|
Piezoelectrics are one example of smart materials that can be used as sensors and actuators in active systems.
Over the last two decades, piezoelectric ceramics have been employed for vibration control in laboratory demonstrations and in a
few select applications. One of the limitations to more widespread adoption of piezoelectric vibration suppression technology has
been the lack of integration of the piezo transducers and the electronics used for power distribution, sensor conditioning and
control. In response to this concern, CSA developed a device that contains piezoelectric actuators and sensors,
sensor conditioning, a high voltage power amplifier, and programmable control electronics. This device was the first combination
electromechanical system of its type and demonstrated necessary technology for numerous subsequent devices developed by CSA
and its SmartPatch subcontractor, ACX. The SmartPatch can be used to control vibrations in panel, plate, shell, and beam type
structures at frequencies range from 10 to 500 Hz.
|