Abstract
This paper proposes a multidisciplinary design optimization approach of smart structures for sound suppression. The smart structure consists of panel with one fixed end, two piezoelectric ceramic actuators and control system. The control system is designed according to the H_2 specification with a reduced-order modal model derived from FEM and modal analysis. The sound pressure level of radiated sound from the vibrating panel is calculated by BEM. Derived sound pressure level is converted to loudness level according to ISO 226, and then radiated sound power level is calculated. The design problem for improving the H_2 performance is defined, and then the piezoelectric ceramic actuators and the control system are simultaneously optimized by the presented approach, resulting in an enhanced performance for the sound suppression.
