K. Classens, T. Hafkamp, S. Westbeek, J.J.C. Remmers, and S. Weiland,
Proceedings of the IEEE American Control Conference, New Orleans, Louisiana, 2021.
Abstract:
In the context of additive manufacturing (AM) and 3D Printing, vat photopolymerization is an established technique in which photopolymer is selectively solidified to form a near-net-shape part. Photopolymerization-based AM is increasingly being adopted by the high-tech industry, but the technology still faces several challenges in terms of consistency in product quality, understanding of the UV curing process, in-situ process monitoring, and real-time closed-loop control. This paper aims to demonstrate the potential of model-based control of the UV curing process. The curing process is modelled and anticipatively controlled with an optimal control law for nonlinear systems, derived via a sequential linearization strategy. The potential of this approach is proven by means of both simulations that illustrate a one-dimensional spatial optimal tracking problem and experiments that validate a zero dimensional controlled system.
Available online at https://doi.org/10.23919/ACC50511.2021.9483091 [pdf]