About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Node-Based Closed-Loop Control in Robotic Laser-Wire Directed Energy Deposition |
Author(s) |
Jakob D. Hamilton, Walter Glockner |
On-Site Speaker (Planned) |
Jakob D. Hamilton |
Abstract Scope |
Directed energy deposition (DED) additive manufacturing suffers from dynamic melt conditions and process instabilities, leading to stochastic defects and substandard part quality. Advanced in simulation, sensing, and data analytics offer new routes in intelligent feedforward and feedback control but are difficult to implement in DED systems based on traditional computer numerical control (CNC). This work leverages advances in industrial control by decentralizing the process components to individualized nodes. Node-based delegation offers improved scalability and process flexibility in terms of sensing modalities and control mechanisms. A decentralized DED control system is demonstrated using Robotic Operating System, or ROS2, on a laser-wire DED testbed. Thin-wall samples were fabricated using prescriptive parameters and multi-modal closed-loop control. Geometric uniformity and consistent layer heights were demonstrated in closed-loop control samples, lending credibility to node-based feedback control. Embedding intelligence via decentralized control in DED is the first step toward building defect-free geometries and advanced material systems. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |