Control of the Thermoforming Reheat Process using a Combination of Cycle-to-Cycle and In-Cycle Control

G. Meunier, G. Gauthier, and B. Boulet (Canada)


thermoforming, process control, in-cycle control, cycle to-cycle control, iterative learning control


A new hybrid control approach for the thermoforming reheat process which combines an in-cycle and cycle-to cycle controllers is presented in this paper. The real-time in-cycle controller converges to the desired sheet temperature much faster, while the cycle-to-cycle control algorithm adds some robustness to process uncertainties and reduces the risk of heater saturation.

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