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An investigation of shape memory alloys as actuating elements in aerospace morphing applications
Authors:D Karagiannis  D Stamatelos  Th Spathopoulos
Affiliation:1. Integrated Aerospace Sciences Corporation, Glyfada, Greece;2. Department of Aeronautical Sciences, Hellenic Air Force Academy, Dekelia Air Force Base, Attica, Greece;3. AEROTRON Research, Palaio Faliro, Greece
Abstract:Two innovative actuating concepts for aerospace morphing applications, based on shape memory alloys (SMAs), are proposed. The first concept investigates a composite plate incorporating embedded SMA wires. A nonlinear auto regressive with exogenous excitation model is proposed for controlling single-cycle/multi-cycle loading conditions of the SMA wires. The second actuating concept studies a novel rib configuration, which incorporates a compliant mechanism for enabling aerofoil's leading edge morphing. Different rib-compliant mechanism concepts are designed and analyzed. The most efficient rib concept is experimentally characterized. The experimental results from both actuating concepts showed good agreement with the respective numerical.
Keywords:Compliant mechanism  embedded wires  leading edge morphing  nonlinear auto regressive with exogenous excitation (NARX) model  shape memory alloys
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