TY  - BOOK
A1  - Fiedler, Jörg
A1  - Wollert, Jörg
T1  - C für die Automatisierungspraxis : Grundlagen, Algorithmen, Beispiele
Y1  - 1993
SN  - 3-18-401320-0
PB  - Düsseldorf
CY  - VDI-Verl.
ER  - 
TY  - JOUR
A1  - Franko, Josef
A1  - Du, Shengzhi
A1  - Kallweit, Stephan
A1  - Duelberg, Enno Sebastian
A1  - Engemann, Heiko
T1  - Design of a Multi-Robot System for Wind Turbine Maintenance
JF  - Energies
N2  - The maintenance of wind turbines is of growing importance considering the transition to renewable energy. This paper presents a multi-robot-approach for automated wind turbine maintenance including a novel climbing robot. Currently, wind turbine maintenance remains a manual task, which is monotonous, dangerous, and also physically demanding due to the large scale of wind turbines. Technical climbers are required to work at significant heights, even in bad weather conditions. Furthermore, a skilled labor force with sufficient knowledge in repairing fiber composite material is rare. Autonomous mobile systems enable the digitization of the maintenance process. They can be designed for weather-independent operations. This work contributes to the development and experimental validation of a maintenance system consisting of multiple robotic platforms for a variety of tasks, such as wind turbine tower and rotor blade service. In this work, multicopters with vision and LiDAR sensors for global inspection are used to guide slower climbing robots. Light-weight magnetic climbers with surface contact were used to analyze structure parts with non-destructive inspection methods and to locally repair smaller defects. Localization was enabled by adapting odometry for conical-shaped surfaces considering additional navigation sensors. Magnets were suitable for steel towers to clamp onto the surface. A friction-based climbing ring robot (SMART— Scanning, Monitoring, Analyzing, Repair and Transportation) completed the set-up for higher payload. The maintenance period could be extended by using weather-proofed maintenance robots. The multi-robot-system was running the Robot Operating System (ROS). Additionally, first steps towards machine learning would enable maintenance staff to use pattern classification for fault diagnosis in order to operate safely from the ground in the future.
Y1  - 2020
U6  - http://dx.doi.org/10.3390/en13102552
SN  - 1996-1073
VL  - 13
IS  - 10
SP  - Article 2552
PB  - MDPI
CY  - Basel
ER  - 
TY  - CHAP
A1  - Franzen, Julian
A1  - Stecken, Jannis
A1  - Pfaff, Raphael
A1  - Kuhlenkötter, Bernd
T1  - Using the Digital Shadow for a Prescriptive Optimization of Maintenance and Operation : The Locomotive in the Context of the Cyber-Physical System
T2  - Advances in Production, Logistics and Traffic
N2  - In competition with other modes of transport, rail freight transport is looking for solutions to become more attractive. Short-term success can be achieved through the data-driven optimization of operations and maintenance as well as the application of novel strategies such as prescriptive maintenance. After introducing the concept of prescriptive maintenance, this paper aims to prove that vehicle-focused applications of this approach indeed have the potential to increase attractiveness. However, even greater advantages can be activated if data from the horizontal network of the vehicle is available. Drawing on the state of the art in research and technology in the field of cyber-physical systems (CPS) as well as digital twins and shadows, our work serves to design a system of systems for the horizontal interconnection of a rail vehicle and to conceptualize a draft for a digital twin of a locomotive.
Y1  - 2019
SN  - 978-3-030-13535-5
U6  - http://dx.doi.org/10.1007/978-3-030-13535-5_19
SP  - 265
EP  - 276
PB  - Springer
CY  - Cham
ER  - 
TY  - JOUR
A1  - Franzen, Julius
A1  - Pinders, Erik
A1  - Pfaff, Raphael
A1  - Enning, Manfred
T1  - RailCrowd’s virtual fleets: Make most of your asset data
JF  - Deine Bahn
N2  - For smaller railway operators or those with a diverse fleet, it can be difficult to collect sufficient data to improve maintenance programs. At the same time, new rules such as entity in charge of maintenance – ECM – regulations impose an additional workload by requiring a dedicated maintenance management system and specific reports. The RailCrowd platform sets out to facilitate compliance with ECM and similar regulations while at the same time pooling anonymised fleet data across operators to form virtual fleets, providing greater data insights.
Y1  - 2018
SN  - 0948-7263
IS  - 9
SP  - 11
EP  - 13
PB  - Bahn-Fachverlag
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - The calculation of component activities of binary metallic melts from their gas solubilities
JF  - Zeitschrift für Metallkunde
Y1  - 1985
SN  - 0044-3093
VL  - 76
IS  - 2
SP  - 135
EP  - 137
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - Thermodynamic relations between component activities and gas solubilities in binary metallic systems
JF  - Berichte der Bunsengesellschaft für physikalische Chemie
Y1  - 1985
SN  - 0940-483X
SN  - 0005-9021
VL  - 89
IS  - 2
SP  - 130
EP  - 134
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - The application of a quadi-chemical lattice model to binary metallic solvents containing oxygen in higher concentrations
JF  - Zeitschrift für Metallkunde
Y1  - 1983
SN  - 0044-3093
VL  - 74
IS  - 10
SP  - 665
EP  - 666
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - Über die Voraussetzungen der Wasserstofflöslichkeit in binären Eisenschmelzen
JF  - Archiv für das Eisenhüttenwesen : Fachberichte
Y1  - 1984
SN  - 0003-8962
SN  - 1611-3683
VL  - 55
IS  - 2
SP  - 45
EP  - 48
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - Die Vorausbestimmung der Stickstofflöslichkeit in binären Eisenschmelzen
JF  - Archiv für das Eisenhüttenwesen : Fachberichte
Y1  - 1984
SN  - 0003-8962
SN  - 1611-3683
VL  - 55
IS  - 8
SP  - 365
EP  - 367
ER  - 
TY  - JOUR
A1  - Frohberg, Martin G.
A1  - Anik, Sabri
T1  - Untersuchungen zum Lösungsverhalten von Sauerstoff in Metallschmelzen
JF  - Neue Hütte : metallurgisch-metallkundliche Fachzeitschrift für Forschung und Praxis
Y1  - 1986
SN  - 0028-3207
VL  - 31
IS  - 7
SP  - 255
EP  - 258
ER  -