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Bubeck, Wolfgang

Wolfgang Bubeck

M.Sc.

Research Assistant "Real-time communication and control hardware"
Institute for Control Engineering of Machine Tools and Manufacturing Units

Contact

+49 711 685 82409
+4971168572409
Email

Seidenstr. 36
70174 Stuttgart
Germany
Room: 5.021

Office Hours

By arrangement.

Publications

Publications:

2021
1. Reiff, Colin ; Bubeck, Wolfgang ; Krawczyk, Daniel ; Steeb, Maximilian ; Lechler, Armin ; Verl, Alexander: Learning Feedforward Control for Laser Powder Bed Fusion. In: Procedia CIRP, Procedia CIRP. Bd. 96 (2021), S. 127–132. — 8th CIRP Global Web Conference
  - BibTeX
  - Link
  BibTeX
  @article{noauthororeditor, abstract = {Additive manufacturing is becoming increasingly important for industrial applications. Especially laser powder bed fusion processes play a decisive role. However, the technology often lacks in reliability and part quality due to complex process interactions and disturbing influences. To counteract these limitations, a flexible and high-dynamic control of relevant process parameters, taking into account the transient process conditions, is indispensable. Currently, the most process parameters are often kept constant, since the used control systems do not offer real-time capable interfaces for intervention. To enable the adjustment of parameters during the process, an open control architecture for galvanometer scanners and laser sources was developed. The architecture is based on an industrial control system in combination with a field-programmable gate array (FPGA) communicating via a real-time fieldbus. The novel control architecture is used to integrate a model-based feedforward control, adjusting the laser power, scan speed and scan strategy based on the current powder bed temperature calculated by a two-dimensional thermal model during run time. An integrated learning algorithm autonomously tunes the process parameters during the manufacturing process and determines the optimal combination of laser power, scan speed and powder bed temperature to achieve a homogeneous melt pool. On average, the standard deviation of the powder bed temperature along the scan path was reduced by 48% for the simulated test cases.}, author = {Reiff, Colin and Bubeck, Wolfgang and Krawczyk, Daniel and Steeb, Maximilian and Lechler, Armin and Verl, Alexander}, doi = {https://doi.org/10.1016/j.procir.2021.01.064}, journal = {Procedia CIRP}, note = {8th CIRP Global Web Conference}, pages = {127-132}, title = {Learning Feedforward Control for Laser Powder Bed Fusion}, url = {https://www.sciencedirect.com/science/article/pii/S2212827121000883}, volume = 96, year = 2021 }
  Link
  https://www.sciencedirect.com/science/article/pii/S2212827121000883
2019
1. Wulle, Frederik ; Bubeck, Wolfgang ; Elser, Anja ; Wolf, Martin ; Verl, Alexander: Trajektorienplanung mittels modellprädiktiver Vorsteuerung eines FDM-Druckkopfes. In: 26. Stuttgarter Kunststoffkolloquium, 26. Stuttgarter Kunststoffkolloquium : IKT, Universität Stuttgart, 2019 — ISBN 978-3-9818681-1-1, S. 83–88
  - BibTeX
  BibTeX
  @conference{wulle2019trajektorienplanung, abstract = {Das dynamische Verhalten von Kunststoffextrudern wird in der Trajektorienplanung bei der Additiven Fertigung kaum berücksichtigt. Dies verursacht Prozess- und Bauteilqualitätsminderungen, die vor allem in den Anfahr- und Endphasen beim Ablegen von Raupen sichtbar werden. Durch eine modellprädiktive Vorsteuerung auf Basis einer Dynamikmodellierung des Kunstoffes im Extruder kann der Volumenstrom jedoch geregelt werden. Diese Trajektorienplanung läuft auf der CNC in Echtzeit und beeinflusst zusätzlich die Trajektorie des Druckkopfs. Anhand eines Beispiels wird ein Lösungsvorschlag für eine Modellierung und Implementierung erläutert.}, author = {Wulle, Frederik and Bubeck, Wolfgang and Elser, Anja and Wolf, Martin and Verl, Alexander}, booktitle = {26. Stuttgarter Kunststoffkolloquium}, eventdate = {28.03.2019}, isbn = {978-3-9818681-1-1}, language = {deutsch}, month = {03}, pages = {83-88}, publisher = {IKT, Universität Stuttgart}, title = {Trajektorienplanung mittels modellprädiktiver Vorsteuerung eines FDM-Druckkopfes}, venue = {Stuttgart}, year = 2019 }

Teaching

Supervision of bachelor, study and master theses.

Wolfgang Bubeck

Contact

Office Hours

Publications

2021

BibTeX

Link

2019

BibTeX

Teaching

Audience

Formalities

Services

Organization

Wolfgang Bubeck

Contact

Office Hours

Publications

2021

BibTeX

Link

2019

BibTeX

Teaching

Here you can reach the ISW

Audience

Formalities

Services

Organization