ACTIVE CONTROL OF FGM PLATES USING DISTRIBUTED PIEZOELECTRIC SENSORS AND ACTUATORS

摘要

Distributed sensing and active control of FGM plates using piezoelectric sensors/actuators is studied. A nine nodded piezolaminated plate finite element has been developed incorporating the FGM material model and the electromechanical coupling constitutive relations of the piezoelectric sensors/actuators. The FGM plate considered for study is made of the combined aluminum oxide and a titanium alloy, Ti-6Al-4V and its properties are graded through the thickness according to a volume fraction power law distribution. The vibration control performance is explored using the LQR optimal control law. The influence of the constituent volume fraction of Ti-6Al-4V is also studied for the static and controlled dynamic response of FGM plates.