ACTIVE VIBRATION CONTROL OF A CANTILEVERED SMART STRUCTURE BY USING SPATIAL H ∞ CONTROL TECHNIQUE

Abstract- This study presents the vibration analysis of PZT structure by using Active Vibration Control. The smart beam is taken as cantilevered beam which is made up by the aluminum and configuration with surface bonded piezoelectric (PZT) patches. Piezoelectric patches are used as actuators and sensor for vibration analysis. Initially the smart beam was analytically modelled by using the analytical method. The model only included the first two flexural vibrational modes and the model correction technique was applied to compensate the possible error due to the higher order modes. The system model was also experimentally identified and both theoretical and experimental models were used together in order to determine the modal damping ratios of the smart beam. A starting of the research paper, the study presents the design and implementation of a spatial H ∞ controller for the active vibration control of a cantilevered smart beam. The controller is applied to a Cantilevered piezoelectric-laminated beam and is validated experimentally to show the effectiveness of the proposed controller in suppressing structural vibration. The vibration is controlled by the application of H ∞ controllers. At last the paper presents the effectiveness of the technique in the modeling