机抖激光陀螺抖频匹配技术的优化

发布时间：2018-01-30 22:03

本文关键词： 激光光学机抖激光陀螺捷联惯导系统伪圆锥运动抖频匹配频率调谐　出处：《中国激光》2016年10期 　论文类型：期刊论文

【摘要】：在机抖激光陀螺(DRLG)捷联惯导系统(SINS)中,陀螺的抖动偏频会引起伪圆锥运动。分析了伪圆锥运动对捷联惯导系统旋转矢量计算的影响,并推导了其表达式。通过数值计算,分析了影响伪圆锥误差的因素,提出了机抖激光陀螺抖动频差的匹配原则,以实现伪圆锥误差最小化。基于该匹配原则,面向工程实际问题提出了一种机抖激光陀螺抖频调谐技术。仿真分析和实验结果表明,选用一种主体抖动轮并按需选配调节构件,该技术可满足系统对陀螺抖动频差的匹配要求,同时不会对陀螺整体外形尺寸和抗振性能造成任何影响。与传统方案相比,进一步提升了机抖激光陀螺,尤其是小型化机抖激光陀螺的工程化水平,降低了生产成本。
[Abstract]:In the strapdown inertial navigation system (sins) of dithered laser gyroscope (DRLG), the frequency bias of gyroscope will cause pseudo cone motion. The effect of pseudo cone motion on rotation vector calculation of sins is analyzed. Through numerical calculation, the factors that affect the error of pseudo cone are analyzed, and the matching principle of dither frequency difference is put forward to minimize the error of pseudo cone. Aiming at practical engineering problems, a tuning technique of dithered laser gyroscope is proposed. Simulation analysis and experimental results show that a kind of main jitter wheel is selected and the adjusting components are selected as needed. This technique can meet the requirement of the system matching the dither frequency difference of the gyro, and at the same time, it will not have any influence on the overall size and antivibration performance of the gyroscope. Compared with the traditional scheme, it can further improve the dithered laser gyroscope. In particular, the engineering level of the miniature dithered laser gyroscope reduces the production cost.
【作者单位】：西北工业大学自动化学院;中航工业西安飞行自动控制研究所;
【基金】：装备预先研究项目(51309010202)
【分类号】：TN96
【正文快照】： 基于Sagnac效应[1]的激光陀螺结构简单、体积小、质量轻、精度高,作为新一代惯性传感器,是目前激光捷联惯导系统(SINS)的首选,在海、陆、空、天等领域获得越来越广泛的应用[2]。闭锁效应[3-4]是激光陀螺的主要误差因素之一,必须采取偏频技术克服锁区对激光陀螺的影响。机抖偏

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