Deployable structure

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A deployable structure is a structure that can change shape so as to significantly change its size.[1][2]

A field deployable control tower

Examples of deployable structures are umbrellas, some tensegrity structures, bistable structures, some Origami shapes and scissor-like structures. Deployable structures are also used on spacecraft for deploying solar panels and solar sails.

NuSTAR deployable mast (2009) in the stowed configuration.
NuSTAR deployable mast (2009) deploys to 10 meters in length.

References