'ACTIVE VIBRATION SUPPRESSION OF A SMART BEAM VIA PID CONTROLLER DESIGNED THROUGH WEIGHTED GEOMETRIC CENTER METHOD'Turan Abdullah, Onat Cem and Sahin Melin 'In this study, the effectiveness a PID controller designed through weighted geometric center (WGC) method is investigated in order to actively attenuate the free and the forced vibrations of a smart beam comprising piezoelectric sensor and actuator pairs. In practice, the smart beam is an aluminum beam with a Lead Zirconate-Titanate (PZT) patches attached to the surfaces in the bimorph configuration and fixed from a single end and the other end is free-standing. First the frequency response of the beam in the range covering the first resonance frequency is experimentally obtained. Then, a PID controller based on the weighted geometric center method is designed and applied to the obtained system model. The experimental results indicated that, the suppression of the vibration actively around the first resonance frequency of the smart beam is a viable one through the proposed controller.' |