基于MEMS 陀螺辅助增大闭环光纤陀螺动态范围的方法

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

摘要: 闭环光纤陀螺的动态范围随着精度的提高而下降，为了增大闭环光纤陀螺动态范围，提出了一种基于MEMS 陀螺辅助的增大闭环光纤陀螺动态范围的方法，利用MEMS 陀螺量程大的特点，将MEMS 陀螺与光纤陀螺测得的角速率作差，依据该差值判断光纤陀螺工作的干涉级数，从而对光纤陀螺输出加以修正，使光纤陀螺准确工作在多级干涉条纹。仿真表明，提出的方法能够有效的增大闭环光纤陀螺动态范围，提高闭环光纤陀螺的量程。

Abstract: 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.