激光陀螺测角仪测角误差来源研究

激光陀螺动态测角仪是近几十年来发展起来的高精度、高灵敏度的动态测角系统。为了充分利用激光陀螺高精度的优良性能来提高角度测量的精度,对激光陀螺测角仪系统的结构和工作原理进行了介绍,综合国内外文献中对各主要误差源进行了定性的分析,估算了各误差的大小,由此得到了系统总的测角不确定度约为0.3'。结果表明,量化误差对测角精度影响较大。这一结果对探索进一步提高系统精度的方法具有指导性的作用。

Study on error sources of angle measurement with dynamic ring laser goniometers

With decades of development, a dynamic ring laser goniometer (DLG) becomes a kind of dynamic angle measuring system with high precision and sensitivity. The structure and principle of DLG system were introduced. In order to increase the accuracy of angle measurement and make the best use of the ring laser gyro, the major errors were analyzed qualitatively and calculated quantificationally, and the total angle measure uncertainty of the system was about 0.3″. The result shows that the quantization error will influence the accuracy of angle measurement significantly, and it’s instructive to find the methods to increase the angle measuring accuracy further.