15 July 2002 Design of an improved shape memory alloy actuator for rotor blade tracking
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A shape memory alloy actuated tab deflection mechanism for in-flight rotor blade tracking was designed, fabricated and tested. The design, comprises of dual SMA wire actuation device, passive lock and on-blade sensors. The system is integrated with a feedback position controller. Improvements, over the previous design, in shape memory alloy wire clamping mechanism, locking mechanism and controller operation were examined. An analytical model, incorporating Brinson's thermomechanical model was developed to predict actuator behavior. A design methodology, based on this model, was applied to identify the relationship between actuator design parameters and actuator target goals. The actuation system integrated into an NACA0012 blade section was tested on the bench-top. Tracking capability of +/- 6 degree(s) with a resolution of +/- 0.1 degree(s) was demonstrated.
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Kiran Singh, Inderjit Chopra, "Design of an improved shape memory alloy actuator for rotor blade tracking", Proc. SPIE 4701, Smart Structures and Materials 2002: Smart Structures and Integrated Systems, (15 July 2002); doi: 10.1117/12.474663; https://doi.org/10.1117/12.474663


Shape memory alloys


Feedback control



System integration

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