Observer-Based Control Techniques for the LBT Adaptive Optics under Telescope Vibrations

This paper addresses the application of observer-based control techniques for the adaptive optics system of the LBT telescope. In such a context, attention is focused on the use of Kalman and H∞ filters to estimate the temporal evolution of phase perturbations due to the atmospheric turbulence and the telescope vibrations acting on tip/tilt modes. We shall present preliminary laboratory experiments carried out at theOsservatorio Astrofisico di Arcetri using the Kalman filter.