NDLI: Rollable thin-shell nanolaminate mirrors

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Rollable thin-shell nanolaminate mirrors

Content Provider	NASA Technical Reports Server (NTRS)
Author	Barbee Jr., Troy Lih, Shyh-Shiuh Hickey, Gregory
Copyright Year	2003
Description	A class of lightweight, deployable, thin-shell, curved mirrors with built-in precise-shape-control actuators is being developed for high-resolution scientific imaging. This technology incorporates a combination of advanced design concepts in actuation and membrane optics that, heretofore, have been considered as separate innovations. These mirrors are conceived to be stowed compactly in a launch shroud and transported aboard spacecraft, then deployed in outer space to required precise shapes at much larger dimensions (diameters of the order of meters or tens of meters). A typical shell rollable mirror structure would include: (1) a flexible single- or multiple-layer face sheet that would include an integrated reflective surface layer that would constitute the mirror; (2) structural supports in the form of stiffeners made of a shape-memory alloy (SMA); and (3) piezoelectric actuators. The actuators, together with an electronic control subsystem, would implement a concept of hierarchical distributed control, in which (1) the SMA actuators would be used for global shape control and would generate the large deformations needed for the deployment process and (2) the piezoelectric actuators would generate smaller deformations and would be used primarily to effect fine local control of the shape of the mirror.
File Size	580689
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110023815
Archival Resource Key	ark:/13960/t9867g88q
Language	English
Publisher Date	2003-05-01
Access Restriction	Open
Subject Keyword	Optics Electronic Control Actuators Shape Control Nanocrystals Shape Memory Alloys Thin Walled Shells Piezoelectric Actuators Imaging Techniques Laminates Mirrors Surface Layers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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