An active vibration control hybrid system using Fiber Bragg Grating (FBG) sensors and piezoelectric (PZT) actuators for vibration suppression is presented. An aluminum test-structure have been provided with FBGs sensors bonded below the same number of PZT actuators in a co-located configuration. A novel bonding procedure was used to realize the co-located sensors/actuators cells combining epoxy based glue filled with glass micro-balloons matching the size of optical fibers. Closed loop operation was implemented by using a Proportional-Derivative controller and proper designed power amplifiers to drive the actuators based on the FBGs response. Positioning criteria based on sensitivity considerations have been implemented to define the positioning of the sensors/actuators cells. The system was first validated through open loop tests comparing experimental results with numerical predictions. Finally, "closed loop" configuration tests have been carried out demonstrating of vibration-noise reduction up to 17 dB.
|Titolo:||Fiber bragg grating sensors and piezoelectric actuators in Co-located configuration for active vibration control applications|
|Data di pubblicazione:||2008|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|