A Flexible Structure's Active Vibration Suppression Using Smart Materials

Abstract

Response quantities like displacement, stress, vibration frequencies, and mode shapes must be calculated in engineering design in relation to a specified set of design parameters. However, because to manufacturing mistakes, measurement problems, and structural complexity, among other factors, the design parameter may be unknown. Numerous references have already treated these unknown structural parameters as probabilistic (random) models. However, uncertainty is not the same as randomness, and probabilistic modeling is not the only technique to characterize uncertainty. In order to address this issue, it is suggested that active control approaches be used using smart structural members made of piezoelectric materials coupled to structural members. A truss structure design and active vibration damping control system that makes use of piezoelectric actuators and sensors are presented. The controllers significantly boost the structure's damping, according to the results. Even when higher order modes and parametric uncertainties that were not taken into consideration during the control design process are present, the resilient H controller offers superior performance compared to the control strategies that were previously provided.