Development of the fuel-powered compact SMA actuator: second generation actuator

Hyoung Y. Jun; Richard D. Allen; Dimitris C. Lagoudas; Othon K. Rediniotis

doi:10.1117/12.483879

14 August 2003 Development of the fuel-powered compact SMA actuator: second-generation actuator

Hyoung Y. Jun, Richard D. Allen, Dimitris C. Lagoudas, Othon K. Rediniotis

Proceedings Volume 5054, Smart Structures and Materials 2003: Industrial and Commercial Applications of Smart Structures Technologies; (2003) https://doi.org/10.1117/12.483879
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

This paper discusses the design and experimental results of the improved fuel-powered compact SMA actuator system and its comparison with the first-generation design. The K-alloy SMA strip (12 mm × 0.9 mm), actuated by a forced convection heat transfer mechanism, is embedded in a rectangular channel. In this channel, a rectangular piston, with a slot to accommodate the SMA strip, runs along the strip and prevents mixing between the hot and cold fluid in order to increase the efficiency of the system. The main energy source is fuel, such as propane, in order to achieve high energy and power densities of the system. Numerical analysis was performed to determine optimal channel geometry and to estimate maximum available force, strain and actuation frequency of the SMA actuator. The combustor/heat exchanger was designed to achieve higher heat transfer rates to the hot fluid from the energy source. The SMA actuator system is composed of pumps, valves, bellows, radiator, combustor/heat exchanger and control unit. The experimental testing of the SMA actuator system resulted in 735 N force with 2.5% strain and 0.25 Hz actuation frequency in closed-loop operation.

Citation Download Citation

Hyoung Y. Jun, Richard D. Allen, Dimitris C. Lagoudas, and Othon K. Rediniotis "Development of the fuel-powered compact SMA actuator: second-generation actuator", Proc. SPIE 5054, Smart Structures and Materials 2003: Industrial and Commercial Applications of Smart Structures Technologies, (14 August 2003); https://doi.org/10.1117/12.483879

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