Primal-dual optimization process of IFF-DVF active damping strategies. Applications to the beams
Résumé
Collocated direct velocity feedback (DVF) control strategies are hugely used to their robustness. This property is due to the systematic introduction of an energy dissipation in the structure. Up to now, the studies in literature are focused on the obtained mechanical efficiency in terms of modal damping ratio. We propose to adapt an integral force feedback (IFF) optimization criterion in the case of a DVF strategy. This criterion analyses the dissipation in terms of induced damping ratio but also in terms of control signal magnitude. We apply our optimization criterion on a slender beam on which is bonded an ideally collocated piezoceramic ‘actuator–sensor’ pair. Then, we achieve the experimental study of an original device for the isolation of sensitive electronic elements. We optimize the length of the actuators with the adapted criterion that we developed.