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Proceedings Paper

Design of a two degree of freedom shape memory alloy actuator for mirror positioning
Author(s): Eric A. Williams; Mohammad H. Elahinia
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Paper Abstract

Due to improvements in material properties through research, actuation mechanisms utilizing shape memory alloys (SMA) have been attracting more attention. Many actuation mechanisms have utilized the phase transformation of SMA's to generate motion. One new arena for the application of the alloys is the automotive industry, where they can reduce size and cost of the actuator in current models. The three major types of actuators employing SMA wires will be discussed. One such type, the antagonistic actuator, has begun to find applications where position can be controlled through the use of SMA wire. Based on this antagonistic actuator, a novel two degree of freedom SMA actuator is proposed which controls the position of an external rear view mirror. This design would replace the current DC motor design with a cheaper and more compact mechanism. The prototype concept is implemented using an antagonistic actuator based on an SMA wire, a joystick and a microcontroller.

Paper Details

Date Published: 5 April 2006
PDF: 8 pages
Proc. SPIE 6173, Smart Structures and Materials 2006: Smart Structures and Integrated Systems, 617304 (5 April 2006); doi: 10.1117/12.658707
Show Author Affiliations
Eric A. Williams, Univ. of Toledo (United States)
Mohammad H. Elahinia, Univ. of Toledo (United States)

Published in SPIE Proceedings Vol. 6173:
Smart Structures and Materials 2006: Smart Structures and Integrated Systems
Yuji Matsuzaki, Editor(s)

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