Title :
Limitation of linear controllers for the precision magnetic bearing with uncertainties
Author :
Kubota, T. ; Youcef-Toumi, K.
Author_Institution :
Dept. of Mech. Eng., MIT, Cambridge, MA, USA
Abstract :
In order to investigate the achievable performance robustness of the control system for magnetic bearings used for precise positioning, the μ-synthesis is applied to an existing system. With structured singular value plots, the limitation of linear controllers for the magnetic bearing with unknown rotor mass is evaluated. The increase in controller gain when the system is close to its performance limit is revealed. The achievable robustness with bandwidth limit is also evaluated to achieve stability robustness for the system with high-frequency unmodeled dynamics
Keywords :
H∞ control; control system synthesis; dynamics; linear systems; magnetic levitation; position control; robust control; rotors; H∞ control; control synthesis; dynamics; linear controllers; magnetic bearing; position control; robust control; robustness; rotor; stability; Bandwidth; Control systems; Magnetic analysis; Magnetic forces; Magnetic levitation; Robust control; Robust stability; Robustness; Sliding mode control; Uncertainty;
Conference_Titel :
American Control Conference, 1998. Proceedings of the 1998
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-4530-4
DOI :
10.1109/ACC.1998.703022
