The Dynamic And Thermal Characteristics Of Shape Memory Actuators

A. Baz; K. Iman; J. McCoy

doi:10.1117/12.963105

5 February 1990 The Dynamic And Thermal Characteristics Of Shape Memory Actuators

A. Baz, K. Iman, J. McCoy

Proceedings Volume 1170, Fiber Optic Smart Structures and Skins II; (1990) https://doi.org/10.1117/12.963105
Event: OE/FIBERS '89, 1989, Boston, United States

Abstract

This paper presents an experimental and theoretical study of the dynamic and thermal characteristics of SHAPE MEMORY ACTUATORS (SMA). The actuators are made of a NIckel-TItanium (NITINOL) wires formed in the shape of helical coils that are capable of generating large deflections when subjected to low voltage excitations. The deflections produced are accompanied by significant forces resultingfrom the unique phase transformation of the NITINOL alloy as it is heated past its transition temperature. The effect of varying the wire diameter and length of the actuator on its dynamic and thermal behavior is measured both in the time and frequency domains. The actuators' behavior is monitored at different levels of excitation voltages as well as different heating and cooling strategies. The experimental results obtained are utilized to guide the development of mathematical models that describe the actuators' behavior as influenced by their design parameters and operating conditions. The experimental results and mathematical models presented are invaluable in guiding the selection of the design parameters of NITINOL actuators that are suitable for particular operating conditions.

Citation Download Citation

A. Baz, K. Iman, and J. McCoy "The Dynamic And Thermal Characteristics Of Shape Memory Actuators", Proc. SPIE 1170, Fiber Optic Smart Structures and Skins II, (5 February 1990); https://doi.org/10.1117/12.963105

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