Hybrid linear microactuators and their control models for mirror shape correction

  • Kirill Shcheglov
  • Xiaoning Jiang
  • Risaku Toda
  • Zensheu Chang
  • Eui-Hyeok Yang
Research Paper

Abstract

Future space-based imaging systems demand ultra-lightweight mirrors, which would involve a large number of actuators to provide the needed surface correction. These lightweight actuators are required to be integrated with the mirrors to avoid a significant increase in overall areal mass density. This paper presents the fabrication and testing of a linear microactuator and the modeling of an actuated mirror composed of such lightweight actuators. The linear microactuator is driven by a combination of a piezoelectric actuator block and electrostatic comb drive units. A full nonlinear optimization model of a mirror lattice was developed to simulate a lightweight primary with embedded microactuators, which allows for an arbitrarily connected lattice with connector elements having an arbitrary stiffness and actuation response. The modeling yielded a high precision estimation of the mirror shape correction.

Keywords

Linear actuator Adaptive optics Large stroke Bulk-micromachining Active shape correction Segmented mirror 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Kirill Shcheglov
    • 1
  • Xiaoning Jiang
    • 2
  • Risaku Toda
    • 3
  • Zensheu Chang
    • 3
  • Eui-Hyeok Yang
    • 4
  1. 1.Sensors in Motion Inc.Los AngelesUSA
  2. 2.TRS Technologies, Inc.State CollegeUSA
  3. 3.Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaUSA
  4. 4.Stevens Institute of TechnologyCastle Point on the HudsonHobokenUSA

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