Terfenol-D-driven flaps for helicopter vibration reduction

Ralph C. Fenn; James R Downer; Dariusz A. Bushko; Vijay Gondhalekar; Norman D. Ham

doi:10.1117/12.152777

8 September 1993 Terfenol-D-driven flaps for helicopter vibration reduction

Ralph C. Fenn, James R Downer, Dariusz A. Bushko, Vijay Gondhalekar, Norman D. Ham

Proceedings Volume 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems; (1993) https://doi.org/10.1117/12.152777
Event: 1993 North American Conference on Smart Structures and Materials, 1993, Albuquerque, NM, United States

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.

Citation Download Citation

Ralph C. Fenn, James R Downer, Dariusz A. Bushko, Vijay Gondhalekar, and Norman D. Ham "Terfenol-D-driven flaps for helicopter vibration reduction", Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); https://doi.org/10.1117/12.152777

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