Future Space Telescopes Could be 100 Meters Across, Constructed in Space, and Then Bent Into a Precise Shape universetoday storybywill
deformation processing and hierarchical high-performance materials. As Harsh explained it:
In contrast to other in-space assembly and manufacturing approaches, Bend-Forming is low-power and is uniquely enabled by the extremely low-temperature environment of space. In addition, this technique enables smart structures that leverage multifunctional materials to achieve new combinations of size, mass, stiffness, and precision.
“The method of active control is called electrostatic actuation and uses forces generated by electrostatic attraction to precisely shape a metallic mesh into a curved shape which acts as the antenna reflector. We do this by applying a voltage between the mesh and a ‘command surface’ which consists of the Bend-Formed support structure and deployable electrodes. By adjusting this voltage, we can precisely shape the reflector surface and achieve a high-gain, parabolic antenna.
Harsh and his colleagues deduce that this technique will allow for a deployable mirror measuring more than 100 meters in diameter that could achieve a surface precision of 100 m/m and a specific area of more than 10 m/kg. This capability would surpass existing microwave radiometry technology and could lead to significant improvements in storm forecasts and an improved understanding of atmospheric processes like the hydrologic cycle.
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