such that the strongly coupled rotor motion is reduced to five decoupled normalization linear subsystems including four rotor displacements and its speed. The linearized systems improve the transient responses of the system. Some simulations are employed, and satisfactory performance of the decoupled system is obtained.