In this paper, we present modeling and characterization of coiled SMA spring actuators that are fabricated by coiling
cylindrical SMA wires on to a threaded screw mandrel and applying heat treatment. Here, we evaluate a theoretical model
that describes the actuation behavior of SMA coiled springs based on the constitutive model of SMA. We have
experimentally verified the developed theoretical model and analyzed various parameters with respect to temperature
change during actuation. The model was coded in Simulink® and the effects of various parameters with respect to
temperature change were investigated. Simulations were compared with experiments and good agreement was obtained.
We also show, how the high tension winding of SMA on the mandrel help in better performance and understanding of the
fabricated coiled SMAs.
Akshay Potnuru and Yonas Tadesse, "Characterization of coiled SMA actuators for humanoid robot," Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101640W (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 27, 2017; Published: 11 April 2017); https://doi.org/10.1117/12.2260289.
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