Sinn, A., Schachner, S., Riel, T., Schwär, C., & Schitter, G. (2022). Feed-forward vibration compensation for small telescopes. In R. Navarro & R. GEYL (Eds.), Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V (pp. 12188-123-1-12188-123–127). SPIE. https://doi.org/10.34726/2921
Telescopes; Linear filtering; Vibration compensation; Tip-tilt compensation
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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.
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Projekttitel:
Adaptive Optik für Satellitenkommunikation mit bodenbasierten Teleskopen: 854050 (FFG - Österr. Forschungsförderungs- gesellschaft mbH)
