SENSING AND VIBRATION CONTROL OF PIEZOELECTRIC SHELLS : Segmented distributed sensors and actuators

Abstract

There are observability and controllability problems for anti-symmetrical vibration modes of simply supported shells with single-piece symmetrically or fully distributed piezoelectric sensors and actuators. One method of overcoming this problem is to segment the distributed piezoelectric sensor and actuator into a number of sub-regions. In the present paper, the sensing and vibration control of elastic shells with top segmented distributed piezoelectric sensors and bottom segmented distributed piezoelectric actuators is investigated. A "laminated piezoelectric shell element" by the finite element method is formulated and the efficiency of segmented distributed sensors and actuators is verified.