Active vibration control of a rectangular flexible plate structure using high gain feedback regulator

Abstract

This paper presents an investigation into the application of a high gain feedback re gulator for the problem of active vibration control (AVC) of a rectangular flexible plate structure. The plate system was first modeled using Finite Difference (FD) approach. Then, the validity of the obtained model was investigated through comparative studies between the plate natural frequencies predicted by the model and the exact values of resonance modes. A simple regulator with high feedback gain was employed to reduce the unwanted vibration at an observation point. An appropriate value of the feedback gain was acquired through a simulation study. Different types of disturbances were applied to excite the plate system at different excitation points so that the robustness of the proposed control algorithm can be evaluated in terms of its performance in reducing the vibration at observation point. Results of the study clearly demonstrate the effectiveness of the proposed control strategy to attenuate the unwanted vibrations of the flexible thin plate system.