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Open AccessArticle

Aeroelastic Assessments and Functional Hazard Analysis of a Regional Aircraft Equipped with Morphing Winglets

Aerospace Division, Industrial Engineering Department, University of Napoli “Federico II”, 80125 Naples, Italy
Adaptive Structures Division, Italian Aerospace Research Centre (CIRA), 81043 Capua, Italy
Author to whom correspondence should be addressed.
Aerospace 2019, 6(10), 104;
Received: 22 July 2019 / Revised: 28 August 2019 / Accepted: 5 September 2019 / Published: 20 September 2019
The application of morphing wing devices can bring several benefits in terms of aircraft performance, as the current literature shows. Within the scope of Clean Sky 2 AirGreen 2 European project, the authors provided a safety-driven design of an adaptive winglet, through the examination of potential hazards resulting from operational faults, such as actuation chain jamming or links structural fails. The main goal of this study was to verify whether the morphing winglet systems could comply with the standard civil flight safety regulations and airworthiness requirements (EASA CS25). Systems functions were firstly performed from a quality point of view at both aircraft and subsystem levels to detect potential design, crew and maintenance faults, as well as risks due to the external environment. The severity of the hazard effects was thus identified and then sorted in specific classes, representative of the maximum acceptable probability of occurrence for a single event, in association with safety design objectives. Fault trees were finally developed to assess the compliance of the system structures to the quantitative safety requirements deriving from the Fault and Hazard Analyses (FHAs). The same failure scenarios studied through FHAs have been simulated in flutter analyses performed to verify the aeroelastic effects due to the loss of the actuators or structural links at aircraft level. Obtained results were used to suggest a design solution to be implemented in the next loop of design of the morphing winglet. View Full-Text
Keywords: morphing wing aeroelasticity; morphing winglets; fault hazard assessments morphing wing aeroelasticity; morphing winglets; fault hazard assessments
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MDPI and ACS Style

Noviello, M.C.; Dimino, I.; Concilio, A.; Amoroso, F.; Pecora, R. Aeroelastic Assessments and Functional Hazard Analysis of a Regional Aircraft Equipped with Morphing Winglets. Aerospace 2019, 6, 104.

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