Abstract
Truss structures are widely used for the support of structural loads in applications whereminimum mass solutions are required. Their nodes are normally constructed to resistrotation to maximize their stiffness under load. A multi-link node concept has recentlybeen proposed that permits independent rotation of tetrahedral trusses linked by such ajoint. High authority shape morphing truss structures can therefore be designed by theinstallation of linear displacement actuators within the truss mechanisms. Examples ofactuated structures with either linear or planar shapes are presented and their ability tobend, twist and undulate is demonstrated. An experimental device has been constructedusing one-way shape memory wire actuators in antagonistic configurations that permitreversible actuated structures. It is shown that the actuated structure displacementresponse is significantly amplified by use of a mechanically magnified design.
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