Authors:
Laleh Hosseini-Ravanbod
and
Dominikus Noll
Affiliation:
Université Paul Sabatier, France
Keyword(s):
Scheduled controller for magnetic bearing, H∞ Optimal decentralized PID controller, Robust control, Distance to instability, Switching, Hysteresis, Interpolation.
Related
Ontology
Subjects/Areas/Topics:
Adaptive Signal Processing and Control
;
Informatics in Control, Automation and Robotics
;
Nonlinear Signals and Systems
;
Optimization Problems in Signal Processing
;
Signal Processing, Sensors, Systems Modeling and Control
Abstract:
Control of a magnetic bearing device is addressed by parameter varying control. Within the structure of decentralized PID controllers we compare linear interpolation and switching strategies with and without hysteresis. Piecewise LPV decentralized PID controllers are found to be an interesting alternative. Our method exploits the possibility to pre-compute for every parameter value an H∞ optimal decentralized PID controller, and to use this ideal model to construct practical scheduled controllers with an acceptable H∞ performance.