DISTRIBUTED PIEZOELECTRIC ELEMENT METHOD FOR VIBRATION CONTROL OF SMART PLATES

摘要

A new method for active control of plates is presented that includes methods for designing piezoelenctric modal sensors and modal actuators. The piezoelectric modal sensor and modal actuator are designed by cutting all of the piezoelectric layers into several independent elements. The modal coordinates and the modal velocities can be obtained from the charges and currents generated by the sensor elements, and the modal actuator is designed by modulating the spatial distribution of voltage applied on the piezoelectric actuator. A scheme for modal control of smart plates is given. Moreover, improvement of the controllabity of the plates due to segmentation actuator lamina is discussed.