Abstract: The demand for compact and lightweight sensors embedded in micro-vibration isolators in spacecraft is a focus of current research, aiming to effectively detect subtle vibrations of the isolators and warn of potential hazards. A self-sensing micro-vibration isolator based on electret transducer is proposed by using Hamilton’s principle and the theoretical model is established. The coupled dynamics of the system are studied, and guidance is provided for design of the model. In addition, the proposed model is simulated and verified using the finite element method to verify and extend the validity of the model. The results show that the electret transducer is an ideal candidate for embedded sensors in micro-vibration isolators. Through reasonable size design and deployment methods, the electret transducer can accurately detect translational and rotational motion under the load of the isolator. The results provide a theoretical basis for the development of micro-vibration isolators with high sensitivity and integration, demonstrating its broad prospects in space applications.

Key words: electret, micro-vibration, self-sensing, vibration isolators, microgravity space applications