Fuzzy Control Design and Analysis for Magnetic Bearing System with Flexible Rotor

• Main Authors: Haung, Jiann-Chin, 黃建欽
• Other Authors: Yang Li-Farm, Chen Shyh-Leh
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/76847049190790175758

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.