The Dynamic Characteristics of a Mode-Localized Resonant Accelerometer

This paper investigates the dynamic characteristics of the mode-localized resonant accelerometer (ML-RXL) both in small-signal and large-signal models. The analytical model of ML-RXL bandwidth at various amplitude ratio (AR) operating points (OPs) was derived and validated through simulations and experiments. For the small-signal model, the OP with larger AR results in a further broadening of the ML-RXL’s bandwidth. Specifically, when AR is from 1 to 4, the effective bandwidth is expanded from 46Hz to 152Hz. For large-signal model, this study reveals the emergence of multiple harmonic peaks in the AR output response curve, which become more pronounced as the intensity of the dynamic acceleration signal increases at a given OP. The findings indicate that the bandwidth of ML-RXL is constrained by mode frequency difference and dynamic acceleration signal intensity, and it can be expanded by adjusting the operating point. [2024-0209]