0
Research Papers

Post-Buckled Precompressed Techniques in Adaptive Aerostructures: An Overview

[+] Author and Article Information
Roelof Vos

Faculty of Aerospace Engineering, Delft University of Technology, 2600 GB Delft, The Netherlandsr.vos@tudelft.nl

Ron Barrett

Department of Aerospace Engineering, University of Kansas, Lawrence, KS 66045barrettr@ku.edu

J. Mech. Des 132(3), 031004 (Mar 19, 2010) (11 pages) doi:10.1115/1.4001202 History: Received October 06, 2008; Revised February 01, 2010; Published March 19, 2010; Online March 19, 2010

An overview of the development and application of post-buckled precompressed (PBP) piezoelectric actuators is presented. It has been demonstrated that PBP actuators outperform conventional piezoelectric actuators by relying on axial compression to counter the inherent stiffness in the actuator element. In doing so, the mechanical work output has been shown to increase threefold compared with conventional bimorph actuators. Actuator stroke has been demonstrated to increase up to 300% without compromising the blocked force capability. This has resulted in an expansion of the design space of piezoelectric bender elements and has made them excellent candidates for potentially replacing certain classes of conventional electromechanical flight control actuators. The successful application of PBP elements can be found in unmanned aerospace systems ranging from subscale vertical-take-off-and-landing vehicles to supersonic missile fins. With respect to conventional electromechanical servoactuators, it is demonstrated that PBP actuator elements induce a lower systems weight fraction, a substantially higher bandwidth, and an order of magnitude lower power consumptions and part count.

Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Operating principle of PBP actuator (14)

Grahic Jump Location
Figure 2

Bimorph piezoelectric actuator element

Grahic Jump Location
Figure 3

Terms and conventions for analysis of the PBP actuator arrangement

Grahic Jump Location
Figure 4

End rotation amplifications due to axial compression as predicted by Eq. 10 for various applied moments

Grahic Jump Location
Figure 5

Model problem for the dynamic analysis of PBP actuator elements

Grahic Jump Location
Figure 6

Effect of axial force on amplitude response of PBP actuator element

Grahic Jump Location
Figure 7

Effect of lumped inertia on first natural frequency of PBP actuator element

Grahic Jump Location
Figure 8

Effect of torsional stiffness on first natural frequency of PBP actuator element

Grahic Jump Location
Figure 9

Relation between end peak-to-peak rotation and axial force for example PBP bimorph actuator element

Grahic Jump Location
Figure 10

Transfer efficiency of axially loaded transducer elements (21)

Grahic Jump Location
Figure 11

Axially compressed double unimorph piezoelectric actuator (22)

Grahic Jump Location
Figure 12

PBP/DEAS actuator element (24-25)

Grahic Jump Location
Figure 13

Schematic representation of facing sheet engagement and definitions (25)

Grahic Jump Location
Figure 14

Stiffening effect due to DEAS in PBP actuator element

Grahic Jump Location
Figure 15

Increase in design space by switching from plain bimorph piezoelectric actuator to PBP bimorph actuator

Grahic Jump Location
Figure 16

The active experimental device: placement of the MFC actuators (left) and the assembled device in experimental test fixture (right) (27)

Grahic Jump Location
Figure 17

Experimental setup for PBP snap-through experiment (32)

Grahic Jump Location
Figure 18

Application of PBP flight control actuators (14)

Grahic Jump Location
Figure 19

Subscale UAV employing PBP actuated morphing panels (38)

Grahic Jump Location
Figure 20

PBP actuated synthetic jet (39)

Grahic Jump Location
Figure 21

PBP actuated flight control surface for micro aerial vehicle (41)

Grahic Jump Location
Figure 22

PBP/DEAS experimental test article actuator core and assembly into aeroshell (42)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In