Active vibration control and suppression for intelligent structures

A finite element formulation for vibration control and suppression of intelligent structures with a new piezoelectric plate element is presented. On the basis of a negative velocity feedback control law, a general method of active vibration control and suppression for intelligent structures is put forth. Dynamic stability and the effect of vibration control for intelligent structures are investigated by introducing the state space equations of intelligent structures. The damped frequencies as well as the damping ratio are derived by state space analysis. The procedure is illustrated with the help of two numerical examples. The purpose of the first example is to check the accuracy of the present finite element solution with the analytical one. The second example is to study the problem of active vibration control and suppression for intelligent structures. (C) 1997 Academic Press Limited.