Liquid Sloshing Suppression Using Fuzzy Logic Control

• Main Authors: Zhao-Liang Hong, 洪肇良
• Other Authors: 馮蟻剛
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/53199272099274905500

碩士 === 國立臺灣大學 === 電機工程學研究所 === 95 === In this thesis, a pendulum-type model is constructed to represent the liquid sloshing behavior in a rectangular container, caused by the motion of a one dimension ball-screw table. A fuzzy rule-based controller is adopted to damp the liquid sloshing and keep the cart near the center of the ball-screw table. In the controller, two fuzzy sub-controllers are designed to respectively control the liquid sloshing and the table displacement, and the sloshing control rules are based on pendulum model. The effectiveness of the adopted method is demonstrated through simulations and experimental results. In the experiment, it is seen that friction exists unavoidably in the ball-screw table. The nonlinear behaviors induced by friction would limit the performance of the system. In order to get a better performance, the LuGre model of friction is used for designing a compensation scheme.