Decoupling control for active magnetic bearing

A decoupling control approach has been developed for a nonlinear system of a six degree-of-freedom rotor supported by active magnetic bearings. A nonlinear controller based on dynamic feedback linearization is designed such that the strongly coupled rotor motion is reduced to six decoupled normalization linear subsystems including five rotor displacements and its speed. The linearized system improves the transient response of the system. Satisfactory performance of the decoupled system is obtained.