Wavefront Correction of Optical Beam for Large Space Mirrors Using Robust Control Techniques

Abstract

For an imaging spacecraft to provide higher resolution imaging capability, the satellite will require larger mirrors. Because of the weight and launch constraints for spacebased optics systems, the mirrors will have to be segmented and light-weight, resulting in increased flexibility and lower structural frequencies. Consequently, achieving surface accuracy requirements for high resolution imaging with these large aperture light-weight mirrors become a challenging task. This paper investigates the use of adaptive optics for wavefront sensing and surface control of large segmented mirrors. An H1 robust control technique is considered for the control of the adaptive optics system with the reduced number of inputs and outputs using singular value decomposition and Zernike polynomials. The robust controller design with the reduced model is validated with a computer simulation for a full plant in the presence of disturbances.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2011
Accession Number
ADA570083

Entities

People

  • Brij N. Agrawal
  • Daniel C. Burtz
  • Jae J. Kim

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Actuators
  • Adaptive Optics
  • Cartesian Coordinates
  • Closed Loop Systems
  • Coefficients
  • Computer Simulations
  • Control Systems
  • Decomposition
  • Deformable Mirrors
  • Dynamics
  • Frequency
  • Multiple Input Multiple Output
  • Simulations
  • Space Based
  • Steady State
  • Transfer Functions
  • Wavefronts

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Image Processing and Computer Vision.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers