Stability and controllability analysis of piezoelectric smart plates

The controllability and stability of a smart plate with piezoelectric senso r acid actuator laminae are analyzed from the viewpoint of energy. In terms of the power flow, the relation between the change of energy of the plate and the control voltage is derived. On the basis of power flow, some proper ties about the stability of the controlled plate are given. Moreover, some uncontrollable cases of the smart plate attached with a whole piezoelectric lamina actuator with spatially uniform distributed voltage are examined. F inally the effect of segmentation of the piezoelectric lamina on improving the controllability of the smart plate is discussed.