Primary mirror control for large segmented telescopes: combining high performance with robustness

G. Witvoet, N. Doelman, R. Den Breeje

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)
1 Downloads (Pure)


Future large telescopes, such as E-ELT and TMT, will need feedback control of the thousands of actuators underneath their segmented primary mirrors (M1). Differences in actuator dynamics and spatially and temporally changing disturbances make it extremely diffcult to formulate classical controllers which are both suffciently robust and highly performing. Therefore, TNO has developed and tested a control approach, in which the actual system response is quickly measured, disturbances are continuously estimated and the controller is adapted in real-Time. The algorithm is tested on an actual M1-relevant setup, in which it converges to a sub-nm optimum within a few minutes, keeps track of changing disturbances and shows its reliability over multiple days.

Original languageEnglish
Title of host publicationGround-Based and Airborne Telescopes VI, 26 June - 1 July 2016, Edinburgh, United Kingdom
EditorsH.J. Hall, R. Gilmozzi, H.K. Marshall
Place of PublicationBellingham
ISBN (Electronic)9781510601918
Publication statusPublished - 2016
EventGround-Based and Airborne Telescopes VI - Edinburgh, United Kingdom
Duration: 26 Jun 20161 Jul 2016

Publication series

NameProceedings of SPIE


ConferenceGround-Based and Airborne Telescopes VI
Country/TerritoryUnited Kingdom


  • Adaptive control
  • E-ELT
  • Feedback control
  • Position actuator
  • Segmented mirror


Dive into the research topics of 'Primary mirror control for large segmented telescopes: combining high performance with robustness'. Together they form a unique fingerprint.

Cite this