Temperature compensation model research on fiber optic gyroscope

The error model of Shupe effect is analysed theoretically,the radial temperature levels of fiber coil will produce the zero bias drift of FOG.The experiment to measure the effect of the ambient temperature on the temperature of the fiber is designed and completed,there is a linear relationship between the change rate of ambient temperature and the error of Shupe effect.Based on the analysis,the experiment to measure the FOG output is designed under the conditions of temperature changing,the gyro output trend is modelled using the first-order、second-order and third-order.The raw data of the gyro output are compensated,the obtained temperature model is verified to set the different temperature curve under the same conditions.The result shows that using the first-order model of temperature changing the error value caused by Shupe effect can be most accurately reflected,comparing with the second-order and third-order model,it is more simple and more stable,and has good compensation effect,and this is also consistent with the conclusions of the theoretical analysis.