| Summary: | 碩士 === 國立中正大學 === 機械工程學系 === 85 === The performance of PID controlled magnetic bearings is
greatly degradedif subjected to unpredictable disturbance or
system uncertainties. This Th-esis proposes a Fuzzy-PID
controller for a magnetically suspended flexiblerotor system
with disturbance rejection and plant uncertainties. The Fuzzy-
PID controller conjoins the merits of the fuzzy and PID
controller. Makinguse of the concept of the fuzzy set, the
control parameter can be tuned ac-cording to the response of the
system. The basic control rule is based on the knowledge of the
conventional PID control. Then, the control rule and the
membership function are modified by the response of the magnetic
system. The Fuzzy-PID controller will then imitate the
operational policy. We pr-ove that the designed fuzzy-PID
control system is asymptotically stable. Finally, Simulation
results verify the analysis and hence show that the Fuzzy-PID
controller is feasible for the magnetic bearing system.
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