Macro fiber composite-based active and efficient suppression of low-frequency vibration of thin-walled composite beam

Low-frequency vibration of thin-walled materials, which are widely used in aircrafts, can lead to fatal damage of aircraft components and even serious accidents. Efficient suppression of such low-frequency vibration is a promising way to avoid the above issue. Here, we propose a macro fiber composite (MFC) based self-feedback system for active suppression of low-frequency vibration of thin-walled composite beams, taking advantage of the excellent sensing and actuating features of MFCs. The self-feedback system composed of two MFCs, which were attached on the upper and lower surface of the thin-walled composite beams. One of the MFCs acted as sensors for continuously sensing the vibration signals and the other one was utilized to generate inverse vibration to efficiently suppress the detected vibration. The vibration suppression ratio could reach to 82.09% at the resonant frequency of 67 Hz. Importantly, the bandwidth with more than 50% vibration suppression ratio was about 52 Hz. Our proposed design could be suitable for various thin-walled materials, such as carbon fiber plate, epoxy plate, and steel plate, opening up a new avenue for active and efficient suppression of low-frequency vibration.

Automated summary

In this study, a self-feedback system based on MFCs was proposed for the active suppression of low-frequency vibration in thin-walled composite beams. By continuously sensing the vibration signals and generating inverse vibration, the system achieved a vibration suppression ratio of up to 82.09% at the resonant frequency.