As a key enabler for future aviation technology, the use of servo electromechanical actuation\noffers new opportunities to transition innovative structural concepts, such as biomimicry morphing\nstructures, from basic research to new commercial aircraft applications. In this paper, the authors\naddress actuator integration aspects of a wing shape-changing flight surface capable of adaptively\nenhancing aircraft aerodynamic performance and reducing critical wing structural loads. The research\nwas collocated within the Clean Sky 2 Regional Aircraft Demonstration Platform (IADP) and aimed\nat developing an adaptive winglet concept for green regional aircraft. Finite Element-based tools\nwere employed for the structural design of the adaptive device characterized by two independent\nmovable tabs completely integrated with a linear direct-drive actuation. The structural design process\nwas addressed in compliance with the airworthiness needs posed by the implementation of regional\nairplanes. Such a load control system requires very demanding actuation performance and sucient\noperational reliability to operate on the applicable flight load envelope. These requirements were met\nby a very compact direct-drive actuator design in which the ball recirculation device was integrated\nwithin the screw shaft. Focus was also given to the power-off electric brake necessary to block\nthe structure in a certain position and dynamically brake the moveable surface to follow a certain\ncommand position during operation. Both the winglet layout static and dynamic robustness were\nverified by means of linear stress computations at the most critical conditions and normal mode\nanalyses, respectively, with and without including the integrated actuator system.
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