TY - JOUR A1 - Michaux, F. A1 - Mattern, P. A1 - Kallweit, Stephan T1 - RoboPIV: how robotics enable PIV on a large industrial scale JF - Measurement Science and Technology N2 - 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. Y1 - 2018 U6 - https://doi.org/10.1088/1361-6501/aab5c1 SN - 1361-6501 N1 - Special Section on the 12th International Symposium on Particle Image Velocimetry (PIV 2017) VL - 29 IS - 7 SP - 074009 PB - IOP CY - Bristol ER - TY - JOUR A1 - Mukherjee, Krishnendu A1 - Prahl, Ulrich A1 - Bleck, Wolfgang A1 - Reisgen, Uwe A1 - Schleser, Markus A1 - Abdurakhmanov, Aydemir T1 - Characterization and modelling techniques for gas metal arc welding of DP 600 sheet steels JF - Materialwissenschaft und Werkstofftechnik N2 - The objectives of the present work are to characterize the Gas Metal Arc Welding process of DP 600 sheet steel and to summarize the modelling techniques. The time-temperature evolution during the welding cycle was measured experimentally and modelled with the softwaretool SimWeld. To model the phase transformations during the welding cycle dilatometer tests were done to quantify the parameters for phase field modelling by MICRESS®. The important input parameters are interface mobility, nucleation density, etc. A contribution was made to include austenite to bainite transformation in MICRESS®. This is useful to predict the microstructure in the fast cooling segments. The phase transformation model is capable to predict the microstructure along the heating and cooling cycles of welding. Tensile tests have shown the evidence of failure at the heat affected zone, which has the ferrite-tempered martensite microstructure. Y1 - 2010 U6 - https://doi.org/10.1002/mawe.201000692 SN - 1521-4052 VL - 41 IS - 11 SP - 972 EP - 983 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Mukherjee, Krishnendu A1 - Ramazani, Ali A1 - Yang, Li A1 - Prahl, Ulrich A1 - Bleck, Wolfgang A1 - Reisgen, Uwe A1 - Schleser, Markus A1 - Abdurakhmanov, Aydemir T1 - Characterization of gas metal arc welded hot rolled DP600 steel JF - Steel research international Y1 - 2011 SN - 1869-344X (E-Book); 1611-3683 (Print) VL - Vol. 82 IS - Iss. 12 SP - 1408 EP - 1416 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Panc, Nicolae A1 - Contiu, Glad A1 - Bocanet, Vlad A1 - Thurn, Laura A1 - Sabau, Emilia T1 - The influence of cutting technology on surface wear hardness JF - Academic Journal of Manufacturing Engineering Y1 - 2019 SN - 1583-7904 VL - 17 IS - 3 SP - 205 EP - 210 ER - TY - JOUR A1 - Peeken, Heinz A1 - Abdel-Latif, Lotfie Ahmed A1 - Benner, Joachim T1 - Einfluss der Ölverschäumung auf Axiallager mit Kreis- und Michell-Segmenten JF - VDI-Z : Zeitschrift für integrierte Produktion Y1 - 1985 SN - 0042-1766 VL - 127 IS - 5 SP - 145 EP - 151 PB - Springer-VDI-Verl CY - Düsseldorf ER - TY - JOUR A1 - Peeken, Heinz A1 - Benner, Joachim A1 - Platt, Werner T1 - Ausfallkriterien elastomerbestückter Wellenkupplungen JF - Antriebstechnik : Konstruktion, Entwicklung und Anwendung von Antrieben und Steuerungen ; Organ der Forschungsvereinigung Antriebstechnik e.V. Y1 - 1989 SN - 0341-2652 VL - 28 IS - 11 SP - 85 EP - 88 PB - Vereinigte Fachverl. CY - Mainz ER - TY - JOUR A1 - Pfaff, Raphael T1 - Braking distance prediction for vehicle consist in low-speed on-sight operation: a Monte Carlo approach JF - Railway Engineering Science N2 - The first and last mile of a railway journey, in both freight and transit applications, constitutes a high effort and is either non-productive (e.g. in the case of depot operations) or highly inefficient (e.g. in industrial railways). These parts are typically managed on-sight, i.e. with no signalling and train protection systems ensuring the freedom of movement. This is possible due to the rather short braking distances of individual vehicles and shunting consists. The present article analyses the braking behaviour of such shunting units. For this purpose, a dedicated model is developed. It is calibrated on published results of brake tests and validated against a high-definition model for low-speed applications. Based on this model, multiple simulations are executed to obtain a Monte Carlo simulation of the resulting braking distances. Based on the distribution properties and established safety levels, the risk of exceeding certain braking distances is evaluated and maximum braking distances are derived. Together with certain parameters of the system, these can serve in the design and safety assessment of driver assistance systems and automation of these processes. KW - Freight rail KW - Shunting KW - Braking curves KW - Brake set-up KW - Driver assistance system Y1 - 2023 U6 - https://doi.org/10.1007/s40534-023-00303-7 SN - 2662-4753 (eISSN) SN - 2662-4745 (Print) VL - 31 IS - 2 SP - 135 EP - 144 PB - SpringerOpen ER - TY - JOUR A1 - Pfaff, Raphael T1 - Einsatz von offenen Onlinekursen in der Eisenbahnlehre JF - Deine Bahn N2 - Eigene positive Erfahrungen mit Onlinekursen sowie die geringen Studierendenzahlen in der Präsenzlehre gaben den Anstoß zu einem Experiment mit einem offenen Onlinekurs auf der Plattform Udemy. Die Erfahrungen sowohl bei der Erstellung und als auch im Lehrbetrieb waren positiv und führten zu einer neuen Beschäftigung mit Inhalten und Lernenden, getrieben durch die Anforderungen der Lernplattform. Y1 - 2017 SN - 0948-7263 IS - 1 SP - 12 EP - 16 PB - Bahn-Fachverlag CY - Berlin ER - TY - JOUR A1 - Pfaff, Raphael T1 - Apps für den Güterwagen? Wie der Güterwagen 4.0 die effiziente Integration der Güterbahn in ERTMS ermöglicht JF - Ingenieurspiegel Y1 - 2017 IS - 2 SP - 1 EP - 2 ER - TY - JOUR A1 - Pfaff, Raphael T1 - Praxisnahe Ausbildung im Fach Schienenfahrzeugtechnik JF - Deine Bahn Y1 - 2015 SN - 0172-4479 IS - 8 SP - 52 EP - 55 PB - Eisenbahn-Fachverlag CY - Mainz ER - TY - JOUR A1 - Pfaff, Raphael A1 - Burnham, Keith J. T1 - On abstraction and interpretability: a behavioural perspective JF - Systems Science Y1 - 2009 SN - 0137-1223 VL - Vol. 35 IS - Iss. 2 SP - 19 EP - 26 ER - TY - JOUR A1 - Pfaff, Raphael A1 - Enning, Manfred T1 - Die nachhaltige Alternative zum autonomen Lastwagen JF - Deine Bahn Y1 - 2017 IS - 10 SP - 22 EP - 26 ER - TY - JOUR A1 - Pfaff, Raphael A1 - Enning, Manfred T1 - Güterwagen 4.0 - Der Güterwagen für das Internet der Dinge. Teil 2: Ausgewählte technische Aspekte und Prozesse JF - ETR - Eisenbahntechnische Rundschau Y1 - 2017 SN - 0013-2845 VL - 66 IS - 5 SP - 74 EP - 77 PB - DVV Media Group CY - Hamburg ER - TY - JOUR A1 - Pfaff, Raphael A1 - Schmidt, Bernd T1 - Daten in der Cloud - und dann? JF - Deine Bahn N2 - Schienenverkehrssysteme stehen in zunehmendem Wettbewerb, sowohl untereinander als auch mit anderen Verkehrsträgern. Als wichtiger Aspekt zur Steigerung der Kosteneffizienz wird die Digitalisierung des Betriebs und der Fahrzeuge betrachtet. Über eine Prognose der Ausfallwahrscheinlichkeit bzw. Restlebensdauer von Subsystemen können mittels Digitalisierung die Instandhaltungskosten gesenkt werden. Die geringen Fehlerraten im System Bahn machen die Nutzung besonderer Simulationstechniken notwendig. In diesem Beitrag wird gezeigt, wie sich die Subsystemverfügbarkeit aus den beobachteten Fehlerraten der Teilfunktionen vorhersagen lässt. Y1 - 2016 SN - 0948-7263 IS - 6 SP - 50 EP - 55 PB - Bahn-Fachverlag CY - Berlin ER - TY - JOUR A1 - Pfaff, Raphael A1 - Schmidt, Bernd A1 - Pinders, Udo T1 - Energieeffizienz steigern durch Rekuperationseinrichtungen JF - Deine Bahn Y1 - 2015 SN - 0172-4479 IS - 5 SP - 50 EP - 53 PB - Eisenbahn-Fachverlag CY - Mainz ER - TY - JOUR A1 - Pfeiffer, Johann T1 - Gute Chancen im Maschinenbau JF - Aachener Nachrichten / Aachener Zeitung : Sonderbeil. (2002) Y1 - 2002 PB - - ER - TY - JOUR A1 - Pfeiffer, Johann T1 - Gute Chancen im Maschinenbau JF - Rheinische Post : Sonderbeil. (2002) Y1 - 2002 ER - TY - JOUR A1 - Pfeiffer, Johann T1 - Lernfeld 'Prozeßkette der Freiformflächenherstellung' : [Online-Ressource] / ... in Zus.-Arb. mit Johann Pfeiffer JF - NUMAS - Ein Lehr- und Lernsystem zur Numerischen Mathematik und Statistik : [Online-Ressource] / Projektleitung: Gisela Engeln Müllges Y1 - 2003 N1 - Die Online-Lerneinheit ist erst nach Registrierung im Lernsystem (http://www.numas.de) einsehbar. Stand der Aktualisierung von NUMAS®: 21.05.2004. PB - NUMAS.de CY - Aachen ER - TY - JOUR A1 - Pfeiffer, Johann T1 - Chancen im Maschinenbau JF - Fachblatt : Journal der Fachhochschule Aachen . 2002 (2002), H. 1 Y1 - 2002 SP - 2 PB - - ER - TY - JOUR A1 - Pfeiffer, Johann T1 - Genauigkeit und Qualität von Freiformflächen / Projektleiter: Joachim Gauchel JF - Forschungsbericht 2004 / Hrsg.: Der Rektor der Fachhochschule Aachen Y1 - 2004 N1 - Kapitel 4.8: Projekte des Fachbereichs Maschinenbau und Mechatronik SP - 180 PB - Fachhochsch. CY - Aachen ER -