TY  - CHAP
A1  - Eichler, Fabian
A1  - Skupin, Marco
A1  - Thurn, Laura
A1  - Kasch, Susanne
A1  - Schmidt, Thomas
T1  - Operating limits for beam melting of glass materials
T2  - Modern Technologies in Manufacturing (MTeM 2019)
N2  - Laser-based Additive Manufacturing (AM) processes for the use of metals out of the powder bed have been investigated profusely and are prevalent in industry. Although there is a broad field of application, Laser Powder Bed Fusion (LPBF), also known as Selective Laser Melting (SLM) of glass is not fully developed yet. The material properties of glass are significantly different from the investigated metallic material for LPBF so far. As such, the process cannot be transferred, and the parameter limits and the process sequence must be redefined for glass. Starting with the characterization of glass powders, a parameter field is initially confined to investigate the process parameter of different glass powder using LPBFprocess. A feasibility study is carried out to process borosilicate glass powder. The effects of process parameters on the dimensional accuracy of fabricated parts out of borosilicate and hints for the post-processing are analysed and presented in this paper.
Y1  - 2019
U6  - https://doi.org/10.1051/matecconf/201929901004
N1  - MATEC Web of Conferences 299; MTeM 2019
VL  - 299
IS  - Article 01004
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Ahmed, Essam
T1  - Optimization of laser welding of DP/TRIP steel sheets using statistical approach
JF  - Optics and laser technology
N2  - Generally, the quality of a weld joint is directly influenced by the welding input parameter settings. Selection of proper process parameters is important to obtain the desired weld bead profile and quality. In this research work, numerical and graphical optimization techniques of the CO2 laser beam welding of dual phase (DP600)/transformation induced plasticity (TRIP700) steel sheets were carried out using response surface methodology (RSM) based on Box–Behnken design. The procedure was established to improve the weld quality, increase the productivity and minimize the total operation cost by considering the welding parameters range of laser power (2–2.2 kW), welding speed (40–50 mm/s) and focus position (−1 to 0 mm). It was found that, RSM can be considered as a powerful tool in experimental welding optimization, even when the experimenter does not have a model for the process. Strong, efficient and low cost weld joints could be achieved using the optimum welding conditions.
Y1  - 2012
U6  - https://doi.org/10.1016/j.optlastec.2011.06.028
SN  - 1879-2545 (E-Journal); 0030-3992 (Print); 0308-4280 (Print)
VL  - 44
IS  - 1
SP  - 255
EP  - 262
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Starke, Günther
A1  - Drews, P.
T1  - Optisch-elektronischer Nahtfuehrungssensor zur Schweissnahtverfolgung
JF  - Technisches Messen tm. 51 (1984), H. 7/8
Y1  - 1984
SN  - 0171-8096
SP  - 270
EP  - 275
ER  - 
TY  - CHAP
A1  - Schürmann, Volker
A1  - Wollert, Jörg
T1  - Ortsbezogene Fernwartungsdienste mit Bluetooth Ranging und Java Micro Edition
T2  - Automation 2008: Lösungen für die Zukunft ; der Automatisierungskongress in Deutschland ; Tagung Baden-Baden, 3. und 4. Juni 2008. (VDI-Berichte ; 2032)
Y1  - 2008
SN  - 978-3-18-092032-0
SP  - 353
EP  - 356
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Großmann, Agnes
A1  - Gabrielli, Roland Antonius
A1  - Herdrich, Georg
A1  - Fasoulas, Stefanos
A1  - Schnauffer, Peter
A1  - Middendorf, Peter
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
T1  - Overview of the MultiRob 3D Lunar Industrial Development Project
T2  - Conference Contribution for the 30th ISTS, Kobe, Japan, 04.07.-10.07.2015
Y1  - 2015
ER  - 
TY  - CHAP
A1  - Chudoba, Rostislav
A1  - Konrad, Martin
A1  - Schleser, Markus
A1  - Meskouris, Konstantin
A1  - Reisgen, Uwe
ED  - Curbach, Manfred
T1  - Parametric study of tensile response of TRC specimens reinforced with epoxy-penetrated multi-filament yarns
T2  - Textilbeton - Theorie und Praxis : Tagungsband zum 4. Kolloquium zu textilbewehrten Tragwerken (CTRS4) und zur 1. Anwendertagung, Dresden, 3.6.2009 - 5.6.2009
Y1  - 2009
SN  - 978-3-86780-122-5
SP  - 87
EP  - 98
PB  - Techn. Univ.
CY  - Dresden
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Dues, M.
A1  - Siekmann, H.
T1  - Particle-Image-Velocimetry (PIV) in rotierenden Maschinen / Dues, M. ; Kallweit, S. ; Siekmann, H.
JF  - Lasermethoden in der Strömungsmesstechnik, 3. Fachtagung der Deutschen Gesellschaft für Laser-Anemometrie (GALA), Bremen, DE, 5.-7. Sep, 1994
Y1  - 1994
SN  - 3-8265-0162-4
N1  - Lasermethoden in der Strömungsmesstechnik, Fachtagung, 3
SP  - 19.1
EP  - 19-5
PB  - Shaker
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Starke, Günther
T1  - PC-gestützte Programmierung einer Orbitalschweißanlage
JF  - Qualitätsorientierte Schweißtechnik als Wettbewerbsfaktor, DVS-Berichte. 196 (1999)
Y1  - 1999
SN  - 0418-9639
N1  - Report
SP  - 65
EP  - 68
ER  - 
TY  - JOUR
A1  - Beckenbach, Isabel
A1  - Scheidweiler, Robert
T1  - Perfect ƒ-Matchings and ƒ-Factors in Hypergraphs - A Combinatorial Approach
JF  - Discrete Mathematics
N2  - 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.
Y1  - 2016
U6  - https://doi.org/10.1016/j.disc.2017.05.005
SN  - 2192-7782
N1  - Als Volltext auch bei ZIB (Zuse Institute Berlin)
VL  - 240
IS  - 10
SP  - 2499
EP  - 2506
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Braun, Sebastian
A1  - Cheng, Chi-Tsun
A1  - Dowey, Steve
A1  - Wollert, Jörg
T1  - Performance evaluation of skill-based order-assignment in production environments with multi-agent systems
JF  - IEEE Journal of Emerging and Selected Topics in Industrial Electronics
N2  - The fourth industrial revolution introduces disruptive technologies to production environments. One of these technologies are multi-agent systems (MASs), where agents virtualize machines. However, the agent's actual performances in production environments can hardly be estimated as most research has been focusing on isolated projects and specific scenarios. We address this gap by implementing a highly connected and configurable reference model with quantifiable key performance indicators (KPIs) for production scheduling and routing in single-piece workflows. Furthermore, we propose an algorithm to optimize the search of extrema in highly connected distributed systems. The benefits, limits, and drawbacks of MASs and their performances are evaluated extensively by event-based simulations against the introduced model, which acts as a benchmark. Even though the performance of the proposed MAS is, on average, slightly lower than the reference system, the increased flexibility allows it to find new solutions and deliver improved factory-planning outcomes. Our MAS shows an emerging behavior by using flexible production techniques to correct errors and compensate for bottlenecks. This increased flexibility offers substantial improvement potential. The general model in this paper allows the transfer of the results to estimate real systems or other models.
KW  - cyber-physical production systems
KW  - event-based simulation
KW  - multi-agent systems
KW  - digital factory
KW  - industrial agents
Y1  - 2021
U6  - https://doi.org/10.1109/JESTIE.2021.3108524
SN  - 2687-9735
IS  - Early Access
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Wollert, Jörg
A1  - Rau, S.
T1  - Performance von embedded WLAN-Systemen bei koexistierenden Netzwerken
T2  - KOMMA 2012 : Kommunikation in der Automation : 3. Jahreskolloquium Kommunikation in der Automation : Lemgo, 14.11.2012 / Jürgen Jasperneite ... (Hrsg.)
Y1  - 2012
SN  - 978-3-9814062-2-1
PB  - Inst. für Industrielle Informationstechnik
CY  - Lemgo
ER  - 
TY  - CHAP
A1  - Buda, Aurel
A1  - Schneider, Ulf
A1  - Wollert, Jörg
T1  - Performanceanalyse von Frequenzdiversität in IEEE 802.15.4 Netzwerken
T2  - Wireless Technologies : 11. Kongress, 29. - 30. September 2009, Stuttgart; von der Technologie zur Anwendung / Jörg F. Wollert (Hrsg.) (Fortschritt-Berichte VDI : Reihe 10, Informatik, Kommunikation ; 800)
Y1  - 2009
SN  - 978-3-18-380010-0
SP  - 29
EP  - 38
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Wollert, Jörg
T1  - Performanceanforderungen von Funkstrecken in der Prozess- und Fertigungsautomation
T2  - Automation 2008: Lösungen für die Zukunft ; der Automatisierungskongress in Deutschland ; Tagung Baden-Baden, 3. und 4. Juni 2008. (VDI-Berichte ; 2032)
Y1  - 2008
SN  - 978-3-18-092032-0
SP  - 247
EP  - 248
PB  - VDI-Verl.
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Schimpf, Axel
T1  - Photogrammetric Particle Image Velocimetry / Schimpf, Axel ; Kallweit, Stephan
JF  - Particle image velocimetry : recent improvements; proceedings of the Europiv 2 Workshop held in Zaragoza, Spain, March 31 - April 1, 2003 / edited by M. Stanislas ...
Y1  - 2003
SN  - 3-540-21423-2
SP  - 295
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Korculanin, O.
A1  - Fröhlig, F.
A1  - Gabi, M.
A1  - Mattern, P.
T1  - Photogrammetrische Rekonstruktion von Partikelpositionen mittels Rückprojektion für 3D-PIV
JF  - Lasermethoden in der Strömungsmesstechnik : 19. Fachtagung, 6. - 8. September 2011, Ilmenau ; [Tagungsband enthält ... Beiträge, die anlässlich der 19. Fachtagaung "Lasermethoden in der Strömungsmesstechnik" ... vorgetragen und diskutiert wurden] / veranst. von der Deutschen Gesellschaft für Laser-Anemometrie GALA e.V. Hrsg. A. Thess...
Y1  - 2011
SN  - 978-3-9805613-7-2
N1  - Fachtagung Lasermethoden in der Strömungsmesstechnik <19, 2011, Ilmenau> ; Deutsche Gesellschaft für Laser-Anemometrie
SP  - 28/1
EP  - 28/6
PB  - Dt. Ges. für Laser-AnemometrieGALA e. V.
CY  - Karlsruhe
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Willert, Chris
A1  - Dues, Michael
A1  - Müller, Ulrich
T1  - PIV for Volume Flow Metering / Kallweit, Stephan ; Willert, Chris ; Dues, Michael ; Müller, Ulrich ; Lederer, Thomas
Y1  - 2008
N1  - 14th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 2008-07-07 - 2008-07-10, Lisbon (Portugal)
SP  - 6 S.
ER  - 
TY  - CHAP
A1  - Kleine, Harald
A1  - Kallweit, Stephan
A1  - Michaux, Frank
A1  - Havermann, Marc
A1  - Olivier, Herbert
T1  - PIV Measurement of Shock Wave Diffraction
T2  - 18th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 2016, Lissabon
Y1  - 2016
SP  - 1
EP  - 14
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Kaminsky, Radoslav
A1  - Rossi, Massimiliano
A1  - Morbiducci, Umberto
T1  - PIV Measurements of Flows in Artificial Heart Valves / Kaminsky, Radoslav ; Kallweit, Stephan ; Rossi, Massimiliano ; Morbiducci, Umberto ; Scalise, Lorenzo
JF  - Particle Image Velocimetry - New Developments and Recent Applications
Y1  - 2008
SN  - 978-3-540-73528-1
N1  - Topics in Applied Physics
SP  - 55
EP  - 72
ER  - 
TY  - JOUR
A1  - Kallweit, Stephan
A1  - Kaminsky, R.
A1  - Rossi, M.
A1  - Scalise, L.
T1  - PIV Measurements with high temporal Resolution behind Artificial  Heart Valves  / Kaminsky, R. ; Rossi, M. ; Scalise, L. ; Kallweit, S. ; Verdonck, P.
JF  - Proceedings of the 6th International Symposium on Particle Image Velocimetry
Y1  - 2005
N1  - link zum abstract
PB  - Caltech
CY  - Pasadena, CA
ER  - 
TY  - JOUR
A1  - Enning, Manfred
A1  - Hild, Oliver
A1  - Schloßer, Axel
A1  - Fieweger, K.
T1  - PKW Dieselmotor mit Abgasturboaufladung, variabler Turbinengeometrie, Abgasrückführung / Hild, Oliver ; Schloßer, Axel ; Fieweger, K.; Krüger, M. ; Enning, Manfred ; Deutsch, G.
JF  - Abgasrückführung : Vorhaben Nr. 124 ; Untersuchungen zur Verminderung der emissionschädlicher Abgaskomponenten durch Abgasrückführung bei schnellaufenden Dieselmotoren unter Einschluß der Abgasturboaufladung / Forschungsvereinigung Verbrennungskraftmaschinen.
Y1  - 1998
N1  - Forschungsberichte Verbrennungskraftmaschinen ; R 499
SP  - 21
EP  - 39
PB  - FVV
CY  - Frankfurt/M.
ER  -