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Proceedings Paper

Terfenol-D-driven flaps for helicopter vibration reduction
Author(s): Ralph C. Fenn; James R Downer; Dariusz A. Bushko; Vijay Gondhalekar; Norman D. Ham
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Paper Abstract

The utility of helicopter aviation is limited by the high vibration levels caused by interaction of each rotor blade with the wake of preceding blades. Existing full blade actuation using a swashplate has various problems such as insufficient bandwidth, limitations in the number of harmonics controlled, high maintenance, and lack of spanwise lift variation. These problems are avoided by the proposed flap operated, individual blade control system, which uses magnetostrictive actuation technology. Terfenol-D actuation has many advantages over competing technologies such as hydraulic systems, electric motors, and piezoelectric elements. These benefits include all-electric operation, simplicity and reliability, low mass, low voltage, and insensitivity to centripetal acceleration.

Paper Details

Date Published: 8 September 1993
PDF: 12 pages
Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); doi: 10.1117/12.152777
Show Author Affiliations
Ralph C. Fenn, SatCon Technology Corp. (United States)
James R Downer, SatCon Technology Corp. (United States)
Dariusz A. Bushko, SatCon Technology Corp. (United States)
Vijay Gondhalekar, SatCon Technology Corp. (United States)
Norman D. Ham, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 1917:
Smart Structures and Materials 1993: Smart Structures and Intelligent Systems
Nesbitt W. Hagood; Gareth J. Knowles, Editor(s)

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