| Summary: | 碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 98 === The purpose of this thesis is that Pid control,fuzzy control strategy using a pid-like scheme and Variable Structure Controll are proposed to control the position of a magnetic levitation system. The controllers to cope with the uncertainties, such as the friction force in many studies, and the high nonlinearity of the magnetic levitation system.
Then, in order to get the better tracking performance, fast rise-time and well maintained damped response,we use tries by mistake method or the simplex method can only discover the local best value or the possible closed global best value, but actually cannot guarantee each time for the closed global best value. The present paper proposed that improves the Nelder-Mead Simplex Methodand and Taguchi Design can cause the solution to achieve optimized of closed global solution.
Taguchi design method to filter out the initial value of the greatest impact on the system parameters of the optimal solution, then by the Taguchi method combination of selected search scope to do so on the Modified Nelder-Mead Simplex Method which requires a lot of search time available to improve and to quickly make accurate local solutions to global optimization solution probability greatly enhanced.
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