Solid-Liquid Triboelectric Nanogenerator based Self-Sensing Vibration Suppression Device

Micro-vibrations adversely affect critical equipment, devices, and systems, resulting in economic losses and safety risks. Hence, the imperative tasks of monitoring and mitigating micro-vibrations present formidable challenges in the field of vibration control. This study introduces a solid-liquid triboelectric nanogenerator (TENG) based self-sensing vibration suppression device (S-L SVD) designed with a vertically structured configuration. This device not only possesses the capability to detect but also effectively reduce vibrations. The S-L SVD consists of an upper self-sensing unit utilizing liquid-silica synergy and a lower damping unit employing magnetic fluid (MF)-permanent magnet synergy. The S-L SVD exhibits a remarkable vibration monitoring sensitivity of 1.9   V/mm, enabling the detection of micro-vibrations with amplitudes as small as 0.368   mm. The self-sensing unit effectively functions as a miniature liquid tuned damper, substantially enhancing the device's damping capability, resulting in a noteworthy 19.6% damping efficiency improvement. Leveraging solid-liquid TENG, the S-L SVD seamlessly integrates vibration monitoring and suppression, showcasing exceptional durability. This innovation not only provides valuable insights into vibration monitoring but also introduces novel approaches for improving damping performance. Furthermore, the device is well-suited for applications in energy-scarce and challenging maintenance environments.