Strain-Based Displacement Estimation For Precision Spacecraft Structures

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.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2005
Accession Number
ADA443429

Entities

People

  • Craig S. Coleman

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Bragg Gratings
  • Composite Materials
  • Curvature
  • Displacement
  • Equations
  • Fiber Bragg Gratings
  • Finite Element Analysis
  • Frequency
  • Gages
  • Geometry
  • Measurement
  • Modal Analysis
  • Modulus Of Elasticity
  • Resonant Frequency
  • Spacecraft
  • Stiffness
  • Strain Gages

Fields of Study

  • Physics

Readers

  • Astronomy and Astrophysics.
  • Materials Science (Mechanical Engineering).
  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Space
  • Space - Satellites