Improving SLM additive manufacturing operation precision with H-infinity controller structure. (May 2021)

• Record Type: Journal Article
• Authors: Rasoanarivo, Fetra; Dumur, Didier; Rodriguez-Ayerbe, Pedro
• Is Part Of: CIRP journal of manufacturing science and technology. Volume 33(2021)
• Page Start: 82
• Page End: 90
• Publication Date: 2021-05
• Subjects: Control -- Modelling -- Additive manufacturing -- Galvanometer -- H-infinity control; Manufacturing processes -- Periodicals; 670.5
• DOI: 10.1016/j.cirpj.2020.09.007
• Languages: English
• ISSNs: 1755-5817

Abstract

Abstract: 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.