A stepped beam model is presented to predict analytically the natural frequencies and mode shapes of a uniform cantilever beam equipped with a piezoelectric patch. From the continuum model two discrete reduced-order representations are derived; their implications in the control design are discussed. An active non-collocated control scheme has been adopted to increase the cantilever damping by using an accelerometer positioned at the beam tip and a piezoelectric patch glued to the beam surface close to the support. Different output- feedbacks have been tested, and for all of them, the control effectiveness has been evaluated with both analytical and experimental models. Control spillover phenomena in some experienced cases have limited the control performance.
Feedback Bending Control Experienced by Piezoelectric Actuators
GATTULLI, VINCENZO;TATONE, Amabile
2003-01-01
Abstract
A stepped beam model is presented to predict analytically the natural frequencies and mode shapes of a uniform cantilever beam equipped with a piezoelectric patch. From the continuum model two discrete reduced-order representations are derived; their implications in the control design are discussed. An active non-collocated control scheme has been adopted to increase the cantilever damping by using an accelerometer positioned at the beam tip and a piezoelectric patch glued to the beam surface close to the support. Different output- feedbacks have been tested, and for all of them, the control effectiveness has been evaluated with both analytical and experimental models. Control spillover phenomena in some experienced cases have limited the control performance.Pubblicazioni consigliate
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