control system analysis computing, control system synthesis,   frequency response, system identification, magnetic bearings, magnetic levitation, nonlinear control systems, rotors, turbines, velocity control, MATLAB, mBC 500 magnetic bearing system, active magnetic bearings, air turbine speed control, computer simulation, control simulation, dSPACE DS1102 digital signal processor board, frequency domain, frequency response data, internal air turbine drive, nonlinear control, rotor, speed controller design, time domain, compressors, flywheels, frequency domain analysis, jet engines, mathematical models, signal design, turbines, velocity control