Topological Synthesis of Compliant Mechanisms Using Multi-Criteria Optimization

TLDR

Compliant mechanisms achieve motion through elastic deformation. The paper proposes a new topological synthesis method for single‑piece compliant mechanisms that uses a design‑for‑required‑deflection approach, illustrated with a simple beam example and motivating a multi‑criteria design framework. The method simultaneously satisfies motion and loading requirements for specified input forces and output deflections, implemented using a truss ground structure and a two‑dimensional continuum with design examples.

Abstract

Compliant mechanisms are mechanical devices that achieve motion via elastic deformation. A new method for topological synthesis of single-piece compliant mechanisms is presented, using a “design for required deflection” approach. A simple beam example is used to illustrate this concept and to provide the motivation for a new multi-criteria approach for compliant mechanism design. This new approach handles motion and loading requirements simultaneously for a given set of input force and output deflection specifications. Both a truss ground structure and a two-dimensional continuum are used in the implementation which is illustrated with design examples.