Magnetostictively-Actuated Flaperon to increase rotor thrust

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$599,908.00
Award Year:
1995
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
20534
Agency Tracking Number:
20534
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
12 Emily Street, Cambridge, MA, 02139
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dariusz A. Bushko
(617) 661-0540
Business Contact:
() -
Research Institution:
n/a
Abstract
Progress in electric flight control has been hindered by the lack of a high bandwidth actuator. The challenge is to identify an efficient, responsive, and powerdense source of mechanical displacement. Actuators based on "giant" magnetostrictive materials, such as Terfenol, achieve very high magnetic strain (up to 2,000 ppm) and therefore provide power density unmatched in electromechanical systems. They outperform all known piezoelectric materials in terms of mechanical properties. SatCon has used Terfenol in several high performance actuators for space applications. In a large-stroke actuator, however, strain must be amplified while preserving power density. SatCon proposes to demonstrate an innovative actuator which uses local hydraulics to transform magnetostrictive strain into an arbitrarily long stroke. Magnetostriction generates pressurized fluid flow which powers a linear hydraulic actuator. The benefits of high performance hydraulics are retained without sacrificing the weight, redundancy, reliability, and simplicity of electric actuation. During Phase I, SatCon will develop a preliminary actuator design suitable for a cyclic/collective application. During Phase II, SatCon will detail design, fabricate, and bench test the actuator. Specifications will be as stated (3 inch stroke, 25 hp rating, and a reponse comparable to hydraulics). Alternate forms of electric power will be studied. Air cooling will be maximized.

* information listed above is at the time of submission.

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