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与腔内运行线偏振光的抖动陀螺相比,腔内运行圆偏振光的零闭锁激光陀螺对磁场更为敏感.为了减小零闭锁激光陀螺的磁敏感性,理论分析了其磁敏感特性.当左、右旋陀螺的比例因子修正相等时,陀螺零偏不随磁场的变化而变化,同时陀螺比例因子线性度也将得到改善.试验测试了零闭锁激光陀螺的磁敏感性,结果表明陀螺存在磁不敏感点.试验结果与理论分析吻合.与传统的被动磁屏蔽方法相比,通过主动控制使得零闭锁激光陀螺工作在磁不敏感点的方法对于降低该陀螺的磁灵敏度和提高准确度具有实用价值.
Compared with the dithering gyroscope, which operates linearly polarized light in the cavity, the zero-latching gyroscope operating with circularly polarized light in the cavity is more sensitive to the magnetic field. In order to reduce the magnetosensitivity of the zero-locked laser gyroscope, the magnetosensitive properties are theoretically analyzed. When the scaling factors of the left and right gyroscopes are equalized, the gyro zero bias does not change with the change of the magnetic field, and the linearity of the gyroscopic scale factor will also be improved. The magnetosensitivity of the zero-locking laser gyroscope is tested and the results show that the gyroscope exists Magnetic insensitive point.The experimental results are in good agreement with the theoretical analysis.Compared with the traditional passive magnetic shielding method, the method of making the zero-locking laser gyroscope work at magnetically insensitive points reduces the magnetic sensitivity and the accuracy of the gyroscope compared with the traditional passive magnetic shielding method Practical value.