Dynamics of the Ring Micromechanical Gyroscope Taking into Account the Nonlinear Stiffness of the Suspension

Маслов, А. А.; Maslov, D. A.; Merkuryev, I. V.; Podalkov, V. V.

doi:10.23919/icins.2019.8769369

Cited by 3 publications

(1 citation statement)

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“…The device vibration is mostly linear at normally used levels, however, the nonlinear jump that occurs at higher vibration level will restrict the application of ring gyroscope in higher requirements [4]. Some researchers focus on modelling of nonlinearities and control of nonlinear vibration [23][24][25][26][27][28]. On the other hand, much work has been done in decoupling the drive and sense modes, in order to minimize the quadrature error.…”

Section: Introductionmentioning

confidence: 99%

Micromachined Vibrating Ring Gyroscope Architecture with High-Linearity, Low Quadrature Error and Improved Mode Ordering

Gao

Jin

et al. 2020

Sensors

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A new micromachined vibrating ring gyroscope (VRG) architecture with low quadrature error and high-linearity is proposed, which successfully optimizes the working modes to first order resonance mode of the structure. The improved mode ordering can significantly reduce the vibration sensitivity of the device by adopting the hinge-frame mechanism. The frequency difference ratio is introduced to represent the optimization effect of modal characteristic. Furthermore, the influence of the structural parameters of hinge-frame mechanism on frequency difference ratio is clarified through analysis of related factors, which contributes to a more effective design of hinge-frame structure. The designed VRG architecture accomplishes the goal of high-linearity by using combination hinge and variable-area capacitance strategy, in contrast to the conventional approach via variable-separation drive/sense strategy. Finally, finite element method (FEM) simulations are carried out to investigate the stiffness, modal analysis, linearity, and decoupling characteristics of the design. The simulation results are sufficiently in agreement with theoretical calculations. Meanwhile, the hinge-frame mechanism can be widely applied in other existing ring gyroscopes, and the new design provides a path towards ultra-high performance for VRG.

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