A Non-Linear Fuzzy Controller for Magnetic Bearings without Premagnetization

This paper deals with the development of nonlinear fuzzy controllers. Because of their properties, such as robustness against external disturbing signals, nonlinear behaviour which is desired for a strongly nonlinear system, the possibilities to optimize the controller performances, etc., fuzzy controllers can be well used in such complex systems as magnetic bearings without premagnetization. Besides the discussions about adjusting the controllers, statements concerning the practical realization will be made.