Towards the development of a triple SMA actuated vertical tube

Saeed Karimi; Bardia Konh; Ebrahim Seidi

doi:10.1117/12.2296441

15 March 2018 Towards the development of a triple SMA actuated vertical tube

Saeed Karimi, Bardia Konh, Ebrahim Seidi

Proceedings Volume 10595, Active and Passive Smart Structures and Integrated Systems XII; 105953D (2018) https://doi.org/10.1117/12.2296441
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States

Abstract

In this work an active vertically hung tube has been designed, fabricated and tested. The active tube was made of three separate 3D printed parts assembled and glued together. Shape Memory Alloy (SMA) wires were embedded as actuators in the body of the tube to privilege from their robust actuation and high energy density. Three SMA wires were trained and installed evenly on the exterior peripheral side of the tubes to realize motion in multiple directions. A deadweight was hung to one end of the tube to exert a certain amount of pre-stress on actuators. This design offers a restricted actuation because the two wires on the opposite side always resist the intended deflection. Hence, for a proper actuation, each wire was stressed to a certain level to exhibit either expansion or contraction upon demand. This amount of stress was selected based on rigorous experimental data. Power supply units were integrated and linked to a python program to control the amount of power passed through each SMA wire. The active tube was tested, and its movement was captured via a camera and analyzed by ImageJ software for the two cases free of stress and with an applied external load. The electrical resistance of the each SMA wire was measured and used for controlling the tube’s deflection in each direction. This work demonstrated the feasibility of using three evenly distributed SMA wires on a tube to create motion in 3D direction.

Citation Download Citation

Saeed Karimi, Bardia Konh, and Ebrahim Seidi "Towards the development of a triple SMA actuated vertical tube ", Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 105953D (15 March 2018); https://doi.org/10.1117/12.2296441

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