NDLI: Aeroelastic analysis of helicopter rotor blades incorporating anisotropic piezoelectric twist actuation

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Aeroelastic analysis of helicopter rotor blades incorporating anisotropic piezoelectric twist actuation

Content Provider	NASA Technical Reports Server (NTRS)
Author	Belvin, W. Keith Wilkie Sr., W. Keats Park, K. C.
Copyright Year	1996
Description	A simple aeroelastic analysis of a helicopter rotor blade incorporating embedded piezoelectric fiber composite, interdigitated electrode blade twist actuators is described. The analysis consists of a linear torsion and flapwise bending model coupled with a nonlinear ONERA based unsteady aerodynamics model. A modified Galerkin procedure is performed upon the rotor blade partial differential equations of motion to develop a system of ordinary differential equations suitable for dynamics simulation using numerical integration. The twist actuation responses for three conceptual fullscale blade designs with realistic constraints on blade mass are numerically evaluated using the analysis. Numerical results indicate that useful amplitudes of nonresonant elastic twist, on the order of one to two degrees, are achievable under one-g hovering flight conditions for interdigitated electrode poling configurations. Twist actuation for the interdigitated electrode blades is also compared with the twist actuation of a conventionally poled piezoelectric fiber composite blade. Elastic twist produced using the interdigitated electrode actuators was found to be four to five times larger than that obtained with the conventionally poled actuators.
File Size	297568
Page Count	11
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20040110416
Archival Resource Key	ark:/13960/t1wd8sr8j
Language	English
Publisher Date	1996-01-01
Access Restriction	Open
Subject Keyword	Aircraft Design, Testing And Performance Actuators Numerical Integration Flight Conditions Elastic Bending Twisting Partial Differential Equations Hovering Rotor Blades Turbomachinery Anisotropy Piezoelectricity Nonlinearity Galerkin Method Frequency Response Aeroelasticity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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