Implementation of a PID-like fuzzy controller on a magnetic levitation system

• Main Authors: Jui-Pin Chen, 陳瑞斌
• Other Authors: C. C. Fuh
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/63360543706237603820

碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 97 === A fuzzy control strategy using a pid-like scheme is proposed to control the position of a magnetic levitation system. It is used to cope with the uncertainties, such as the friction force in many studies, and the high nonlinearity of the magnetic levitation system. The dynamic model of the magnetic levitation system is derived in the first. A pid-like fuzzy controller is proposed to compensate the uncertainties that occurred in the magnetic levitation system. A simple set of membership functions and fuzzy rules are applied, which meets certain control requirements of such system. Then, in order to get the better tracking performance, fast rise-time and well maintained damped response, we introduce an optimization algorithm, called simplex method, to obtain the better control gain. An off-line routine based on the simplex method is outlined to tune the control gains for an optimum response. The effectiveness of the proposed control strategy is verified by some simulations and experimental results.