Title :
A vector oriented control for a magnetically levitated shaft
Author :
De Miras, Jereme ; Charara, Ali
Author_Institution :
UTC, CNRS, Compiegne, France
fDate :
7/1/1998 12:00:00 AM
Abstract :
Considering the nonlinear model of active magnetic bearings, a new means of nonlinear control is presented which treats variables as rotating vectors in the control plane, specially the unbalance. It becomes easy to cancel out the effect of this perturbation in a rotating reference. Therefore, the rotor can rotate around any desired point, particularly the geometric center or the center of gravity. Simulations illustrate the efficacy of this control law
Keywords :
Lyapunov methods; asymptotic stability; compensation; control system synthesis; machine bearings; machine control; magnetic levitation; nonlinear control systems; observers; state estimation; state feedback; three-term control; vectors; active magnetic bearings; center of gravity; control law; geometric center; magnetically levitated shaft; nonlinear control; nonlinear model; rotating vectors; unbalance; vector oriented control; Actuators; Coils; Equations; Force control; Gravity; Magnetic levitation; Magnetic variables control; Open loop systems; Rotors; Shafts;
Journal_Title :
Magnetics, IEEE Transactions on
