Optimisation des lois de commande d’un imageur sur critère optronique. Application à un imageur à deux étages de stabilisation.

Abstract : The presented work on the Line of Sight stabilization of an optronic device meets the heightened demands regarding stabilization performances that come with the reduction of the time allowed to controller tuning.It includes the intrinsinc improvement of the system stabilization. The proposed solution features a double stabilization stage built from a single stabilization stage existing system. The new architecture is specified and the new components are chosen among the existing technology and experimentally characterized. A complete double stabilization stage model is then proposed.The simplification of the controller tuning process is another goal. The designed cost function F includes a high-level optronic criterion, the Modulation Transfer Function (that quantifies the level of blur broughtinto the image by the residual motion of the platform) instead of the usual low-level and potentially conservative criterion.The function F is costly to evaluate. In order to tune the controller parameters within industrial time constraints, a Bayesian algorithm, adapted to optimization with a reduced budget of evaluations, is implemented.Controllers of both stabilization stages are simultaneously tuned thanks to the previously developped system model.
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Sophie Frasnedo. Optimisation des lois de commande d’un imageur sur critère optronique. Application à un imageur à deux étages de stabilisation.. Autre. Université Paris-Saclay, 2016. Français. ⟨NNT : 2016SACLC079⟩. ⟨tel-01437573⟩

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