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This research presents multimodal active vibration control of a cantilever beam by using piezoceramics smart materials, in particular the PZT (lead zirconate titanate), in the form of patches. These PZT patches are surface-bonded on the beam and perform as actuators and sensors. A real-time data acquisition and control system is used to record the experimental data and to implement designed controller. To assist control system design, system identification is conducted for the first three modes of the system. The state space model from system identification is used for observer design for state estimation and development of control algorithm. A linear quadratic regulator (LQR) controller is designed and is simulated using the identified model. Experimental results verify the simulated results and demonstrate the effectiveness of multimodal active control of the structure using smart materials.