Piezoelectric self-sensing actuator for vibration suppression based on time-sharing method

A new time-sharing self-sensing method using piezoelectric actuators for active vibration suppression is proposed and investigated. This self-sensing technique is based on the idea that one PZT can have two electrical properties, namely whether it acts as a sensor or as an actuator. The actuation characteristics of the time-sharing self-sensing piezoelectric actuators were discussed. The shift between a sensor channel and an actuation channel results in a chopped control force. By applying the method of independent modal space control, a new procedure for the control force optimization of this type actuator is introduced. A numerical vibration suppression simulation demonstrated that the time-sharing self-sensing method works well on a beam structure. An experiment was carried out to test the practicability and the results proved the validity.