Active control of an acoustic black hole using a feedback strategy

Acoustic black holes (ABHs) are tapered structural features that can achieve high levels of damping within lightweight constraints. It has previously been proposed to integrate feedforward active vibration control into an ABH enable over a broad spectrum, however, the time-advanced information required in this strategy is not always available. In addition, it shown controlling reflection coefficient beam-based leads undesirable enhancement taper vibration. paper, feedback applied terminated beam, with piezoelectric patch providing actuation. The remote methodology and used examine different compensators potentially available simultaneously both local reflected wave component. investigation highlights be minimised without affecting wave, apart from few isolated frequencies, cannot increasing relative passive case. Importantly, since approach enables performance maintained whilst minimising tip, fatigue life structure extended addition loop.