Abstract
This study on the vibration control of smart piezoelectric composite platesinvestigates the effect of the stretching-bending coupling of thepiezoelectric sensor/actuator pairs on the system stability of smart compositeplates. Based on first-order shear theory and consistent methodology,a smart isoparametric finite element is formulated and the classical negativevelocity feedback control method is adopted for the active vibration controlanalysis of smart composite plates with bonded or embedded distributedpiezoelectric sensors and actuators. It is shown mathematically anddemonstrated numerically that generally the coupling effect tends to result insystem instability unless the sensor/actuator pairs are collocated or the platesimply supported. The result of this study can be used to aid the placement ofpiezoelectric sensor/actuator pairs of smart composite plates as well as forrobust controller design.
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