Vibration Control of Smart Structure Embedding the Metal Core Assisted Piezoelectric Fiber

This paper deals with an active vibration control of a new smart board designed by mounting the piezoelectric fibers with metal core on the surface of the CFRP composite. These complex fibers function as sensor and actuator in the CFRP board. A finite element model of a cantilever and a reduced order model for controller design are established. The piezoelectric fibers each have unevenness in the actuator outputs. Therefore, the liner fractional transformation (LFT) is formulated considering the unevenness of the actuator outputs as the perturbation. Next, the controller considering the perturbation and the robust stability is designed by using μ synthesis. The control performance of the proposed method is verified by experiment and it is shown that the use of piezoelectric fibers is effective in the vibration control.