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Monday, July 8 • 16:50 - 17:10
OPTIMAL FEEDFORWARD CONTROL OF A BEAM WITH AN ACTIVE ACOUSTIC BLACK HOLE TERMINATION

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Acoustic black holes are structural features that are realised by tapering the thickness of a beam or plate, usually via a power law profile. Practical acoustic black holes have been shown to significantly reduce vibrations at high frequencies when combined with a thin layer of passive damping but, due to design constraints on the taper length and tip height, passive designs are somewhat limited at lower frequencies. In this paper, an active solution has been investigated to control the low frequency vibration of a beam with an acoustic black hole termination. Piezoelectric patch actuators have been attached to the taper and unconstrained feedforward control has been simulated to minimise the kinetic energy of the uniform beam section. The effect that this control strategy has on the structural response has been investigated through a series of numerical simulations and the potential performance of an active acoustic black hole has thus been demonstrated.

Moderators
avatar for Alain Berry

Alain Berry

Professor, Université de Sherbrooke
avatar for Philippe-Aubert Gauthier

Philippe-Aubert Gauthier

Professor, Groupe Acoustique Université de Sherbrooke, Université de Sherbrooke

Authors

Monday July 8, 2019 16:50 - 17:10 EDT
Westmount 6
  T02 Act. noise & vib. cntrl., RS01 Active cntrl of snd & vibr