Adaptive vibration control of a cylindrical shell with laminated PVDF actuator

Adaptive vibration control of a cylindrical shell partially covered by a laminated PVDF actuator (LPA) is investigated. The electromechanically coupled equations of the system are derived and the analytical expressions of the actuating forces and moments induced by LPA are obtained. Based on the formula of actuating forces and moments, the geometric parameters and the position of the LPA can be optimized. The non-axial-symmetric vibrations of a clamped-free cylindrical shell partially treated with LPA are controlled using an adaptive filtered-X least mean square algorithm. Using a five-layered LPA, the vibration of the shell is suppressed significantly under 54V control voltage. A theoretical analysis and the results of the experiment show that the multi-layered LPA possesses some salient features including large driving forces, small bonding area, low control voltage and powerful control capability for the shell structures.