Actuator placement for a bio-inspired bone-joint system based on SMA

Gheorghe Bunget; Stefan Seelecke

doi:10.1117/12.816309

6 April 2009 Actuator placement for a bio-inspired bone-joint system based on SMA

Gheorghe Bunget, Stefan Seelecke

Proceedings Volume 7288, Active and Passive Smart Structures and Integrated Systems 2009; 72880L (2009) https://doi.org/10.1117/12.816309
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

This paper presents an actuator placement study for a bio-inspired joint that is part of a smart-materials-based bat wing. The wing has been designed as part of the BATMAV project with the final goal of developing a biologically-inspired micro-air vehicle with foldable wings for flapping flight. The wing uses superelastic Shape Memory Alloy (SMA) joints and SMA muscle wire actuation. A kinematic model for the bat's flapping flight motion has been developed in a previous paper, while the current paper presents a study to determine attachment points for SMA actuator wires. At the center of the current analysis is the requirement to maintain compatibility with a typical SMA's strain capabilities while simultaneously ensuring the required joint angle motion to be achieved. The study yields a range of attachment parameters, which result in contraction strains of up to 2.5%, appropriate for high-cycle actuation.

Citation Download Citation

Gheorghe Bunget and Stefan Seelecke "Actuator placement for a bio-inspired bone-joint system based on SMA", Proc. SPIE 7288, Active and Passive Smart Structures and Integrated Systems 2009, 72880L (6 April 2009); https://doi.org/10.1117/12.816309

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