ICAS2002 CONGRESS n.1 ACTIVE VIBRATION CONTROL OF

Theoretical and experimental results of the modeling of a smart plate is presented for active vibration control. The smart plate consists of a rectangular aluminum plate modeled in cantilever configuration with surface bonded piezoelectric patches. The patches are symmetrically bonded on top and bottom surfaces. The study uses ANSYS (v.5.6) software to derive the finite element model of the smart plate. By using this model, the study first gives the influences of the actuator placement and size on the response of the smart plate and determines the maximum admissible piezoelectric actuation voltage. Based on this model, the optimal sensor locations are found and actual smart plate is produced. The experimental results of that smart plate are then used in the determination of a single input single output system model. By using this model, a single-input/single-output H ∞ controller is designed to suppress the vibrations due to the first two flexural modes of the smart plate. It has been shown that the designed controller guaranties robust performance. Nomenclature | | || ∞ Infinity norm of a signal or system)M(σ Maximum singular value of matrix M ∆ Norm bounded uncertainty block Fl Lower linear fractional transformation form µ Structured singular values for a system Other parameters are clearly defined wherever applicable.