@inproceedings{KesslerBalcGebhardt2016, author = {Kessler, Julia and Balc, Nicolae and Gebhardt, Andreas}, title = {Basic research on lattice structures focused on the strut shape and welding beads}, series = {Physics Procedia}, volume = {Vol. 83}, booktitle = {Physics Procedia}, issn = {1875-3884}, doi = {10.1016/j.phpro.2016.08.086}, pages = {833 -- 838}, year = {2016}, language = {en} } @book{Feuerriegel2016, author = {Feuerriegel, Uwe}, title = {Verfahrenstechnik mit EXCEL: Verfahrenstechnische Berechnungen effektiv durchf{\"u}hren und professionell dokumentieren}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, isbn = {978-3-658-02902-9}, doi = {10.1007/978-3-658-02903-6}, pages = {XVII, 381 Seiten}, year = {2016}, language = {de} } @article{Wollert2018, author = {Wollert, J{\"o}rg}, title = {TSN - Schluss mit dem Feldbuskrieg?}, series = {Design \& Elektronik}, journal = {Design \& Elektronik}, number = {3}, publisher = {WEKA-Fachmedien}, address = {M{\"u}nchen}, issn = {0933-8667}, pages = {26 -- 31}, year = {2018}, language = {de} } @article{MichauxMatternKallweit2018, author = {Michaux, F. and Mattern, P. and Kallweit, Stephan}, title = {RoboPIV: how robotics enable PIV on a large industrial scale}, series = {Measurement Science and Technology}, volume = {29}, journal = {Measurement Science and Technology}, number = {7}, publisher = {IOP}, address = {Bristol}, issn = {1361-6501}, doi = {10.1088/1361-6501/aab5c1}, pages = {074009}, year = {2018}, abstract = {This work demonstrates how the interaction between particle image velocimetry (PIV) and robotics can massively increase measurement efficiency. The interdisciplinary approach is shown using the complex example of an automated, large scale, industrial environment: a typical automotive wind tunnel application. Both the high degree of flexibility in choosing the measurement region and the complete automation of stereo PIV measurements are presented. The setup consists of a combination of three robots, individually used as a 6D traversing unit for the laser illumination system as well as for each of the two cameras. Synchronised movements in the same reference frame are realised through a master-slave setup with a single interface to the user. By integrating the interface into the standard wind tunnel management system, a single measurement plane or a predefined sequence of several planes can be requested through a single trigger event, providing the resulting vector fields within minutes. In this paper, a brief overview on the demands of large scale industrial PIV and the existing solutions is given. Afterwards, the concept of RoboPIV is introduced as a new approach. In a first step, the usability of a selection of commercially available robot arms is analysed. The challenges of pose uncertainty and importance of absolute accuracy are demonstrated through comparative measurements, explaining the individual pros and cons of the analysed systems. Subsequently, the advantage of integrating RoboPIV directly into the existing wind tunnel management system is shown on basis of a typical measurement sequence. In a final step, a practical measurement procedure, including post-processing, is given by using real data and results. Ultimately, the benefits of high automation are demonstrated, leading to a drastic reduction in necessary measurement time compared to non-automated systems, thus massively increasing the efficiency of PIV measurements.}, language = {en} } @article{Wollert2018, author = {Wollert, J{\"o}rg}, title = {Echtzeit-Ethernet - Basis f{\"u}r Industrie 4.0}, series = {Design \& Elektronik}, journal = {Design \& Elektronik}, publisher = {WEKA-Fachmedien}, address = {M{\"u}nchen}, isbn = {0933-8667}, year = {2018}, language = {de} } @article{KunkelGebhardtMpofuetal.2018, author = {Kunkel, Maximilian Hugo and Gebhardt, Andreas and Mpofu, Khumbaulani and Kallweit, Stephan}, title = {Statistical assessment of mechanical properties of selective laser melted specimens of stainless steel}, series = {The International Journal of Advanced Manufacturing Technology}, volume = {98}, journal = {The International Journal of Advanced Manufacturing Technology}, number = {5-8}, publisher = {Springer}, address = {London}, issn = {0268-3768}, doi = {10.1007/s00170-018-2040-8}, pages = {1409 -- 1431}, year = {2018}, abstract = {The rail business is challenged by long product life cycles and a broad spectrum of assembly groups and single parts. When spare part obsolescence occurs, quick solutions are needed. A reproduction of obsolete parts is often connected to long waiting times and minimum lot quantities that need to be purchased and stored. Spare part storage is therefore challenged by growing stocks, bound capital and issues of part ageing. A possible solution could be a virtual storage of spare parts which will be 3D printed through additive manufacturing technologies in case of sudden demand. As mechanical properties of additive manufactured parts are neither guaranteed by machine manufacturers nor by service providers, the utilization of this relatively young technology is impeded and research is required to address these issues. This paper presents an examination of mechanical properties of specimens manufactured from stainless steel through the selective laser melting (SLM) process. The specimens were produced in multiple batches. This paper interrogates the question if the test results follow a normal distribution pattern and if mechanical property predictions can be made. The results will be put opposite existing threshold values provided as the industrial standard. Furthermore, probability predictions will be made in order to examine the potential of the SLM process to maintain state-of-the-art mechanical property requirements.}, language = {en} } @inproceedings{RieperGebhardtStucker2016, author = {Rieper, Harald and Gebhardt, Andreas and Stucker, Brent}, title = {Process parameters for Selective Laser Melting of AgCu7}, series = {DDMC, Fraunhofer Direct Digital Manufacturing Conference, 3}, booktitle = {DDMC, Fraunhofer Direct Digital Manufacturing Conference, 3}, publisher = {Fraunhofer-Verlag}, address = {Stuttgart}, isbn = {978-3-8396-1001-5}, pages = {171 -- 176}, year = {2016}, language = {en} } @inproceedings{BraunChengLaietal.2019, author = {Braun, Sebastian and Cheng, Chi-Tsun and Lai, Chow Yin and Wollert, J{\"o}rg}, title = {Microservice Architecture for Automation - Realization by the example of a model-factory's manufacturing execution system}, series = {Proceedings of the 23rd World Multi-Conference on Systemics, Cybernetics and Informatics: WMSCI 2019}, booktitle = {Proceedings of the 23rd World Multi-Conference on Systemics, Cybernetics and Informatics: WMSCI 2019}, pages = {33 -- 37}, year = {2019}, language = {en} } @article{Thomas2019, author = {Thomas, Axel}, title = {Die Wiederbelebung der Mitarbeiterwohnungsidee bei kommunalen Unternehmen}, series = {VM Verwaltung und Management}, volume = {25}, journal = {VM Verwaltung und Management}, number = {6}, publisher = {Nomos-Verl.-Ges.}, address = {Baden-Baden}, issn = {0947-9856}, doi = {10.5771/0947-9856-2019-6-286}, pages = {286 -- 291}, year = {2019}, language = {de} } @article{WilbringEnning2019, author = {Wilbring, Daniela and Enning, Manfred}, title = {Stromversorgung auf G{\"u}terwagen - Aktuelle Bem{\"u}hungen zur Standardisierung}, series = {ETR - Eisenbahntechnische Rundschau}, volume = {68}, journal = {ETR - Eisenbahntechnische Rundschau}, number = {11}, publisher = {DVV Media Group}, address = {Hamburg}, issn = {0013-2845}, pages = {64 -- 67}, year = {2019}, language = {de} } @book{GebhardtKesslerSchwarz2019, author = {Gebhardt, Andreas and Kessler, Julia and Schwarz, Alexander}, title = {Produktgestaltung f{\"u}r die additive Fertigung}, publisher = {Hanser}, address = {M{\"u}nchen}, isbn = {978-3-446-45285-5}, pages = {XVI, 266 Seiten : Illustrationen, Diagramme}, year = {2019}, language = {de} } @inproceedings{GerhardsSchleserOttenetal.2019, author = {Gerhards, Benjamin and Schleser, Markus and Otten,, Christian and Schwarz, Alexander and Gebhardt, Andreas}, title = {Innovative Laser Beam Joining Technology for Additive Manufactured Parts}, series = {Conference Proceedings 72nd IIW Annual Assembly and International Conference, 7-12 July 2019, Bratislava}, booktitle = {Conference Proceedings 72nd IIW Annual Assembly and International Conference, 7-12 July 2019, Bratislava}, pages = {1 -- 8}, year = {2019}, language = {en} } @inproceedings{GerhardsSchleserOtten2019, author = {Gerhards, Benjamin and Schleser, Markus and Otten, Christian}, title = {Advancements of mobile vacuum laser welding for industrial thick sheet applications}, series = {Conference Proceedings 72nd IIW Annual Assembly and International Conference, 7-12 July 2019, Bratislava}, booktitle = {Conference Proceedings 72nd IIW Annual Assembly and International Conference, 7-12 July 2019, Bratislava}, pages = {1 -- 8}, year = {2019}, language = {en} } @article{WollbrinkMasloZimmeretal.2020, author = {Wollbrink, Moritz and Maslo, Semir and Zimmer, Daniel and Abbas, Karim and Arntz, Kristian and Bergs, Thomas}, title = {Clamping and substrate plate system for continuous additive build-up and post-processing of metal parts}, series = {Procedia CIRP}, volume = {93}, journal = {Procedia CIRP}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2212-8271}, doi = {10.1016/j.procir.2020.04.015}, pages = {108 -- 113}, year = {2020}, abstract = {The manufacturing share of laser powder bed fusion (L-PBF) increases in industrial application, but still many process steps are manually operated. Additionally, it is not possible to achieve tight dimensional tolerances or low surfaces roughness. Hence, a process chain has to be set up to combine additive manufacturing (AM) with further machining technologies. To achieve a continuous workpiece flow as basis for further industrialization of L-PBF, the paper presents a novel substrate system and its application on L-PBF machines and post-processing. The substrate system consists of a zero-point clamping system and a matrix-like interface of contact pins to be substantially connected to the workpiece within the L-PBF process.}, language = {en} } @incollection{FateriGebhardt2020, author = {Fateri, Miranda and Gebhardt, Andreas}, title = {Introduction to Additive Manufacturing}, series = {3D Printing of Optical Components}, booktitle = {3D Printing of Optical Components}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-58960-8}, doi = {10.1007/978-3-030-58960-8_1}, pages = {1 -- 22}, year = {2020}, abstract = {Additive manufacturing (AM) works by creating objects layer by layer in a manner similar to a 2D printer with the "printed" layers stacked on top of each other. The layer-wise manufacturing nature of AM enables fabrication of freeform geometries which cannot be fabricated using conventional manufacturing methods as a one part. Depending on how each layer is created and bonded to the adjacent layers, different AM methods have been developed. In this chapter, the basic terms, common materials, and different methods of AM are described, and their potential applications are discussed.}, language = {en} } @inproceedings{ChavezBermudezWollert2019, author = {Chavez Bermudez, Victor Francisco and Wollert, J{\"o}rg}, title = {Gateway for Automation Controllers and Cloud based Voice Recognition Services}, series = {KommA, 10. Jahreskolloquium Kommunikation in der Automation}, booktitle = {KommA, 10. Jahreskolloquium Kommunikation in der Automation}, publisher = {Institut f{\"u}r Automation und Kommunikation}, address = {Magdeburg}, organization = {KommA, 2019, Jahreskolloquium Kommunikation in der Automation, 10., Lemgo, DE, 2019-11-20 - 2019-11-21}, isbn = {978-3-944722-85-6}, pages = {1 -- 8}, year = {2019}, language = {en} } @article{UlmerGroeningerBraunetal.2020, author = {Ulmer, Jessica and Gr{\"o}ninger, Marc and Braun, Sebastian and Wollert, J{\"o}rg}, title = {AR Arbeitspl{\"a}tze: F{\"u}r hochflexible und skalierbare Produktionsumgebungen}, series = {atp Magazin}, volume = {62}, journal = {atp Magazin}, number = {10}, publisher = {Vulkan-Verlag}, address = {Essen}, issn = {2364-3137}, doi = {10.17560/atp.v62i10.2495}, year = {2020}, abstract = {Trotz fortschreitender Automatisierung bleiben manuelle T{\"a}tigkeiten ein wichtiger Baustein der Fertigung kundenindividueller Produkte. Um die Mitarbeiter(innen) zu unterst{\"u}tzen und um eine effiziente Arbeit zu erm{\"o}glichen, werden zunehmend auf Augmented Reality (AR) basierende Systeme eingesetzt. Die vorgestellte Arbeit konzentriert sich auf die Entwicklung ganzheitlicher AR-Arbeitspl{\"a}tze f{\"u}r den Einsatz in kleinen und mittleren Unternehmen (KMU). Das entwickelte AR- Handarbeitskonzept beinhaltet eine Just-in-time-Darstellung der Arbeitsaufgaben auf Werkst{\"u}cken mit automatisierter Fertigungskontrolle. Als Reaktion auf kurze Produktlebenszyklen und hohe Produktvielfalten sind alle Komponenten auf maximale Flexibilit{\"a}t ausgelegt. Ein Umr{\"u}sten auf neue Produkte kann innerhalb von Minuten erfolgen.}, language = {de} } @incollection{GebhardtHoetter2019, author = {Gebhardt, Andreas and Hoetter, Jan-Steffen}, title = {Rapid Tooling}, series = {CIRP Encyclopedia of Production Engineering}, booktitle = {CIRP Encyclopedia of Production Engineering}, publisher = {Springer}, address = {Berlin, Heidelberg}, isbn = {978-3-662-53120-4}, doi = {10.1007/978-3-662-53120-4}, pages = {39 -- 52}, year = {2019}, language = {en} } @inproceedings{ChavezBermudezWollert2020, author = {Chavez Bermudez, Victor Francisco and Wollert, J{\"o}rg}, title = {Arduino based Framework for Rapid Application Development of a Generic IO-Link interface}, series = {Kommunikation und Bildverarbeitung in der Automation. Ausgew{\"a}hlte Beitr{\"a}ge der Jahreskolloquien KommA und BVAu 2018}, booktitle = {Kommunikation und Bildverarbeitung in der Automation. Ausgew{\"a}hlte Beitr{\"a}ge der Jahreskolloquien KommA und BVAu 2018}, publisher = {Springer Vieweg}, address = {Berlin}, isbn = {978-3-662-59895-5}, doi = {10.1007/978-3-662-59895-5_2}, pages = {21 -- 33}, year = {2020}, abstract = {The implementation of IO-Link in the automation industry has increased over the years. Its main advantage is it offers a digital point-to-point plugand-play interface for any type of device or application. This simplifies the communication between devices and increases productivity with its different features like self-parametrization and maintenance. However, its complete potential is not always used. The aim of this paper is to create an Arduino based framework for the development of generic IO-Link devices and increase its implementation for rapid prototyping. By generating the IO device description file (IODD) from a graphical user interface, and further customizable options for the device application, the end-user can intuitively develop generic IO-Link devices. The peculiarity of this framework relies on its simplicity and abstraction which allows to implement any sensor functionality and virtually connect any type of device to an IO-Link master. This work consists of the general overview of the framework, the technical background of its development and a proof of concept which demonstrates the workflow for its implementation.}, language = {en} } @inproceedings{UlmerBraunChengetal.2020, author = {Ulmer, Jessica and Braun, Sebastian and Cheng, Chi-Tsun and Dowey, Steve and Wollert, J{\"o}rg}, title = {Simulation und Verifikation komplexer Handarbeitsprozesse durch die Kombination von Virtual Reality und Augmented Reality im Single-Piece-Workflow}, series = {Tagungsband: AALE 2020}, booktitle = {Tagungsband: AALE 2020}, isbn = {978-3-8007-5180-8}, pages = {4 Seiten}, year = {2020}, language = {de} } @book{Schmidt2019, author = {Schmidt, Bernd}, title = {Grundlagen der Elektrotechnik und Elektronik f{\"u}r Ingenieure der Schienenfahrzeugtechnik und anderer Fachrichtungen : neu mit neuem SI-System und weiteren Inhalten f{\"u}r Mechantroniker}, edition = {3. vollst{\"a}ndig {\"u}berarbeitete Auflage}, publisher = {B. Schmidt, Fachverlag f{\"u}r Elektro- und Informationstechnik}, address = {Bielefeld}, isbn = {978-3-944131-04-7}, pages = {XXVI, 270 Seiten : Illustrationen, Diagramme}, year = {2019}, language = {de} } @article{WollertBooke2016, author = {Wollert, J{\"o}rg and Booke, Andreas}, title = {IoT von der Stange}, series = {elektronik}, journal = {elektronik}, number = {21 (2016)}, publisher = {WEKA-Fachmedien}, address = {M{\"u}nchen}, pages = {30 -- 37}, year = {2016}, abstract = {Heute sollte am besten jedes Ger{\"a}t in die große Rechnerwolke eingebettet werden. Doch so einfach ist das nicht, denn Cloud ist viel mehr als nur das Internet der Dinge. Als Anwender muss man sich also fragen, welche Dienste man m{\"o}chte und welchem Anbieter man sein Vertrauen schenkt.}, language = {de} } @book{Schmidt2016, author = {Schmidt, Bernd}, title = {Grundlagen der Elektrotechnik und Elektronik f{\"u}r Ingenieure der Schienenfahrzeugtechnik und anderer Fachrichtungen}, edition = {1. Aufl.}, publisher = {B. Schmidt, Fachverlag f{\"u}r Elektro- und Informationstechnik}, address = {Bielefeld}, isbn = {978-3-944131-02-3}, pages = {XXIII, 255 Seiten : Illustrationen}, year = {2016}, language = {de} } @book{Schmidt2017, author = {Schmidt, Bernd}, title = {Grundlagen der Elektrotechnik und Elektronik f{\"u}r Ingenieure der Schienenfahrzeugtechnik und anderer Fachrichtungen : mit 12 Tabellen und 221 Abbildungen ; NEU mit Verst{\"a}ndnisaufgaben und L{\"o}sungsbeispielen}, edition = {2. vollst{\"a}ndig {\"u}berarbeitete Auflage}, publisher = {B. Schmidt, Fachverlag f{\"u}r Elektro- und Informationstechnik}, address = {Bielefeld}, isbn = {978-3-944131-03-0}, pages = {XXV, 307 Seiten : Illustrationen, Diagramme}, year = {2017}, language = {de} } @article{ReisgenSchaeferWilmsetal.2017, author = {Reisgen, Uwe and Sch{\"a}fer, Johannes and Wilms, Konrad and Schleser, Markus}, title = {Aufmischungsarmes, dickschichtiges MSG-Auftragschweißen mit entkoppelter Zweidrahttechnik}, series = {Schweißen und Schneiden}, volume = {69}, journal = {Schweißen und Schneiden}, number = {12}, publisher = {DVS Verlag}, address = {D{\"u}sseldorf}, issn = {0036-7184}, pages = {838 -- 843}, year = {2017}, abstract = {F{\"u}r Auftragschweißaufgaben existiert eine Vielzahl an verfahrenstechnischen Prozessvarianten, die je nach Charakteristik und Anwendungsfall ausgew{\"a}hlt werden. Ein Nachteil der vorwiegend verwendeten Metall- Schutzgasschweißprozesse (MSG) f{\"u}r das Auftragschweißen ist durch die direkte Kopplung von Drahtvorschub zu Energieeintrag gegeben. Die vorgestellte Zweidraht-Prozessvariante kann durch die Ausbildung eines {\"u}bertragenen und eines nicht-{\"u}bertragenen Lichtbogens die elektrische Leistung beider Lichtb{\"o}gen variieren und damit einen direkten Einfluss auf die Prozessgr{\"o}ßen Abschmelzleistung und Aufschmelzgrad nehmen. Im Speziellen besteht {\"u}ber die Entkopplung von Drahtvorschub zu Schweißstromst{\"a}rke die M{\"o}glichkeit eines niederenergetischen Betriebs trotz hoher Drahtvorschubgeschwindigkeit. Damit lassen sich Aufschmelzgrade unter 2\% umsetzen und Abschmelzleistungen bis zu 15 kg/h realisieren.}, language = {de} } @inproceedings{KleineKallweitMichauxetal.2016, author = {Kleine, Harald and Kallweit, Stephan and Michaux, Frank and Havermann, Marc and Olivier, Herbert}, title = {PIV Measurement of Shock Wave Diffraction}, series = {18th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 2016, Lissabon}, booktitle = {18th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 2016, Lissabon}, pages = {1 -- 14}, year = {2016}, language = {en} } @inproceedings{SchleupenEngemannBagherietal.2016, author = {Schleupen, Josef and Engemann, Heiko and Bagheri, Mohsen and Kallweit, Stephan}, title = {The potential of SMART climbing robot combined with a weatherproof cabin for rotor blade maintenance}, series = {17th European Conference on Composite Materials - ECCM, Munich, Germany}, booktitle = {17th European Conference on Composite Materials - ECCM, Munich, Germany}, pages = {1 -- 8}, year = {2016}, language = {en} } @inproceedings{EnningFratscher2017, author = {Enning, Manfred and Fratscher, Ren{\´e}}, title = {Funk-Kommunikation f{\"u}r G{\"u}terwagen: Prinzipien und Anwendungsbeispiel}, series = {IRSA International Railway Symposium Aachen}, booktitle = {IRSA International Railway Symposium Aachen}, pages = {1 -- 16}, year = {2017}, language = {de} } @article{Reichert2017, author = {Reichert, Walter}, title = {Berufseinstieg f{\"u}r Wirtschaftsingenieure - Bachelor oder Master?}, series = {Berufsstart}, journal = {Berufsstart}, year = {2017}, language = {de} } @article{Wollert2017, author = {Wollert, J{\"o}rg}, title = {Echtzeit-Ethernet - Basis f{\"u}r Industrie 4.0}, series = {Design \& Elektronik}, journal = {Design \& Elektronik}, number = {12}, publisher = {WEKA-Fachmedien}, address = {Haar, M{\"u}nchen}, issn = {0933-8667}, pages = {38 -- 41}, year = {2017}, language = {de} } @article{KlockeRichertSube2018, author = {Klocke, Martina and Richert, Vera and Sube, Maike}, title = {Vier Jahre „Guter Studienstart im Ingenieurbereich": Entwicklung und Perspektiven des „Nullten Semesters" in Aachen}, series = {Zeitschrift f{\"u}r Beratung und Studium}, volume = {13}, journal = {Zeitschrift f{\"u}r Beratung und Studium}, number = {1}, publisher = {Universit{\"a}tsverlag Webler}, address = {Bielefeld}, issn = {1860-3068}, pages = {17 -- 22}, year = {2018}, abstract = {Bereits 2015 wurde in der Zeitschrift „Qualit{\"a}t in der Wissenschaft" (QiW) {\"u}ber das Kooperationsprojekt „Guter Studienstart im Ingenieurbereich", das Orientierungssemester von RWTH und FH Aachen, berichtet. In diesem Artikel legen wir den Schwerpunkt auf die Entwicklung des Projekts in den Jahren 2015 bis 2018 und geben eine R{\"u}ckschau sowie einen Ausblick auf die Entwicklungsperspektiven nach dem offiziellen Projektende.}, language = {de} } @article{Thomas2018, author = {Thomas, Axel}, title = {Technologiezentren in der Aachener Region - Retrospektiven und Perspektiven}, series = {VM Verwaltung und Management}, volume = {24}, journal = {VM Verwaltung und Management}, number = {3}, publisher = {Nomos}, address = {Baden-Baden}, issn = {0947-9856}, doi = {10.5771/0947-9856-2018-3-147}, pages = {147 -- 156}, year = {2018}, language = {de} } @article{Thomas2018, author = {Thomas, Axel}, title = {Zielerreichungen der Technologie- und Gr{\"u}nderzentren aus Sicht der kommunalen Finanzwirtschaft - dargestellt am Beispiel der Aachener Region}, series = {Der Gemeindehaushalt}, volume = {119}, journal = {Der Gemeindehaushalt}, number = {7}, publisher = {Kohlhammer}, address = {Stuttgart}, issn = {0340-3645}, pages = {149 -- 155}, year = {2018}, language = {de} } @inproceedings{WiesenEngemannLimpertetal.2018, author = {Wiesen, Patrick and Engemann, Heiko and Limpert, Nicolas and Kallweit, Stephan}, title = {Learning by Doing - Mobile Robotics in the FH Aachen ROS Summer School}, series = {European Robotics Forum 2018, TRROS18 Workshop}, booktitle = {European Robotics Forum 2018, TRROS18 Workshop}, pages = {47 -- 58}, year = {2018}, language = {en} } @incollection{KlockeKatz2017, author = {Klocke, Martina and Katz, Christiane}, title = {Heterogenit{\"a}t von MINT-Studierenden als Herausforderung}, series = {Tagungsband zum 3. Symposium zur Hochschullehre in den MINT-F{\"a}chern}, booktitle = {Tagungsband zum 3. Symposium zur Hochschullehre in den MINT-F{\"a}chern}, publisher = {Technische Hochschule N{\"u}rnberg Georg Simon Ohm}, address = {N{\"u}rnberg}, pages = {31 -- 36}, year = {2017}, language = {de} } @incollection{Klocke2018, author = {Klocke, Martina}, title = {Schulter an Schulter - Zusammenarbeit in einem differenzierten Hochschulsystem}, series = {Lehre und Lehrentwicklung an Fachhochschulen - Festschrift f{\"u}r Prof. Dr. med. W. Huhn}, booktitle = {Lehre und Lehrentwicklung an Fachhochschulen - Festschrift f{\"u}r Prof. Dr. med. W. Huhn}, publisher = {Waxmann}, address = {M{\"u}nster}, isbn = {978-3-8309-3782-1}, pages = {75 -- 80}, year = {2018}, language = {de} } @inproceedings{WiesenSchleser2019, author = {Wiesen, Andreas and Schleser, Markus}, title = {Entwicklung einer Qualit{\"a}tssicherung f{\"u}r das Laserstrahlschweißen im Vakuum mittels Bildverarbeitung}, series = {Große Schweißtechnische Tagung}, booktitle = {Große Schweißtechnische Tagung}, publisher = {DVS-Media}, address = {D{\"u}sseldorf}, isbn = {978-3-96144-066-5}, pages = {1 -- 6}, year = {2019}, language = {de} } @inproceedings{OttenGerhardsSchleseretal.2019, author = {Otten, Christian and Gerhards, Benjamin and Schleser, Markus and Schwarz, A. and Gebhardt, Andreas}, title = {Innovative Laserschweißtechnologie f{\"u}r additiv gefertigte Bauteile}, series = {Große Schweißtechnische Tagung}, booktitle = {Große Schweißtechnische Tagung}, publisher = {DVS-Media}, address = {D{\"u}sseldorf}, isbn = {978-3-96144-066-5}, pages = {150 -- 157}, year = {2019}, language = {de} } @incollection{FiedlerHennMelcher2015, author = {Fiedler, Gerda and Henn, Gudrun and Melcher, Karin}, title = {ANPAK - Ein Anpassungskurs f{\"u}r Studienanf{\"a}nger in den Ingenieurwissenschaften}, series = {Qualifizierung von Studierenden im Student-Life-Cycle. Tagungsband zum Mosbacher Tag der Lehre am 23.10.2014 /}, booktitle = {Qualifizierung von Studierenden im Student-Life-Cycle. Tagungsband zum Mosbacher Tag der Lehre am 23.10.2014 /}, editor = {Morschheuser, Petra}, publisher = {Duale Hochschule Baden-W{\"u}rttemberg (DHBW)}, address = {Mosbach}, isbn = {978-3-943656-02-2}, pages = {90 -- 93}, year = {2015}, language = {de} } @article{CosmaKesslerGebhardtetal.2020, author = {Cosma, Cosmin and Kessler, Julia and Gebhardt, Andreas and Campbell, Ian and Balc, Nicolae}, title = {Improving the Mechanical Strength of Dental Applications and Lattice Structures SLM Processed}, series = {Materials}, volume = {13}, journal = {Materials}, number = {4}, publisher = {MDPI}, address = {Basel}, issn = {1996-1944}, doi = {10.3390/ma13040905}, pages = {1 -- 18}, year = {2020}, abstract = {To manufacture custom medical parts or scaffolds with reduced defects and high mechanical characteristics, new research on optimizing the selective laser melting (SLM) parameters are needed. In this work, a biocompatible powder, 316L stainless steel, is characterized to understand the particle size, distribution, shape and flowability. Examination revealed that the 316L particles are smooth, nearly spherical, their mean diameter is 39.09 μm and just 10\% of them hold a diameter less than 21.18 μm. SLM parameters under consideration include laser power up to 200 W, 250-1500 mm/s scanning speed, 80 μm hatch spacing, 35 μm layer thickness and a preheated platform. The effect of these on processability is evaluated. More than 100 samples are SLM-manufactured with different process parameters. The tensile results show that is possible to raise the ultimate tensile strength up to 840 MPa, adapting the SLM parameters for a stable processability, avoiding the technological defects caused by residual stress. Correlating with other recent studies on SLM technology, the tensile strength is 20\% improved. To validate the SLM parameters and conditions established, complex bioengineering applications such as dental bridges and macro-porous grafts are SLM-processed, demonstrating the potential to manufacture medical products with increased mechanical resistance made of 316L.}, language = {en} } @inproceedings{UlmerBraunChengetal.2021, author = {Ulmer, Jessica and Braun, Sebastian and Cheng, Chi-Tsun and Dowey, Steve and Wollert, J{\"o}rg}, title = {Adapting augmented reality systems to the users' needs using gamification and error solving methods}, series = {Procedia CIRP - 54th CIRP CMS 2021 - Towards Digitalized Manufacturing 4.0}, volume = {104}, booktitle = {Procedia CIRP - 54th CIRP CMS 2021 - Towards Digitalized Manufacturing 4.0}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2212-8271}, doi = {10.1016/j.procir.2021.11.024}, pages = {140 -- 145}, year = {2021}, abstract = {Animations of virtual items in AR support systems are typically predefined and lack interactions with dynamic physical environments. AR applications rarely consider users' preferences and do not provide customized spontaneous support under unknown situations. This research focuses on developing adaptive, error-tolerant AR systems based on directed acyclic graphs and error resolving strategies. Using this approach, users will have more freedom of choice during AR supported work, which leads to more efficient workflows. Error correction methods based on CAD models and predefined process data create individual support possibilities. The framework is implemented in the Industry 4.0 model factory at FH Aachen.}, language = {en} } @book{Feuerriegel2021, author = {Feuerriegel, Uwe}, title = {W{\"a}rme{\"u}bertragung mit EXCEL und VBA: W{\"a}rmetechnische Berechnungen und Simulationen effektiv durchf{\"u}hren und professionell dokumentieren}, publisher = {Springer Vieweg}, address = {Wiesbaden}, isbn = {978-3-658-35905-8}, doi = {10.1007/978-3-658-35906-5}, pages = {XX, 439 Seiten}, year = {2021}, abstract = {Dieses Lehrbuch vermittelt die Grundlagen der W{\"a}rme{\"u}bertragung sowie den Umgang mit EXCEL-VBA von der Erstellung von Makros bis zu benutzerdefinierten Funktionen. Es legt damit eine Basis f{\"u}r die schnelle und professionelle Durchf{\"u}hrung von Berechnungen und Simulationen. Die angeleitete Erstellung von Berechnungsmodulen mit EXCEL und VBA aus allen wichtigen Bereichen der W{\"a}rme{\"u}bertragung bildet den inhaltlichen Schwerpunkt. Dazu z{\"a}hlen die station{\"a}re W{\"a}rmeleitung und der station{\"a}re W{\"a}rmedurchgang, die instation{\"a}re W{\"a}rmeleitung, der W{\"a}rme{\"u}bergang bei freier und erzwungener Konvektion sowie die W{\"a}rmestrahlung und der W{\"a}rme{\"u}bergang beim Kondensieren und Sieden. Soweit sinnvoll und m{\"o}glich werden die Stoffwertekorrelationen und die Berechnungsvorschriften aus dem VDI-W{\"a}rmeatlas verwendet. F{\"u}r ausgew{\"a}hlte Anwendungen werden zudem komplexere Auslegungen und Simulationen von Prozessen der W{\"a}rme{\"u}bertragung sowie von W{\"a}rme{\"u}bertragern erstellt. Die Zielgruppen: Studierende in Bachelor- und Masterstudieng{\"a}ngen, Praktiker im Engineering}, language = {de} } @article{EngemannCoenenDawaretal.2021, author = {Engemann, Heiko and C{\"o}nen, Patrick and Dawar, Harshal and Du, Shengzhi and Kallweit, Stephan}, title = {A robot-assisted large-scale inspection of wind turbine blades in manufacturing using an autonomous mobile manipulator}, series = {Applied Sciences}, volume = {11}, journal = {Applied Sciences}, number = {19}, publisher = {MDPI}, address = {Basel}, issn = {2076-3417}, doi = {10.3390/app11199271}, pages = {1 -- 22}, year = {2021}, abstract = {Wind energy represents the dominant share of renewable energies. The rotor blades of a wind turbine are typically made from composite material, which withstands high forces during rotation. The huge dimensions of the rotor blades complicate the inspection processes in manufacturing. The automation of inspection processes has a great potential to increase the overall productivity and to create a consistent reliable database for each individual rotor blade. The focus of this paper is set on the process of rotor blade inspection automation by utilizing an autonomous mobile manipulator. The main innovations include a novel path planning strategy for zone-based navigation, which enables an intuitive right-hand or left-hand driving behavior in a shared human-robot workspace. In addition, we introduce a new method for surface orthogonal motion planning in connection with large-scale structures. An overall execution strategy controls the navigation and manipulation processes of the long-running inspection task. The implemented concepts are evaluated in simulation and applied in a real-use case including the tip of a rotor blade form.}, language = {en} } @inproceedings{FiedlerGottschlichMuellerMelcher2021, author = {Fiedler, Gerda and Gottschlich-M{\"u}ller, Birgit and Melcher, Karin}, title = {Online-Pr{\"u}fungen mit STACK Aufgaben}, series = {Tagungsband ASIM Workshop STS/GMMS/EDU 2021}, booktitle = {Tagungsband ASIM Workshop STS/GMMS/EDU 2021}, editor = {Liu-Henke, Xiaobo and Durak, Umut}, publisher = {ARGESIM Verlag}, address = {Wien}, isbn = {978-3-901608-69-8}, doi = {10.11128/arep.45}, pages = {173 -- 178}, year = {2021}, abstract = {Wir stellen hier exemplarisch STACK Aufgaben vor, die frei von der Problematik sind, welche sich durch diverse Kommunikationswege und (webbasierte) Computer Algebra Systeme (CAS) ergibt. Daher sind sie insbesondere f{\"u}r eine Open-Book Online Pr{\"u}fung geeignet, da eine faire Pr{\"u}fungssituation gew{\"a}hrleistet werden kann.}, language = {de} } @inproceedings{EvansBraunUlmeretal.2022, author = {Evans, Benjamin and Braun, Sebastian and Ulmer, Jessica and Wollert, J{\"o}rg}, title = {AAS implementations - current problems and solutions}, series = {20th International Conference on Mechatronics - Mechatronika (ME)}, booktitle = {20th International Conference on Mechatronics - Mechatronika (ME)}, publisher = {IEEE}, address = {New York, NY}, isbn = {978-1-6654-1040-3}, doi = {10.1109/ME54704.2022.9982933}, pages = {6 Seiten}, year = {2022}, abstract = {The fourth industrial revolution presents a multitude of challenges for industries, one of which being the increased flexibility required of manufacturing lines as a result of increased consumer demand for individualised products. One solution to tackle this challenge is the digital twin, more specifically the standardised model of a digital twin also known as the asset administration shell. The standardisation of an industry wide communications tool is a critical step in enabling inter-company operations. This paper discusses the current state of asset administration shells, the frameworks used to host them and their problems that need to be addressed. To tackle these issues, we propose an event-based server capable of drastically reducing response times between assets and asset administration shells and a multi-agent system used for the orchestration and deployment of the shells in the field.}, language = {en} } @article{KosterScheidweilerTieves2016, author = {Koster, Arie and Scheidweiler, Robert and Tieves, Martin}, title = {A flow based pruning scheme for enumerative equitable coloring algorithms}, series = {A flow based pruning scheme for enumerative equitable coloring algorithms}, journal = {A flow based pruning scheme for enumerative equitable coloring algorithms}, doi = {10.48550/arXiv.1607.08754}, pages = {1 -- 30}, year = {2016}, abstract = {An equitable graph coloring is a proper vertex coloring of a graph G where the sizes of the color classes differ by at most one. The equitable chromatic number is the smallest number k such that G admits such equitable k-coloring. We focus on enumerative algorithms for the computation of the equitable coloring number and propose a general scheme to derive pruning rules for them: We show how the extendability of a partial coloring into an equitable coloring can be modeled via network flows. Thus, we obtain pruning rules which can be checked via flow algorithms. Computational experiments show that the search tree of enumerative algorithms can be significantly reduced in size by these rules and, in most instances, such naive approach even yields a faster algorithm. Moreover, the stability, i.e., the number of solved instances within a given time limit, is greatly improved. Since the execution of flow algorithms at each node of a search tree is time consuming, we derive arithmetic pruning rules (generalized Hall-conditions) from the network model. Adding these rules to an enumerative algorithm yields an even larger runtime improvement.}, language = {en} } @article{BeckenbachScheidweiler2016, author = {Beckenbach, Isabel and Scheidweiler, Robert}, title = {Perfect ƒ-Matchings and ƒ-Factors in Hypergraphs - A Combinatorial Approach}, series = {Discrete Mathematics}, volume = {240}, journal = {Discrete Mathematics}, number = {10}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2192-7782}, doi = {10.1016/j.disc.2017.05.005}, pages = {2499 -- 2506}, year = {2016}, abstract = {We prove characterizations of the existence of perfect ƒ-matchings in uniform mengerian and perfect hypergraphs. Moreover, we investigate the ƒ-factor problem in balanced hypergraphs. For uniform balanced hypergraphs we prove two existence theorems with purely combinatorial arguments, whereas for non-uniform balanced hypergraphs we show that the ƒ-factor problem is NP-hard.}, language = {en} } @article{ScheidweilerTriesch2016, author = {Scheidweiler, Robert and Triesch, Eberhard}, title = {A note on the duality between matchings and vertex covers in balanced hypergraphs}, series = {Journal of Combinatorial Optimization}, volume = {32}, journal = {Journal of Combinatorial Optimization}, number = {2}, publisher = {Springer}, address = {Berlin}, issn = {1573-2886}, doi = {10.1007/s10878-015-9887-5}, pages = {639 -- 644}, year = {2016}, abstract = {We present a new Min-Max theorem for an optimization problem closely connected to matchings and vertex covers in balanced hypergraphs. The result generalizes Kőnig's Theorem (Berge and Las Vergnas in Ann N Y Acad Sci 175:32-40, 1970; Fulkerson et al. in Math Progr Study 1:120-132, 1974) and Hall's Theorem (Conforti et al. in Combinatorica 16:325-329, 1996) for balanced hypergraphs.}, language = {en} } @article{KilicRaatschenKoerfgenetal.2017, author = {Kilic, S. A. and Raatschen, Hans-J{\"u}rgen and K{\"o}rfgen, B. and Apaydin, N. M. and Astaneh-Asl, A.}, title = {FE Model of the Fatih Sultan Mehmet Suspension Bridge Using Thin Shell Finite Elements}, series = {Arabian Journal for Science and Engineering}, volume = {42}, journal = {Arabian Journal for Science and Engineering}, number = {3}, publisher = {Springer Nature}, issn = {2191-4281}, doi = {10.1007/s13369-016-2316-y}, pages = {1103 -- 1116}, year = {2017}, abstract = {This paper presents the results of an eigenvalue analysis of the Fatih Sultan Mehmet Bridge. A high-resolution finite element model was created directly from the available design documents. All physical properties of the structural components were included in detail, so no calibration to the measured data was necessary. The deck and towers were modeled with shell elements. A nonlinear static analysis was performed before the eigenvalue calculation. The calculated natural frequencies and corresponding mode shapes showed good agreement with the available measured ambient vibration data. The calculation of the effective modal mass showed that nine modes had single contributions higher than 5 \% of the total mass. They were in a frequency range up to 1.2 Hz. The comparison of the results for the torsional modes especially demonstrated the advantage of using thin shell finite elements over the beam modeling approach.}, language = {en} } @inproceedings{EngemannWiesenKallweitetal.2018, author = {Engemann, Heiko and Wiesen, Patrick and Kallweit, Stephan and Deshpande, Harshavardhan and Schleupen, Josef}, title = {Autonomous mobile manipulation using ROS}, series = {Advances in Service and Industrial Robotics}, booktitle = {Advances in Service and Industrial Robotics}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-61276-8}, doi = {10.1007/978-3-319-61276-8_43}, pages = {389 -- 401}, year = {2018}, language = {en} }