Evaluation of Angle Measurement Uncertainty of Fiber Optic Gyroscope Based on Monte Carlo Method

Research on the transfer and traceability of a dynamic angle has great value in the field of measurement. The fiber optic gyroscope (FOG), as a high-precision angular velocity sensor, has broad prospects in this application. The focus of this article is the evaluation of angle measurement uncertainty of the FOG based on the Monte Carlo method (MCM). The angle measurement uncertainty evaluation model is established based on the principle of the FOG, and the simulation is carried out in detail based on the model and MCM. Finally, the angle measurement experiments of the FOG are carried out in the National Institute of Metrology, China. The experimental results show that the angle measurement uncertainty within the range of 360° is about 0.96
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in a relatively stable environment when the confidence probability is 95%. It is highly consistent with the simulation, which confirms the accuracy of the evaluation model and the effectiveness of MCM.