Influence of one and two dimensional piezoelectric actuation on active vibration control of smart panels

The influence of-directional piezoelectric actuation (d(31) not equal d(32)), and isotropic piezoelectric actuation (d(31) = d(32)) on static deflection and control behaviour of aluminium panels is evaluated through numerical experiments. A four-node Piezo-Elastic field consistent plate element based on Mindlin-Reissner theory is developed and the finite element procedure is implemented in MATLAB(R) platform. An active control scheme using Linear Quadratic Regulator is adopted in modal domain for the first mode control. The control analysis shows that the actuator efficiency is significantly modified with boundary effects. The directional actuation that actually represents the piezoelectric anisotropy has a better control performance compared to isotropic actuation. The results of the control study clearly indicate that if the d(32)-based actuation effect is minimised then better control can be achieved. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.