| Summary: | 碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 102 === In the imprinting fabrication process, because the control of speed and tension is important, the proper transmitting speed and tension can improve product quality. There are system uncertainty problems of unknown system nonlinear functions and external disturbances in a roll-to-roll fabrication machine, and these problems will need to be compensated to improve the control performance. This study will use the sliding mode control and the extended state observer based sliding mode control theories to design controllers of speed and tension. The difference of two controllers: in sliding mode controller, unknown system nonlinear functions and external disturbances are assumed to be known; in another, a so-called extended state observer is used to estimate unknown system nonlinear functions and external disturbances in the system. From simulation results, it is shown that the sliding mode control is better than extended state observer based sliding mode control. However, the condition of the system nonlinear functions and external disturbances must be known in advance for designing the sliding mode controller. It is worth noting that the extended state observer based sliding mode control can be implemented without that the system uncertainty factor of unknown system nonlinear functions and external disturbances must be known in advance. In experiment results, the extended state observer based sliding mode control is better than sliding mode control. In conclusion, the proposed two control schemes can be applied to control the web transmitting speed and tension in the roll-to-roll experimental facility and they can achieve the control goals satisfactorily.
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