DocumentCode :
2935943
Title :
Miniature Shape Memory Alloy Actuator for Tactile Binary Information Display
Author :
Velázquez, Ramiro ; Pissaloux, Edwige ; Szewczyk, Jérôme ; Hafez, Moustapha
Author_Institution :
Laboratoire de Robotique de Paris, CNRS FRE 2507 18 Route du Panorama, BP 61, 92265 Fontenay aux Roses, France velazquez@robot.jussieu.fr
fYear :
2005
fDate :
18-22 April 2005
Firstpage :
1344
Lastpage :
1349
Abstract :
This paper presents a new miniature actuator, which is currently being used to design and develop high resolution, lightweight and compact interfaces for tactile binary information representation such as Braille. Since the main drawback of these devices is their high cost, the proposed actuator exploits the simplicity of its design to provide a low-cost actuation alternative. Based on shape memory alloy (SMA) technology, the actuator consists of an antagonist arranged pair of NiTi helical springs. The actuator of 1.5 mm diameter and 150 mg weight is capable of developing a 320 mN pull force and 1.5 Hz bandwidth by using simple forced-air convection. A combined computational/experimental study on the thermomechanical properties of both SMA active element and actuator is presented to evaluate characteristics such as actuation speed, force and stroke. In conclusion, the prototype and performance results are reported and discussed.
Keywords :
NiTi helical spring; SMA; antagonist behavior; tactile actuator (taxel); Actuators; Bandwidth; Costs; Displays; Information representation; Prototypes; Shape memory alloys; Springs; Thermal force; Thermomechanical processes; NiTi helical spring; SMA; antagonist behavior; tactile actuator (taxel);
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Robotics and Automation, 2005. ICRA 2005. Proceedings of the 2005 IEEE International Conference on
Print_ISBN :
0-7803-8914-X
Type :
conf
DOI :
10.1109/ROBOT.2005.1570302
Filename :
1570302
Link To Document :
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