Modeling, control and experimental validation of a novel actuator based on shape memory alloys

Abstract:

The paper presents the development of a mechanical actuator using a shape memory alloy with a cooling system based on the thermoelectric effect (Seebeck–Peltier effect). Such a method has the advantage of reduced weight and requires a simpler control strategy as compared to other forced cooling systems. A complete mathematical model of the actuator was derived, and an experimental prototype was implemented. Several experiments are used to validate the model and to identify all parameters. A robust and nonlinear controller, based on sliding-mode theory, was derived and implemented. Experiments were used to evaluate the actuator closed-loop performance, stability, and robustness properties. The results showed that the proposed cooling system and controller are able to improve the dynamic response of the actuator.


Reference:

ROMANO, Roberto; TANNURI, Eduardo Aoun. Modeling, control and experimental validation of a novel actuator based on shape memory alloys. Mechatronics, v.19, n.7, p. 1169–1177, 2009.


Access to the summary of the article in site ScienceDirect:
http://www.sciencedirect.com/science/article/pii/S0957415809000592


SUBSCRIBE to our newsletter

Receive our news in your email.

INSCREVA-se em nossa newsletter

Receba nossas novidades em seu e-mail.