Synchronization mechanism within the blind zone of the differential resonant accelerometer

Within the range of the differential resonant accelerometer, a blind zone exists that leads to nonlinearity, noise, and zero output, thereby introducing uncertainty and degrading performance. Exploration of the underlying synchronization mechanism leads to an understanding of this uncertainty. In this study, the Huygens pendulum model was employed to explain how both anti-phase and in-phase synchronization coexist and transfer between each other, where jumps occur stemming from the different configurations of the potential wells of the resonator. Noise increase, attributed to phase slip, was observed before and after synchronization, potential to be utilized to detect shocks in the surroundings. Consequently, the entire process of synchronization within the blind zone was verified, and the frequency stability, bias instability and resolution of the accelerometer were greatly improved.