Analytical Design of Coriolis Vibratory Gyroscopes

摘要

In this paper a generalised approach to the analysis of the dynamics and errors of different types of Coriolis Vibratory Gyroscopes (CVG), as well as calculation of their performances for application in the design of such gyroscopes, is considered. In particular dynamics and errors of single mass gyroscopes, for both translational and rotational movement of the sensitive element, is investigated and analysed. Based on the generalised equations, analytical dependencies for basic errors, such as scale factor non-linearity, bias from misalignment between elastic and measurement axes, bias from vibrations and dynamic error caused by harmonic angular rate, are derived and analysed. A methodology for the optimal design of the sense element has been developed and the results applied to the design, fabrication and testing of a micromechanical CVG.