• The Inria's Research Teams produce an annual Activity Report presenting their activities and their results of the year. These reports include the team members, the scientific program, the software developed by the team and the new results of the year. The report also describes the grants, contracts and the activities of dissemination and teaching. Finally, the report gives the list of publications of the year.

• Legal notice
• Personal data

## Section: New Results

### Parametric sub-optimal ${H}_{\infty }$ controllers for an optro-mechanical system

In collaboration with Safran Electronics & Defense, in [15], we studied the robust stabilization of the line of sight of a stabilized mirror system. This system can be modeled by a single-input single- output time-delay system. Due to large model uncertainties, non-parametric methods are usually too conservative. Hence, we consider here unfixed model parameters. Using an additive decomposition, we show how to compute parametric ${H}_{\infty }$ controllers of the time-delay model. Such a symbolic approach is interesting in the context of adaptive control and is illustrated throughout a simulation with an ideal parameter estimator.