27 July 2016 Simulation of an accelerometer-based feedforward vibration suppression in an adaptive optics system for MICADO
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Abstract
In large telescopes like the E-ELT, the performance of the Adaptive Optics (AO) system is not only dominated by atmospheric disturbances but also by high frequency structural vibrations. Currently these vibrations are suppressed by a model-based feedback controller. When observing faint stars, the performance is reduced by a lower bandwidth because of a larger exposure time of the wavefront senor. The "control bandwidth" can be increased by an additional accelerometer-based feedforward controller, which is independent of the exposure time. This vibration suppression concept was studied in an AO end-to-end simulation and first investigations at a laboratory setup have been performed. Based on these results, we discuss the application for an on-sky testing at the LBT and an implementation in the MICADO AO.
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Martin Glück, Jörg-Uwe Pott, Oliver Sawodny, "Simulation of an accelerometer-based feedforward vibration suppression in an adaptive optics system for MICADO", Proc. SPIE 9909, Adaptive Optics Systems V, 99093N (27 July 2016); doi: 10.1117/12.2231852; https://doi.org/10.1117/12.2231852
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