Application of discrete-time gain-scheduled Q-parameterization controllers to magnetic bearing systems with imbalance

1999 ◽  
Keyword(s):  
Discrete Time ◽  
Magnetic Bearing ◽  
Gain Scheduled

Application of gain scheduled H/sub ∞/ robust controllers to a magnetic bearing

1996 ◽  
Vol 4 (5) ◽  
pp. 484-493 ◽  
Author(s):  
F. Matsumura ◽  
T. Namerikawa ◽  
K. Hagiwara ◽  
M. Fujita
Keyword(s):  
Magnetic Bearing ◽  
Robust Controllers ◽  
Gain Scheduled

Analysis and Testing of a Magnetic Bearing Energy Storage Flywheel With Gain-Scheduled, MIMO Control

2000 ◽  
Author(s):  
Lawrence A. Hawkins ◽  
Brian T. Murphy ◽  
John Kajs
Keyword(s):  
Energy Storage ◽  
Dynamic Test ◽  
Magnetic Bearing ◽  
System Stability ◽  
University Of Texas ◽  
Mimo Control ◽  
Cross Axis ◽  
Five Axis ◽  
Gain Scheduled ◽  
Bearing System

The design and initial testing of a five axis magnetic bearing system in an energy storage flywheel is presented. The flywheel is under development at the University of Texas Center for Electromechanics (UT-CEM) for application in a transit bus. The bearing system for the prototype features homopolar permanent magnet bias magnetic bearings. The system has been successfully tested to the maximum design speed of 42,000 rpm. A gain-scheduled, MIMO control algorithm was required to control the system modes affected by rotor gyroscopics. The implementation and basis for this control scheme is discussed. The cross-axis forces produced by this approach are described in terms of circumferential cross-coupled stiffness and damping to explain the effect on system stability. Dynamic test results are discussed relative to the rotordynamic and control system design.

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