%0 Conference Proceedings %T Nonlinear Observer for the turbulent wake of a square cylinder %+ Laboratoire pluridisciplinaire de recherche en ingénierie des systèmes, mécanique et énergétique (PRISME) %+ Département Images, Robotique, Automatique et Signal [Orléans] (IRAUS) %A Ahmed, Javeria %A Courtial, Estelle %A Passaggia, Pierre-Yves %A Fruchard, Matthieu %A Mazellier, Nicolas %< avec comité de lecture %Z AUTOM %Z ESA %B 59th IEEE Conference on Decision and Control (CDC 2020) %C Jeju, South Korea %I IEEE %3 2020 59th IEEE Conference on Decision and Control (CDC) %P 5421-5427 %8 2020-12-14 %D 2020 %R 10.1109/CDC42340.2020.9304341 %Z Engineering Sciences [physics]/Automatic %Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]Conference papers %X Vortex shedding in the turbulent wake of a square cylinder is modeled by a minimal generalized empirical Galerkin model (GM). Pressure measurements on the sides and on the back of the bluff body are used as a system output to rebuild the system full state. Despite a large number of unresolved states and the intermittent character of the vortex shedding, the use of an observer makes possible the estimation of the shift mode and the growth rate of the dynamic model truncated at order two. A high gain observer is synthesized and both simulation and experimental results show promising applications for the feedback control of the vortex shedding in order to decrease the drag coefficient, even in the case of a turbulent wake flow at high Reynolds numbers. %G English %2 https://cnrs.hal.science/hal-03268422/document %2 https://cnrs.hal.science/hal-03268422/file/CDC_HGO_exp_accepted_v03.pdf %L hal-03268422 %U https://cnrs.hal.science/hal-03268422 %~ CNRS %~ UNIV-ORLEANS %~ TDS-MACS %~ PRISME-CVL %~ INSA-GROUPE %~ INSA-CVL