In this paper we investigate the power requirements of a piezoelectric actuator operating in a damping augmentation loop. When the piezoelectric actuator is driven by a current amplifier, we show that acceleration feedback augments the damping of the structure without changing the stiffness. Using this controller, we determine the real and reactive power flow through the structure and actuator into the amplifier when the structure is excited with a sinusoidal disturbance force. Estimates of the real and reactive power flow in terms of the actuator parameters are given. These estimates are useful for sizing the drive amplifier for the actuator.
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