Open Access
Fig. 8.
Example of tip mode power spectrum densities obtained on sky on HR 7710, as derived in pseudo-open loop (black), integrator with 0.4 gain (red) and LQG (blue) with clear vibrations at 18, 46 and 90 Hz, the origin of which is unknown. LQG dampens the vibration peaks, while the integrator amplifies the one at 90 Hz.
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