抄録
This paper considers the active vibration control of a distributed-parameter planar structure. Difficulty in actively controlling a distributed-parameter structure attributes to an infinite number of vibration modes it has, causing spillover problems that lead to the instability of a control system. First, a background of smart cluster sensor based upon the distributed sensor is outlined. Then, by assuming the reciprocity between sensing and actuation of a structure, the shaping function of the piezoelectric ceramics actuator is introduced. When the shaping function represented in a quadratic form is applied, the control force shall not be null regardless of the nodal lines running even on the actuator. One of the necessary conditions for the actuator to avoid the control spillover problem is that a control force cannot become zero, when the nodal line runs over the actuator. Finally, the experiment using a simply supported rectangular panel is conducted, demonstrating the validity of the proposed piezoelectric ceramics actuator.
