The Design of Sliding Mode Controller for Mold Level Control System

• Main Authors: Wan-Sheng Zheng, 鄭菀升
• Other Authors: Chih-Chiang Cheng
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/82880927040845162680

碩士 === 國立中山大學 === 電機工程學系研究所 === 89 === A sliding mode controller is proposed for controlling molten steel level in a mold of continuous casting machine in this thesis. The comparisons of dynamic response, control accuracy, and reaction to perturbation between proposed controller and PID controller currently used are also presented. A perturbation estimator is embedded in the sliding mode controller in order to enhance the robustness against model uncertainty, parameter variation, and external disturbance. The perturbation considered in this thesis includes variation of casting speed, variation of area of slide gate, time delay, variation of mold area, and Dead-Band etc.. In addition, the effects of adjusting the design parameter of the proposed controller on system’s dynamics are also considered.