Method of increasing the dynamic range of closed-loop fiber optic gyroscope based on aided MEMS gyroscope

The dynamic range of closed-loop fiber optic gyroscope (FOG) decreases with the accuracy improvent of FOG improving. Based on aided MEMS gyroscope, a method of increasing the dynamic range of closed-loop FOG was present in this paper. This method makes full use of the large-scale characteristics of MEMS gyroscope. According to the difference of detected angular velocity between MEMS gyroscope and FOG, the interference of series can be judged, which makes FOG work in multistage interference fringe through correcting the output by judging interference of series. The simulation results show that the proposed method can increase the dynamic range of closed-loop FOG effectively.