Distributed, Embedded Sensing for Quasi-Static Shape Control of Wings

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,983.00
Award Year:
2002
Program:
SBIR
Phase:
Phase I
Contract:
F33615-02-M-3259
Award Id:
57752
Agency Tracking Number:
021VA-1119
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
200 Boston Avenue Suite 2500, Medford, MA, 02155
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
786127522
Principal Investigator:
Marthinusvan Schoor
President
(781) 306-0606
tienie@mide.com
Business Contact:
DavidManion
Communications
(781) 306-0609
dmanion@mide.com
Research Institute:
n/a
Abstract
"An innovative sensor grid of shape-memory alloy wires is proposed to sense the shape of an aerodynamic surface. Shape memory alloys change resistance when deformed and they can thus be used as strain-sensors. The grid is formed by embedding a number ofshape memory alloy wires in an epoxy as one of the layers in a composite laminate. When encapsulated in an appropriate strain-gauge-like material, the grid can also be glued to the outer surface of the aerodynamic surface. Sensor wiring is significantlysimplified by only sensing resistance changes along the outer boundary of the grid. An innovative algorithm is proposed that will determine the grid-point-to-grid-point resistance using the "boundary-sensed" resistance changes. Assumed mode methods andother techniques are proposed to extract the shape of the aerodynamic surface from the measured resistance changes.In Phase I rectangular specimens will be fabricated and tested under cantilevered boundary conditions to verify feasibility. Phase I will also develop the shape-prediction algorithms. These algorithms will be implemented on DSPs or CPLDs in Phase II, inwhich a scaled wing model will either be constructed or supplied by the Air Force for instrumentation with the sensor-grid. In Phase II wind-tunnel tests will be performed and quasi-static shape prediction capability will be confirmed using otherdisplacement sensors or optical techniques. The proposed technology has wide

* information listed above is at the time of submission.

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