Hybrid modeling for the active control of multibody smart structures – modeling validation

Abstract

This study deals with the modeling of multibody smart structures including distributed piezoelectric actuators and sensors. The hybrid modal-nodal (HMN) modeling method proposed for modal active control is based on a modal modeling of structural behavior and a nodal modeling of piezoelectric behavior independent of each other. The electromechanical coupling modeling is validated by applying it to a clamped-free smart beam model. The accuracy of the HMN method is shown by comparison with other modeling methods and experiment. Then, a hub-beam application including electromechanical couplings as well as mechanical couplings between rigid body modes and flexible modes is described. The corresponding modeling, the experiment and the comparison of the results are presented. This application demonstrates that the HMN method provides an appropriate and efficient solution for the predictive modeling and control of multibody smart structures with complex assemblies and geometries.