Primary mirror shape control for athermalization using embedded sensors

Computer Science

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

The next generation of space telescopes will be required to meet very challenging science goals. In order to achieve these goals, the size of the primary mirror will need to be increased. However, since current telescopes are reaching their limits in terms of size and mass, new designs will require advanced technologies such as lightweight mirrors and active optical control. Traditional shape control of the primary mirror relies on feedback from a wavefront sensor located in the optical path. However, a wavefront sensor reduces the amount of light available for image formation. Therefore, to view very dim objects, it will be necessary to use a different type of sensor. In this work, a quasi-static shape control algorithm is developed to correct errors in the mirror due to thermal disturbances using only sensors embedded in the mirror. Control algorithms are presented for both embedded strain gages and temperature sensors. Finite element models of both a simple flat plate mirror and a rib-stiffened mirror are generated and analyzed using Nastran. The flat plate model, with surface-parallel actuation is used to compare the two algorithms. Following this, the parametric model for a rib-stiffened mirror is used to analyze the effects of the shape control algorithm as the mirror geometry is changed. It is shown that correction of a mirror can be achieved using these embedded sensors.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Primary mirror shape control for athermalization using embedded sensors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Primary mirror shape control for athermalization using embedded sensors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Primary mirror shape control for athermalization using embedded sensors will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1294034

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.