Research Papers

Actuated Bistable Jumping Structures

[+] Author and Article Information
Matthew Santer

Department of Aeronautics, Imperial College London, Prince Consort Road, London SW7 2AZ, UKm.santer@imperial.ac.uk

J. Appl. Mech 77(3), 031009 (Feb 08, 2010) (9 pages) doi:10.1115/1.4000417 History: Received October 09, 2008; Revised August 14, 2009; Published February 08, 2010; Online February 08, 2010

The design and analysis of a fully actuated adaptive bistable structure is presented. This structure releases energy at a high frequency, which in consequence causes it to jump. Such structures have application as the basis for multistable adaptive systems. The dynamic transition of the bistable structure from its high-energy to low-energy stable states and the lower-frequency return transition are considered by reference to a specific example. The effect of embedded actuation on this behavior is also investigated.

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



Grahic Jump Location
Figure 1

(a) Graph showing moment versus rotation for a paired tape spring and leaf spring and (b) jumping bistable structure concept, showing both stable states.

Grahic Jump Location
Figure 2

(a) FEA of a tape spring in opposite-sense bending and (b) FEA of the bistable structure showing the stable equilibria when F2=0

Grahic Jump Location
Figure 3

Functional representation of a full actuation cycle of a NiTi spring actuator (shown in the inset)

Grahic Jump Location
Figure 4

Simplified dynamic model and associated free body diagram of the bistable jumping structure

Grahic Jump Location
Figure 5

(a) Contact force R versus time evaluated using the simplified analytical model and (b) contact force R versus time evaluated using nonlinear dynamic FEA

Grahic Jump Location
Figure 6

The dynamic FE model of the bistable jumping structure (a) neglecting resetting actuators and (b) including resetting actuators at the onset of jump showing the asymmetric transition path

Grahic Jump Location
Figure 7

(a) Bistable structure at the jump apogee, reset actuators pre-extended and (b) bistable structure at the jump apogee reset actuators not pre-extended

Grahic Jump Location
Figure 8

Minimum reset actuation force requirements and available reset actuation force over the transition from S2 to S1




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.

Related Journal Articles
Related eBook Content
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