Magnetic shield design and realization for Zeeman laser gyroscope
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摘要: 为提高塞曼激光陀螺精度，分析了塞曼激光陀螺磁的磁敏感特性，指出敏感轴方向是塞曼激光陀螺的最大磁灵敏度方向，该方向为产生磁误差的主要方向。研究了低频磁场屏蔽理论与加工工艺关键技术，结合激光陀螺的环境适应性要求，实现了固态激光陀螺磁屏蔽结构。在三轴磁试验台上进行了陀螺磁敏感性测试，陀螺磁灵敏度值减少到原来的1/1000，实测系数达到2.0()/(hmT)，该值满足中等精度激光陀螺的实用要求。Abstract: In order to improve the performance of Zeeman laser gyroscope, its magnetic sensitive characteristics were investigated. It was found that the gyro sensitive axis was the most bias magnetic sensitive axis, which resulted in the primary magnetic errors. Based on the low frequency magnetic shield theory and the key processes, the magnetic shield structure adapted to the laser gyro operation environment was manufactured. By testing it in the threeaxis magnetic system, it was found that the magnetic sensitivity of Zeeman laser gyro was decreased to 1/1000 of the original value. The magnetic sensitivity coefficient reached 2.0()/(hmT), which satisfied the requirements of middle precision guidance system.
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Keywords:
- laser gyroscope /
- shield efficiency /
- Zeeman biasing
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