Experimental Identification and Control of a Cantilever Beam Using ERA/OKID with a LQR Controller

This paper presents an experimental study of the system identification and vibration control of a cantilever beam. For system identification, a white noise was applied, and the response signal was measured. These signalswere used to feed the eigensystem realization algorithm Observer/Kalman Filter identification method. The identified system was reduced using the Hankel norm model. An linear quadratic regulator controllerwas projected to operate just on the first two natural frequencies of the structure. The damping ratio of the first mode was effectively increased from 0.009 to 0.046.