Abstract
THERMOPLASTICS INJECTION MOLDING MACHINE CONTROL, PART IV: MOLD PACKING PRESSURE CONTROL USING I-PD, PD-PI, PI-PD AND 2DOF-2 CONTROLLERS COMPARED WITH AN ADAPTIVE IMC CONTROLLER
Galal Ali Hassaan*
ABSTRACT
The control of cavity packing pressure in injection molding machines is essential to maintain production of molded plastic parts with good quality and minimum defects. The paper presents the control of the cavity packing pressure phase using four controllers from the second generation of PID controllers (I-PD, PD-PI, PI-PD and 2DOF-2). A proper tuning technique is selected to tune the proposed controllers using an ITAE performance index. The step time response of the control system using the four proposed controllers is presented and compared with using an adaptive IMC controller used to control thesame process in a previous research work and the time-based characteristics are compared. The comparison reveals the best controller among the five controllers depending on a graphical and quantitative comparison study for both reference and disturbance inputs.
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