Control of selective laser melting processes: existing efforts, challenges, and future opportunities

Al-Saadi, Taha; Rossiter, J.A.; Panoutsos, George

doi:10.1109/med51440.2021.9480258

Cited by 5 publications

(2 citation statements)

References 37 publications

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Section: Introductionmentioning

confidence: 99%

“…An important challenge when developing closed-loop control for the SLM process is a lack of control-oriented models [6]. An effective way of controlling heat accumulation is by adjusting laser power to influence the process temperature [6]. Data-driven concepts using multiple in-situ sensors for closed-loop control are presented in [7], but require large training data sets.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In-layer Thermal Control of a Multi-layer Selective Laser Melting Process

Liao‐McPherson¹,

Balta²,

Wüest³

et al. 2022

2022 European Control Conference (ECC)

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Selective Laser Melting (SLM) is an additive manufacturing technology that builds three dimensional parts by melting layers of metal powder together with a laser that traces out a desired geometry. SLM is popular in industry, however the inherent melting and re-solidification of the metal during the process can, if left uncontrolled, cause excessive residual stress, porosity, and other defects in the final printed parts. This paper presents a control-oriented thermal model of a multilayer SLM process and proposes a structured model reduction methodology with an associated reduced order model based in-layer controller to track temperature references. Simulation studies demonstrate that the controller is able to prevent layerto-layer heat buildup and that good closed-loop performance is possible using relatively low-order models.

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Section: Introductionmentioning

confidence: 99%