scholarly journals A Robust Nonlinear Controller with Application to a Magnetic Bearing System

2006 ◽  
Author(s):  
A.L. Driemeyer Franco ◽  
H. Bourles ◽  
E.R. De Pieri
Keyword(s):  
Magnetic Bearing ◽  
Nonlinear Controller ◽  
Robust Nonlinear Controller ◽  
Bearing System

scholarly journals Nonlinear Behavior of a Magnetic Bearing System

1995 ◽  
Vol 117 (3) ◽  
pp. 582-588 ◽  
Author(s):  
L. N. Virgin ◽  
T. F. Walsh ◽  
J. D. Knight
Keyword(s):  
Degrees Of Freedom ◽  
Initial Conditions ◽  
Nonlinear Behavior ◽  
Analytical Techniques ◽  
Magnetic Bearing ◽  
Forced Response ◽  
The Mathematical Model ◽  
Two Degree Of Freedom ◽  
Sensitivity To Initial Conditions ◽  
Bearing System

This paper describes the results of a study into the dynamic behavior of a magnetic bearing system. The research focuses attention on the influence of nonlinearities on the forced response of a two-degree-of-freedom rotating mass suspended by magnetic bearings and subject to rotating unbalance and feedback control. Geometric coupling between the degrees of freedom leads to a pair of nonlinear ordinary differential equations, which are then solved using both numerical simulation and approximate analytical techniques. The system exhibits a variety of interesting and somewhat unexpected phenomena including various amplitude driven bifurcational events, sensitivity to initial conditions, and the complete loss of stability associated with the escape from the potential well in which the system can be thought to be oscillating. An approximate criterion to avoid this last possibility is developed based on concepts of limiting the response of the system. The present paper may be considered as an extension to an earlier study by the same authors, which described the practical context of the work, free vibration, control aspects, and derivation of the mathematical model.

scholarly journals Digital Linear Control System for a Magnetic Bearing System of a High Vacuum Turbomolecular Pump

2010 ◽  
Vol 19 (4) ◽  
pp. 256-264
Author(s):  
Seung-Kook Ro ◽  
Jin-Ho Kyung ◽  
Jong-Kweon Park ◽  
Woo-Ho Nam ◽  
Deug-Yong Koh
Keyword(s):  
Control System ◽  
High Vacuum ◽  
Magnetic Bearing ◽  
Linear Control System ◽  
Linear Control ◽  
Turbomolecular Pump ◽  
Bearing System
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