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理论上,采用四极对称法绕制的光纤线圈能很好抑制温度梯度对光纤陀螺的影响,实际上,由于结构加工不理想或石英缠绕引起自身的机械形变,使线圈内外的温度变化,从而导致陀螺输出速率误差。该文分析并给出了光纤陀螺输出速率误差与线圈内外温度差或温度梯度间的关系,提出了一种补偿光纤陀螺因温度变化而导致输出速率漂移误差的方法,尽管光纤陀螺因温度变化所导致的温度漂移不可避免,我们通过测量获取陀螺内部的温度梯度变化并计算出修正系数来对光纤陀螺的输出进行补偿修正,这种方法适合高精度陀螺温度变化较小或是低精度陀螺温度变化较大的情况,这种补偿方法对陀螺系统的硬件要求低,试验结果表明,该补偿方法能有效抑制光纤陀螺随温度变化而导致的漂移速率误差。
In theory, the use of quadrupole symmetry around the optical fiber coil can be very good to inhibit the temperature gradient on the optical fiber gyroscope effect, in fact, due to the structural processing is not ideal or quartz winding mechanical deformation caused by their own, so that the coil inside and outside the temperature change, so Resulting in gyro output rate error. This paper analyzes and gives the relationship between the output error of fiber optic gyro and the temperature difference between inside and outside the coil or temperature gradient and proposes a method to compensate the drift error of the output rate due to the temperature change of the fiber optic gyro. The temperature drift caused by this is unavoidable. We obtain the temperature gradient inside the gyroscope by measuring and calculate the correction coefficient to compensate and correct the output of the fiber optic gyroscope. This method is suitable for the temperature gyroscope with low precision or low temperature gyroscope In larger cases, this compensation method has low hardware requirements for the gyroscope system. The experimental results show that this compensation method can effectively suppress the drift rate error of the fiber optic gyroscope due to temperature changes.