@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{EnningJenayehMuelleretal.1997,
  author    = {Enning, Manfred and Jenayeh, I. and M{\"u}ller, C. and Rake, Heinrich},
  title     = {Development and realization of a manipulator for automatic decoupling of freight cars in marshalling yards / Jenayeh, I. ; M{\"u}ller, C. ; Enning, Manfred ; Rake, Heinrich ; Peter, J.},
  year      = {1997},
  language  = {en}
}
@article{StarkeDrews1985,
  author    = {Starke, G{\"u}nther and Drews, P.},
  title     = {Development approaches for advanced control in automated arc welding},
  pages     = {115 -- 124},
  year      = {1985},
  language  = {en}
}
@article{Kaemper1996,
  author    = {K{\"a}mper, Klaus-Peter},
  title     = {Development of low-cost injection moulded micropumps. Entwicklung von kosteng{\"u}nstigen, mittels Spritzguß hergestellten Mikropumpen / D{\"o}pper, J. (u.a.)},
  series = {Actuator 96 : Conference Proceedings ; 5th International Conference on New Actuators ; 26- 28 June, Bremen, Germany / Ed.: Hubert Borgmann. Publ. by: AXON Technology Consult GmbH},
  journal   = {Actuator 96 : Conference Proceedings ; 5th International Conference on New Actuators ; 26- 28 June, Bremen, Germany / Ed.: Hubert Borgmann. Publ. by: AXON Technology Consult GmbH},
  address   = {Bremen},
  pages     = {37 -- 40},
  year      = {1996},
  language  = {en}
}
@article{KaemperLehrEhrfeldetal.1997,
  author    = {K{\"a}mper, Klaus-Peter and Lehr, H. and Ehrfeld, W. and Hagemann, B.},
  title     = {Development of micro and millimotors. Lehr, H.; Ehrfeld, W.; Hagemann, B.; K{\"a}mper, K.-P.; Michel, F.; Schulz, C.; Th{\"u}rigen C.},
  series = {Minimally Invasive Therapy and Allied Technologies. 6 (1997)},
  journal   = {Minimally Invasive Therapy and Allied Technologies. 6 (1997)},
  isbn      = {1364-5706},
  year      = {1997},
  language  = {en}
}
@article{KaemperPicardSchuetze2005,
  author    = {K{\"a}mper, Klaus-Peter and Picard, A. and Sch{\"u}tze, A.},
  title     = {Die Ausbildungsfoundry pro-mst und das virtuelle Technologielabor: Ein Konzept f{\"u}r eine exzellente praktische MST-Ausbildung in einem modernen Reinraum zu niedrigen Gesamtkosten. Picard, A.; K{\"a}mper, K.-P.; Sch{\"u}tze, A.},
  series = {Mikrosystemtechnik-Kongress 2005 : 10. bis 12. Oktober 2005 in Freiburg ; gemeinsame Veranstaltung von: Bundesministerium f{\"u}r Bildung und Forschung (BMBF) ... / organisiert von: GMM VDE/VDI-Gesellschaft Mikroelektronik, Mikro- und Feinwerktechnik ... Chairman: Roland Zengerle},
  journal   = {Mikrosystemtechnik-Kongress 2005 : 10. bis 12. Oktober 2005 in Freiburg ; gemeinsame Veranstaltung von: Bundesministerium f{\"u}r Bildung und Forschung (BMBF) ... / organisiert von: GMM VDE/VDI-Gesellschaft Mikroelektronik, Mikro- und Feinwerktechnik ... Chairman: Roland Zengerle},
  publisher = {VDE-Verl.},
  address   = {Berlin},
  isbn      = {3-8007-2926-1},
  pages     = {127},
  year      = {2005},
  language  = {de}
}
@article{PlessmannWollertFiedler1995,
  author    = {Pleßmann, K. W. and Wollert, J{\"o}rg and Fiedler, J{\"o}rg},
  title     = {Die ganzheitliche und objektorientierte Prozesssteuerung - eine Vision?},
  series = {CIM-Management : Produkte, Strategien, Entscheidungshilfen},
  volume    = {11},
  journal   = {CIM-Management : Produkte, Strategien, Entscheidungshilfen},
  number    = {2},
  issn      = {0179-2679},
  pages     = {56 -- 60},
  year      = {1995},
  language  = {de}
}
@article{WollertKruseVedral2007,
  author    = {Wollert, J{\"o}rg and Kruse, Thomas and Vedral, Andreas},
  title     = {Die Kraft der drei Antennen : zuverl{\"a}ssige Funkkommunikation f{\"u}r die Automatisierungstechnik},
  series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme},
  volume    = {56},
  journal   = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler ; Sonderh. Wireless : Fachmedium f{\"u}r Entwicklungen funkbasierter Systeme},
  number    = {Sonderh. 2},
  issn      = {0013-5658; 1611-5120},
  pages     = {36 -- 42},
  year      = {2007},
  language  = {de}
}
@article{Wollert1999,
  author    = {Wollert, J{\"o}rg},
  title     = {Die Kunst des Weglassens : Windows NT Embedded - Was die neue Version vom Standard-NT unterscheidet},
  series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler},
  volume    = {Bd. 48},
  journal   = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler},
  number    = {H. 23},
  issn      = {0013-5658},
  pages     = {116 -- 121},
  year      = {1999},
  language  = {de}
}
@article{Kaemper2002,
  author    = {K{\"a}mper, Klaus-Peter},
  title     = {Die Mikroaktorik wird erwachsen},
  series = {INNO : innovative Technik - neue Anwendungen / Hrsg.: IVAM Fachverband f{\"u}r Mikrotechnik, Dortmund. Ausgabe 22 (2002)},
  journal   = {INNO : innovative Technik - neue Anwendungen / Hrsg.: IVAM Fachverband f{\"u}r Mikrotechnik, Dortmund. Ausgabe 22 (2002)},
  pages     = {4 -- 5},
  year      = {2002},
  language  = {de}
}