Development of a complete model to evaluate the Zero Rate Level drift over temperature in MEMS Coriolis Vibrating Gyroscopes

This paper presents a comprehensive model to analytically estimate the Zero Rate Level variation over temperature in micro machined Coriolis Vibratory Gyroscopes with associated electronics, with the goal of providing solid guidelines for the development of high stability MEMS Inertial Measurement Units. In fact, ZRL stability over temperature is a key parameter in various applications, especially when the gyroscope output is integrated such as in Pedestrian Dead Reckoning and indoor navigation applications. This paper describes in details the model developed, underlines design trade-offs and shows the good agreement between model predictions and experimental results on one available device.