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Closed loop cable robot for large horizontal workspaces
Sergio Juárez-Pérez,Antonio González-Rodriguez,Guillermo Rubio-Gómez,David Rodríguez-Rosa,Erika Ottaviano,Fernando J. Castillo-Garcia 국제구조공학회 2021 Smart Structures and Systems, An International Jou Vol.27 No.2
Inspection and maintenance of civil structures are important issues for sustainability of existing and new infrastructures. Classical approach relies on large human activities eventually performed in unsafe conditions. This paper proposed a non-invasive solution for inspecting horizontal surface such as decks of bridges. The proposal presented here is based in cable-driven robots and allows to inspect large surfaces maintaining a very low vertical occupancy in comparison to the conventional architecture of this kind of robot. Using closed cables loop instead of a set of cables a device with low motorization power and very large workspace is designed and prototyped. As example of control an inverse dynamics technique is applied to control the end-effector where inspection tool is located, e.g., a vision system. Experimental results demonstrate that this novel device allows to inspect large horizontal surfaces, with low motorization and low vertical occupancy.