Accelerometer-based online reconstruction of fast telescope vibrations from delayed measurements

Alexander Keck; Jörg-Uwe Pott; Oliver Sawodny

doi:10.1117/12.2231667

27 July 2016 Accelerometer-based online reconstruction of fast telescope vibrations from delayed measurements

Alexander Keck, Jörg-Uwe Pott, Oliver Sawodny

Proceedings Volume 9906, Ground-based and Airborne Telescopes VI; 990630 (2016) https://doi.org/10.1117/12.2231667
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

A feedforward vibration cancellation system can be used to compensate for fast wind-induced telescope vibrations. Crucial is the position reconstructors ability to provide the compensation mirror with an accurate online estimate of the vibrational displacement. The authors have developed and presented a position reconstructor based on adaptive resonators. However, network data transmission of the acceleration signals introduces a time delay into the measurement chain. Any feedforward compensation setup can only function well if a delay-free estimate of the disturbance signal is provided. Three delay-compensating extensions of the developed position reconstructor are presented and analyzed.

Citation Download Citation

Alexander Keck, Jörg-Uwe Pott, and Oliver Sawodny "Accelerometer-based online reconstruction of fast telescope vibrations from delayed measurements", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 990630 (27 July 2016); https://doi.org/10.1117/12.2231667

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