Active Vibration Damping Using Smart Material

We consider the Modeling and active damping of an elastic beam using distributed actuators and sensors. The piezoelectric ceramic material (P7T) is used to build the actuator. The sensor is made of the piezoelectric polymer polyvinylidene fluoride (PVDF). These materials are glued on both side of the beam. For the simple clamped beam, the closed loop controller has been shown to be able to extract energy from the beam. The shape of the actuator and its influence on the closed loop system performance are discussed. It is shown that it is possible to suppress the selected mode by choosing the appropriate actuator layout. It is also shown that by properly installing the sensor and determine the sensor shape we can further extract and manipulate the sensor signal for our control need.