Journal Name:
- Istanbul University Journal of Electrical & Electronics Engineering
| Author Name | University of Author |
|---|---|
Abstract (2. Language):
To overcome low response speed and low control precision in the existing traditional shape memory
alloy actuators, the new type of structure named planar bending embedded shape memory alloy
actuator was developed. Two SMA wires were embedded in parallel with the axis of the elastic rod. The
actuating wire, which was superposed along rod’s axis, was set to obtain “U” memory shape and the
restoring wire, which was placed off-axially, got straight memory shape. The differential stain gauges
were located at suitable position in corresponding to the actuator’s bending direction in order to
measure the signal of displacement. By making use of continuity, common origin and common limit
conditions and adjusting martensite fraction coefficients appropriately, the analytical model was
deduced to adequately account for the presence of major and minor hysteresis loops. The structural
parameters of 60mm long actuator, such as rod’s radius, wire’s radius, wire’s recoverable curvature
and offset distance, were optimized by combining analytical model with experimental results. The
experimental results prove the merits in optimal prototype.
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