Arti cial Intelligence system and Optimized Modal control for the ADONISadaptive optics

ADONIS is an adaptive optics user friendly instrument for the ESO 3.6-m telescope. The modal control technique is presented as a tool for optimizing the control of ADONIS. The perturbed wavefront is spread over a base of modes treated by the system in terms of their behavior with respect to the observing conditions (turbulence characteristics, anisoplanatic angle and star magnitude). This optimization and the multiple parameters innuencing the system performance are diicult to handle by the astronomer. Moreover, the wide range of situations the astronomical AO system has to deal with requires a exible connguration which has to be optimized for each case. The ADONIS instrument also has to be easy to use by an astronomer who doesn't have a deep knowledge of AO techniques. Finally, it must make eecient use of the telescope time. Hence, a new human interface and an intelligent control system have been designed.