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A four-fingered robot hand with shape memory alloys

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5 Author(s)
Valerie Farias ; Mecatrónica y Control de Sistemas (MCS), Universidad Panamericana, Aguascalientes, Mexico ; Lucia Solis ; Lorena Melendez ; Claudia Garcia
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This paper presents the design and implementation of a four-fingered human-size robotic hand intended for dexterous and grasping manipulation applications. The prototype hand has 3 degrees of freedom (DOF) per finger and 2 DOF in the thumb for a total of 11 DOF. Shape memory alloys (SMAs) micro-coils are embedded intrinsically within the hand structure to power the joints while exhibiting some advantageous features such as low-cost, lightweight, compactness and clean silent operation. To increase efficiency and decrease power dissipation, the SMA micro-actuators integrate magnetic bi-stable structures. Mechanical design, actuation approach and first prototype are presented and discussed.

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23-25 Sept. 2009