Feed-forward vibration compensation for small telescopes

Andreas Sinn; Stephan Schachner; Thomas Riel; Christian Schwaer; Georg Schitter

doi:10.1117/12.2626965

29 August 2022 Feed-forward vibration compensation for small telescopes

Andreas Sinn, Stephan Schachner, Thomas Riel, Christian Schwaer, Georg Schitter

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 121883H (2022) https://doi.org/10.1117/12.2626965
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

This publication investigates the applicability of feed-forward vibration compensation for small telescope systems in one axis, based on commercial-off-the-shelf accelerometers and a fast-steering mirror (FSM). The vibrations are measured with multiple accelerometers and their influence onto the optical path is reconstructed using a highpass filtered double integrator. Consequently, the reconstructed deviations are compensated in a feed-forward control manner by the FSM. A quad-photo-diode and an artificial star are used for verification of the performance of the system. Exemplary disturbance spectra are acquired on a roof-top using a small telescope system. They are applied to the developed system in a laboratory environment, successfully demonstrating the applicability of the proposed compensation concept by reducing the RMS tip-tilt error of the azimuth axis by a factor of 2.2 in the relevant frequency range.

Citation Download Citation

Andreas Sinn, Stephan Schachner, Thomas Riel, Christian Schwaer, and Georg Schitter "Feed-forward vibration compensation for small telescopes", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 121883H (29 August 2022); https://doi.org/10.1117/12.2626965

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