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Parameterization Strategy for Optimization of Shape Morphing Compliant Mechanisms Using Load Path Representation

[+] Author Affiliations
Kerr-Jia Lu, Sridhar Kota

University of Michigan, Ann Arbor, MI

Paper No. DETC2003/DAC-48775, pp. 693-702; 10 pages
  • ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 2: 29th Design Automation Conference, Parts A and B
  • Chicago, Illinois, USA, September 2–6, 2003
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-3700-9 | eISBN: 0-7918-3698-3
  • Copyright © 2003 by ASME


The distributed compliance and smooth deformation field of compliant mechanisms provide a viable means to achieve shape morphing in many systems, such as flexible antenna reflectors and morphing aircraft wings. We previously developed a systematic synthesis approach to design shape morphing compliant mechanisms using Genetic Algorithm (GA). However, the design variable definition, in fact, allows the generation of invalid designs (disconnected structures) within the GA. In this research, we developed a load path representation to include the structure connectivity information into the design variables, thus improving the GA efficiency. The number of design variables is also independent of the number of elements in the finite element model that is used to solve for the structural deformation. The shape morphing synthesis approach, incorporating this path representation, is demonstrated through two examples, followed by discussions on further refinements.

Copyright © 2003 by ASME



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