Journal Release: Control of vibration in a plate using Active Acoustic Black Holes

ISLNE researchers have published a new journal paper: “Control of vibration in a plate using Active Acoustic Black Holes” published by IOP journal Smart Materials and Structures.

ISLNE researchers Dr Kristian Hook, Dr Jordan Cheer and Professor Steve Daley have published a new journal paper: “Control of vibration in a plate using Active Acoustic Black Holes”. The paper has been published with Gold Open-Access in the IOP journal Smart Materials and Structures.

The article extends the concept of an Active Acoustic Black Hole to a plate, building on the previously published article “Active feedforward control of flexural waves in an Acoustic Black Hole terminated beam”. The work demonstrates the performance benefits that can be obtained by embedding Active Acoustic Black Holes into a plate. A hybrid control strategy has been implemented, which takes advantage of the passive damping provided by ABHs at higher frequencies and combines this with a global multichannel active control strategy below 2 kHz. The resulting smart structure has been shown to provide superior vibration attenuation compared to a passive plate with Acoustic Black Holes and requires less energy compared to a purely active system. In addition, the structure is also lighter than the equivalent plate with a constant thickness profile, highlighting that Active Acoustic Black Holes are both a lightweight and broadband damping solution.