ROTODYNAMIC MODELING OF AN ACTIVELY CONTROLLED MAGNETIC BEARING GAS-TURBINE ENGINE

This paper summarizes the development of a finite element rotordynamic solution used in a closed loop simulation for a magnetic bearing roto r system in a gas turbine engine. A magnetic bearing controlled rotor is analyzed, and the state dynamics matrix [A], the shaft control infl uence matrix [B], and the sensor matrix [C] are constructed. Bode plot s of the state-space transfer function are also constructed and compar ed to the results of the rotor dynamic model.