High Power Density Magnetostrictive Reaction-Mass Actuator

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$599,806.00
Award Year:
1995
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
20541
Agency Tracking Number:
20541
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:
Monique Gaffney
(617) 661-0540
Business Contact:
() -
Research Institute:
n/a
Abstract
Magnetostrictive materials have been successfully used in single-axis actuator designs to produce forces over 3500 pounds, strains of 1200 ppm, and have bandwidths past 10,000 Hertz. Terfenol-D, the "giant strain" magnetostrictive material is an excellent candidate to produce a high power density reaction-mass actuator for helicopter gearbox noise cancellation. Using magnetostrictives, the single axis actuator can meet the weight, volume and durability requirements, without compromising the force or freuency range specifications. In contrast to piezoelectric materials, magnetostrictive materials have seven times larger strain and fifteen times higher energy density, resulting in more actuation effort for the given mass and volume budget. Unlike piezoelectrics, magnetostrictives do not require high voltages to operate efficiently. Compared with piezoelectrics, magnetostrictives have greater reliability and longer life advantages. The proposed work is to demonstrate the feasibility of using a magnetostrictive driven reaction-mass actuator for helicopter gearbox noise cancellation. During Phase I, the objective is to design, fabricate, test, and deliver a high-force density, magnetostrictive-based reaction-mass actuator. This actuator shall be capable of exceeding the suggested specifications of over 100 pounds at frequencies between 1000 and 4000 Hz. During Phase II, this work will be extended to multi-degree-of-freedom designs.

* information listed above is at the time of submission.

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