Active Control of Sound Around A Fluid-Loaded Plate Using Multiple Piezoelectric Elements

This paper presents a method of using a least-squares approach and tabu search technique together with the commercially available FEA code, ANSYS, for active sound control around a fluid-loaded plate by multiple piezoelectric elements. A numerical model of FEA is used to construct the transfer function matrices, which relate the primary (an acoustic source) and the secondary (piezoelectric elements) sources to the acoustic pressures in the field of interest with consideration of environmental effects. With the transfer function matrices, the least-squares algorithm and tabu search technique are applied for subsequent active sound control. This paper shows how to implement the local and global active sound control in the upper and lower half-spaces of the plate by the use of multiple piezoelectric elements through some case studies.