Design of Optimal Actuators for Piezoelastic Structuresbased on Analytical Computations and Measurement Data

摘要

A hybrid approach involving both analytical computations and measurement data is proposed for designingoptimal actuators for piezoelastic structures. The analytical part comprises the linear mathematical structure ofmodels of beams, plates or membranes which are appropriately described by mode shapes and modal paramters,i.e. eigenfrequencies, modal gains and modal damping. Also, the governing differential equation for perfect com-pensation of external loads due to piezoelectric actuation is applied. The measurement part relies on identificationof mode shapes and parameters under an external load using experimental modal analysis. The real-world datais fed into the analyical part with the ultimate goal of achieving a match between the modal gains due to externalloading and piezoelectric actuation. The algorithm which can be extended to various mathematical models ofpiezoelastic structures, is evaluated on a beam structure which is clamped at both ends.