作者: Kiran Singh , Jayant Sirohi , Inderjit Chopra
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摘要: The design, analysis, and testing of an improved Shape Memory Alloy (SMA)-based tracking tab actuator is described in this paper. goal the to provide in-flight capability for a helicopter rotor order minimize 1/rev vibrations due dissimilarities. Previous SMA-based designs demonstrated potential but admitted drawbacks that led inconsistent operation under air-loads. current research builds upon existing knowledge base addresses challenges encountered previous designs. objective achieve deflection 58 with accuracy 0:18 realistic aerodynamic loading conditions. present actuation concept based on bidirectional motion pair antagonistic SMA wires, passive friction brake lock position. A theoretical model was developed Brinson’s thermomechanical model. used predict behavior ex...