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A feasibility study of a post-buckled beam for actuating helicopter trailing edge flap

Mallick, Rajnish and Ganguli, Ranjan and Bhat, Seetharama M (2014) A feasibility study of a post-buckled beam for actuating helicopter trailing edge flap. In: ACTA MECHANICA, 225 (10, SI). pp. 2783-2787.

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Official URL: http://dx.doi.org/ 10.1007/s00707-014-1215-0

Abstract

Active trailing edge flaps (TEFs) are one of the most promising devices for helicopter vibration reduction. Smart actuators such as the piezoelectric stack actuators (PEAs) are used for TEF actuation. PEAs possess high energy density and have large force in dynamic condition but are limited to small displacements. In this investigation, we study a linear to rotary motion amplification mechanism (AM-2) based on a pinned-pinned post-buckled beam to actuate trailing edge flaps. A linear motion amplification mechanism is developed and coupled with AM-2 to amplify angular flap deflections. Experiments are conducted on bench top-test setup, and maximum flap angle deflections of the order of 12A degrees are achieved in the static case. An aeroelastic analysis is performed and 91 % reduction in helicopter vibration is obtained with multiharmonic control inputs.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the SPRINGER WIEN, SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 12 Nov 2014 05:13
Last Modified: 15 Nov 2014 17:52
URI: http://eprints.iisc.ernet.in/id/eprint/50222

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