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| 光纤陀螺结构细分及材料优选 |
| Subdivision of fiber optic gyroscope structure and optimization of materials |
| 投稿时间：2014-07-01 |
| DOI：10.3969/j.issn.1005-5630.2015.01.018 |
| 中文关键词: 光纤陀螺 有限元 结构材料 温度性能 动态性能 |
| 英文关键词:fiber optic gyroscope(FOG) finite element structural materials temperature performance dynamic output precision |
| 基金项目: |
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| 中文摘要: |
| 介绍了温度场和应力引起光纤陀螺误差的机理,通过对光纤陀螺的结构细分,采用不同材料分别建立有限元模型,进行模态分析、热应力分析和瞬态温度分析,选取具有代表性的新型材料铍铝合金和因瓦合金与传统铝合金进行对比。结果表明,铍铝合金可以提高光纤陀螺的固有频率,同时提高光纤陀螺的温度性能,因瓦合金可以大幅度降低光纤陀螺光纤线圈的应力变化,将光纤陀螺结构细分,进行材料优选,可以显著提高光纤陀螺的温度性能和动态输出精度,并得到试验论证。 |
| 英文摘要: |
| This paper introduces fiber optic gyroscope (FOG) error caused by the temperature field and stress. Through the subdivision of FOG structure, finite element models for different materials were established. Thermal stress analysis and transient temperature analysis were carried out. We select a representative of the new material beryllium aluminum alloy and invar alloy and compare them with the conventional aluminum alloy. The results show that the use of beryllium aluminum alloy can increase the frequency of the FOG, while increasing the temperature performance of FOG. Invar alloy can greatly reduce the influence of the stress change of the optical fiber coil. The subdivision of FOG structure with the optimization of materials can significantly improve the temperature performance and precision of dynamic output of FOG, which is proven in the experimental test. |
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