Selective Laser Melting (SLM) is an Additive Manufacturing (AM) technique with challenges in its complexity of process parameters and lack of control schemes. Traditionally, people tried time-domain or frequency-domain control methods, but the complexity of the process goes beyond these methods. In this paper, a novel spatial transformation of SLM models is proposed, which transforms the time-domain process into a spatial domain model and, thus, allows for state-space layer-to-layer control methods. In a space domain, this also provides the convenience of modelling laser path changes. Finally, a layer-to-layer Iterative Learning Control (ILC) method is designed and demonstrates the methodology of spatial control for SLM. A simulation demonstrates its application and performance.
X. Wang et al., "Spatial Transformation of a Layer-To-Layer Control Model for Selective Laser Melting," Proceedings of the American Control Conference, pp. 2886 - 2891, Institute of Electrical and Electronics Engineers, Jan 2022.
The definitive version is available at https://doi.org/10.23919/ACC53348.2022.9867850
Mechanical and Aerospace Engineering
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Article - Conference proceedings
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01 Jan 2022