Title :
Magnetic bearing control systems and adaptive forced balancing
Author :
Shafai, B. ; Beale, S. ; LaRocca, P. ; Cusson, E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
fDate :
4/1/1994 12:00:00 AM
Abstract :
Active magnetic bearing (AMB) actuators support rotors without friction but require feedback control for stabilization and performance. We address the application of modern control techniques such as LQG/LTR, H/spl infin/, and QFT to AMB systems. We also introduce a novel method called adaptive forced balancing (AFB) which solves the problem of synchronous vibration caused by mass unbalance. Simulation and experimental results are included to show the performance of AFB as applied to single-end AMB suspensions (SISO systems). Finally, AFB with frequency tracking and its generalization for double-end AMB suspensions (MIMO systems) are briefly explored.<>
Keywords :
compensation; digital control; magnetic levitation; multivariable control systems; optimal control; rotors; stability; vibration control; H/spl infin/; LQG/LTR; MIMO systems; QFT; SISO systems; active magnetic bearing actuators; adaptive forced balancing; double-end suspensions; frequency tracking; magnetic bearing control systems; mass unbalance; rotors; single-end suspensions; synchronous vibration; Actuators; Adaptive control; Adaptive systems; Control systems; Feedback control; Force control; Friction; Magnetic levitation; Programmable control; Suspensions;
Journal_Title :
Control Systems, IEEE
