Vibration control of a smart structure embedded with metal-core piezoelectric fibers

Abstract

This paper addresses the active vibration control of a new smart board designed by mounting piezoelectric fibers with a metal core on the surface of the CFRP composite. These complex fibers function as sensors and actuators in the CFRP board. A finite-element model of a cantilever and a reduced order model for controller design were established. The piezoelectric fibers are uneven in the actuator outputs. Therefore, a linear fractional transformation (LFT) is formulated considering the unevenness of the actuator outputs as the perturbation. Next, the controller is designed by using μ synthesis, considering the perturbation and robust stability. The control performance of the proposed method is verified by experiment and demonstrates that piezoelectric fibers can be effectively used in vibration control.

Keywords:

• VIBRATION CONTROL
• SMART STRUCTURE
• METAL CORE PIEZOELECTRIC FIBER
• MU SYNTHESIS