Fuzzy ball position control in the magnetic field

A fuzzy logic based controller applied to a ball position control in the magnetic field is presented in this paper. The magnetic suspension system and the contact-less optical position measurement system have been developed. The fuzzy PID controller has proportional, integral and derivative separate parts which are tuned independently. This means that all parts have their own rule bases. By testing it was formed out that the fuzzy PID controller gives better performance over a typical operational range then a traditional linear PID controller.