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Fuzzy Sliding Mode Control for Enhancing Injection Velocity Performance in Injection Molding Machine
In this study, injection velocity in injection molding process was analyzed. Since physical behavior of thermoplastic and environmental condition in injection machine such as high temperature and pressure make a complex dynamics in injection molding system, the injection velocity is consequently difficult to control by some classical control methods. Hence, robust and adaptive control (Fuzzy Sliding Mode Control) was proposed to control the injection velocity in finite time. In this control strategy, sliding mode control intended to overcome system dynamics, while Fuzzy controller would decrease both output error and chattering phenomena due to sliding mode process. The simulation results showed that proposed control could decrease chattering phenomena and followed velocity set point with small error. The two cycles of set point were also presented to examine controller’s robustness. In future, this proposed control can be potentially applied in real system.
Injection velocity, injection molding, fuzzy control, sliding mode control, fuzzy sliding mode control
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