@article{FrankoDuKallweitetal.2020,
  author    = {Franko, Josef and Du, Shengzhi and Kallweit, Stephan and Duelberg, Enno Sebastian and Engemann, Heiko},
  title     = {Design of a Multi-Robot System for Wind Turbine Maintenance},
  series = {Energies},
  volume    = {13},
  journal   = {Energies},
  number    = {10},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {1996-1073},
  doi       = {10.3390/en13102552},
  pages     = {Article 2552},
  year      = {2020},
  abstract  = {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.},
  language  = {en}
}
@article{KunkelGebhardtMpofuetal.2019,
  author    = {Kunkel, Maximilian Hugo and Gebhardt, Andreas and Mpofu, Khumbulani and Kallweit, Stephan},
  title     = {Quality assurance in metal powder bed fusion via deep-learning-based image classification},
  series = {Rapid Prototyping Journal},
  volume    = {26},
  journal   = {Rapid Prototyping Journal},
  number    = {2},
  issn      = {1355-2546},
  doi       = {10.1108/RPJ-03-2019-0066},
  pages     = {259 -- 266},
  year      = {2019},
  language  = {en}
}
@article{EngemannDuKallweitetal.2020,
  author    = {Engemann, Heiko and Du, Shengzhi and Kallweit, Stephan and C{\"o}nen, Patrick and Dawar, Harshal},
  title     = {OMNIVIL - an autonomous mobile manipulator for flexible production},
  series = {Sensors},
  volume    = {20},
  journal   = {Sensors},
  number    = {24, art. no. 7249},
  publisher = {MDPI},
  address   = {Basel},
  isbn      = {1424-8220},
  doi       = {10.3390/s20247249},
  pages     = {1 -- 30},
  year      = {2020},
  language  = {en}
}
@article{PancContiuBocanetetal.2019,
  author    = {Panc, Nicolae and Contiu, Glad and Bocanet, Vlad and Thurn, Laura and Sabau, Emilia},
  title     = {The influence of cutting technology on surface wear hardness},
  series = {Academic Journal of Manufacturing Engineering},
  volume    = {17},
  journal   = {Academic Journal of Manufacturing Engineering},
  number    = {3},
  issn      = {1583-7904},
  pages     = {205 -- 210},
  year      = {2019},
  language  = {en}
}
@article{AnikFrohberg1987,
  author    = {Anik, Sabri and Frohberg, Martin G.},
  title     = {Thermodynamics and solubility of oxygen in liquid bismuth-lead and bismuth-antimony alloys},
  series = {Berichte der Bunsengesellschaft f{\"u}r physikalische Chemie},
  volume    = {91},
  journal   = {Berichte der Bunsengesellschaft f{\"u}r physikalische Chemie},
  number    = {7},
  issn      = {0940-483X},
  pages     = {790 -- 794},
  year      = {1987},
  language  = {en}
}
@article{FrohbergAnik1983,
  author    = {Frohberg, Martin G. and Anik, Sabri},
  title     = {The application of a quadi-chemical lattice model to binary metallic solvents containing oxygen in higher concentrations},
  series = {Zeitschrift f{\"u}r Metallkunde},
  volume    = {74},
  journal   = {Zeitschrift f{\"u}r Metallkunde},
  number    = {10},
  issn      = {0044-3093},
  pages     = {665 -- 666},
  year      = {1983},
  language  = {en}
}
@article{FrohbergAnik1985,
  author    = {Frohberg, Martin G. and Anik, Sabri},
  title     = {The calculation of component activities of binary metallic melts from their gas solubilities},
  series = {Zeitschrift f{\"u}r Metallkunde},
  volume    = {76},
  journal   = {Zeitschrift f{\"u}r Metallkunde},
  number    = {2},
  issn      = {0044-3093},
  pages     = {135 -- 137},
  year      = {1985},
  language  = {en}
}
@article{AnikFrohberg1984,
  author    = {Anik, Sabri and Frohberg, Martin G.},
  title     = {Thermodynamics and solubility of oxygen in liquid copper-lead alloys at 1200°C from E.M.F. measurements},
  series = {Berichte der Bunsengesellschaft f{\"u}r physikalische Chemie},
  volume    = {88},
  journal   = {Berichte der Bunsengesellschaft f{\"u}r physikalische Chemie},
  number    = {8},
  issn      = {0940-483X},
  pages     = {707 -- 710},
  year      = {1984},
  language  = {en}
}
@article{AnikFrohbergKapoor1983,
  author    = {Anik, Sabri and Frohberg, Martin G. and Kapoor, Madan Lal},
  title     = {Experiments and theoretical considerations on the solution of oxygen in binary metal alloys},
  series = {Berichte der Bunsengesellschaft f{\"u}r physikalische Chemie},
  volume    = {87},
  journal   = {Berichte der Bunsengesellschaft f{\"u}r physikalische Chemie},
  number    = {12},
  issn      = {0005-9021},
  pages     = {1201 -- 1204},
  year      = {1983},
  language  = {en}
}
@article{EnningZambouAbel2005,
  author    = {Enning, Manfred and Zambou, Nathan and Abel, Dirk},
  title     = {Longitudinal Control of Following Vehicles within Platoon : A Model-Based Predictive Approach / Zambou, N. ; Enning, M. ; Abel, D.},
  series = {Advances in automotive control 2004 : a proceedings volume from the IFAC symposium, Salerno, Italy, 19 - 23 April 2004 / ed. C. Pianese},
  journal   = {Advances in automotive control 2004 : a proceedings volume from the IFAC symposium, Salerno, Italy, 19 - 23 April 2004 / ed. C. Pianese},
  publisher = {Elsevier},
  address   = {Oxford},
  isbn      = {0080442501},
  pages     = {733 -- 738},
  year      = {2005},
  language  = {en}
}