GA-Based Fuzzy PI Controller Design for Piezopositioning Stages

• Main Authors: Pei-Fu Wu, 吳培輔
• Other Authors: Hsin-Jang Shieh
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/38426016308894530373

碩士 === 國立東華大學 === 電機工程學系 === 97 === The objective of this thesis is to develop a GA-based fuzzy PI controller for trajectory tracking of a two-dimensional piezopositioning stage. In the beginning of the thesis, a proportional-integral-differential (PID) controller is adopted for the tracking controller. However, it is difficult for the PID controller to give a good performance in transient tracking response of the piezopositioning stage with hysteresis nonlinearity. To obtain an improved transient performance in tracking response, the fuzzy PI controller is developed. Moreover, to avoid adopting the trial-and-error method to set the parameters values of the fuzzy PI controller, the GA-based fuzzy PI controller is further developed. The validity of the developed controllers are illustrated by simulation and experimental results.