光纤陀螺在实际应用中必须要考虑的一个问题是温度变化速率对其热漂移误差的影响。从理论上分析了温度变化对光纤陀螺热漂移误差的影响。进而设计了一个循环变温实验,得到了光纤陀螺在7种不同变温速率下的热漂移误差大小。根据实验数据,通过选择合适的函数参数,拟合得到了变温速率与光纤陀螺热漂移误差的关系式,并使拟合得到的误差最小。通过该拟合函数,可以得到光纤陀螺在任意变温速率下的热漂移误差大小,并依据拟合的函数参数对光纤陀螺的热性能进行评价。 One problem that fiber optic gyroscopes have to consider in practical applications is the effect of the rate of temperature change on their thermal drift errors. The influence of temperature on the thermal drift error of fiber optic gyroscope is theoretically analyzed. Furthermore, a cyclic temperature change experiment was designed and the error of the thermal drift of the FOG at seven different temperatures was obtained. According to the experimental data, the relationship between the temperature change rate and the thermal drift error of fiber optic gyroscope (FOG) is fitted by selecting suitable function parameters, and the fitting error is minimized. Through this fitting function, the error of thermal drift of FOG at any temperature change rate can be obtained, and the thermal performance of FOG can be evaluated according to the fitted function parameters.