Shape memory alloy actuator


An actuator that uses shape memory alloy.

Shape memory alloy actuators are compact, light, and produce large forces. The actuators can be driven repeatedly in a heat cycle or can be controlled arbitrarily by switching the electric current through the actuator itself. Lately, attempts have been made to use the alloys to build a servo system that has an appropriate feedback mechanism and a cooling system, intended for applications where quick response is not necessary in particular. Application examples under development are microgrippers for cell manipulation, microvalves for regulating very small amounts of flow and active endoscopes for medical use.


[Related Terms]
Microgripper, Microvalve, Active catheter