27 July 2016 Accelerometer-based online reconstruction of fast telescope vibrations from delayed measurements
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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.
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Alexander Keck, Alexander Keck, Jörg-Uwe Pott, Jörg-Uwe Pott, Oliver Sawodny, 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); doi: 10.1117/12.2231667; https://doi.org/10.1117/12.2231667
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