Strain-based displacement estimation for precision spacecraft structures
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Authors
Coleman, Craig S.
Subjects
Advisors
Walters, Donald
Agrawal, Brij N.
Date of Issue
2005-12
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
For precision spacecraft structures used for antennas and reflectors of telescopes, determination of in-orbit structural displacement and its control is very important. While this kind of measurement is relatively easy to carry out in a laboratory setting, it can be problematic in a real world environment. A procedure for the real-time determination of displacements at any point of a vibrating body can be utilized by measuring strain that is present. The procedure could employ measurement devices like Fiber Bragg Gratings, which are capable of very fine strain measurements. This thesis presents the finite element analysis of a truss similar to the NPS Space truss to observe the behavior of the strain relative to the displacement. A relationship between strain and displacement for the truss is derived.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Astronautical Engineering (MAE)
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xii, 35 p. : ill. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.