Active Vibration Control of a Rotary Smart Beam Using Piezoelectric Patches

The active vibration control of a smart cantilever rotary beam, using dual sensor and actuator piezoelectric patches stuck on the outer surface of the beam, is studied. Motion equations are discretized by finite element method with 6 and 9 DOF elements for parts without piezoelectric patches and with them, respectively. Several types of controllers such as LQR, LQG and rate feedback controller are employed to actively control vibrations of the beam. Simulation results exhibit a better performance in terms of settling time for the LQR controller due to all states’ feedback; while rate controller is only relying on the sensor patches for feedback which is convenient in terms of cost. Also, the effect of the number of piezoelectric patches is studied.