Improving SLM additive manufacturing operation precision with H-infinity controller structure

Fetra Rasoanarivo (1) , Didier Dumur (1) , Pedro Rodriguez-Ayerbe (1)

1 L2S - Laboratoire des signaux et systèmes

SLM (Selective Laser Melting) is the most widespread additive manufacturing technique of metal part. The desired part is elaborated through local melting of a raw metal powder bed by means of laser. In industrial machines, galvanometer motors achieve the laser beam deflection and focus control tasks. This paper proposes a H-infinity controller synthesis which improves the system accuracy and robustness towards physical features. Compared to a conventional control scheme, results obtained with the H-infinity controller implemented in an open architecture test bench consisting of a 2-axis laser deflection system showed improved accuracy performance while operation rapidity is optimized.

Mots clés: Control; Modelling; Additive Manufacturing; Galvanometer; H-infinity control

Domaines: Automatique / Robotique; Sciences de l'ingénieur [physics]

Fetra Rasoanarivo, Didier Dumur, Pedro Rodriguez-Ayerbe. Improving SLM additive manufacturing operation precision with H-infinity controller structure. CIRP Journal of Manufacturing Science and Technology, 2021, 33, pp.82-90. ⟨10.1016/j.cirpj.2020.09.007⟩. ⟨hal-03183358⟩