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Article

Robust Additive Manufacturing Performance through a Control Oriented Digital Twin

Laboratory for Manufacturing Systems and Automation, Department of Mechanical Engineering and Aeronautics, University of Patras, 26504 Patras, Greece
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Academic Editor: Jafar Razmi
Metals 2021, 11(5), 708; https://doi.org/10.3390/met11050708
Received: 27 March 2021 / Revised: 21 April 2021 / Accepted: 22 April 2021 / Published: 26 April 2021
(This article belongs to the Special Issue Optimization of Metal Additive Manufacturing Processes)
The additive manufacturing process control utilizing digital twins is an emerging issue. However, robustness in process performance is still an open aspect, due to uncertainties, e.g., in material properties. To this end, in this work, a digital twin offering uncertainty management and robust process control is designed and implemented. As a process control design method, the Linear Matrix Inequalities are adopted. Within specific uncertainty limits, the performance of the process is proven to be acceptably constant, thus achieving robust additive manufacturing. Variations of the control law are also investigated, in order for the applicability of the control to be demonstrated in different machine architectures. The comparison of proposed controllers is done against a fine-tuned conventional proportional–integral–derivative (PID) and the initial open-loop model for metals manufacturing. As expected, the robust control design achieved a 68% faster response in the settling time metric, while a well-calibrated PID only achieved 38% compared to the initial model. View Full-Text
Keywords: additive manufacturing; digital twin; process control; process robustness additive manufacturing; digital twin; process control; process robustness
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MDPI and ACS Style

Stavropoulos, P.; Papacharalampopoulos, A.; Michail, C.K.; Chryssolouris, G. Robust Additive Manufacturing Performance through a Control Oriented Digital Twin. Metals 2021, 11, 708. https://doi.org/10.3390/met11050708

AMA Style

Stavropoulos P, Papacharalampopoulos A, Michail CK, Chryssolouris G. Robust Additive Manufacturing Performance through a Control Oriented Digital Twin. Metals. 2021; 11(5):708. https://doi.org/10.3390/met11050708

Chicago/Turabian Style

Stavropoulos, Panagiotis, Alexios Papacharalampopoulos, Christos K. Michail, and George Chryssolouris. 2021. "Robust Additive Manufacturing Performance through a Control Oriented Digital Twin" Metals 11, no. 5: 708. https://doi.org/10.3390/met11050708

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