Piezoelectric self-sensing actuator for beam vibration control based on blind source separation

A blind source separation based vibration control method using piezoelectric self-sensing actuator is proposed. Two piezoelectric ceramic patches acting as actuators and two current amplifiers consist of the self-sensing bridge circuit. Each piezoelectric current is a mixture of strain rate current and capacitor current. As they are orthogonal and independent with each other the blind source separation technique is introduced to obtain the pure strain rate signal. An effort is made to solve the problem of BSS uncertainty in separation order Open loop experimental results on cantilever beam show the feasibility and validity of the proposed method.