Turn-on bias behavior prediction for micromachined Coriolis vibratory gyroscopes

The turn-on bias behaviour of a Coriolis vibratory gyroscope (MCVG) is theoretically modelled, numerically simulated and experimentally verified in this paper. First, the bias-temperature relationship during the thermal start-up process is analytically established. Second, the bias-time characteristic is modelled by analyses of different transient responses via different pathways in the heat transfer process. Finally, an experimental verification method is proposed to verify the established turn-on bias model. The comparison proves the established model can predict the turn-on bias behaviour of MCVGs with an acceptable error of 9%.