分光再利用型激光多普勒测速仪及其与捷联惯导组合导航.pdf

第 22 卷第 4 期 中国惯性技术学报 Vol.22 No.4 2014 年 8 月 Journal of Chinese Inertial Technology Aug. 2014 文章编号：1005-6734(2014)04-0510-04 doi: 10.13695/ki.12-1222/o3.2014.04.016 分光再利用型激光多普勒测速仪及其与捷联惯导组合导航 聂晓明，周 健，魏 国，龙兴武 （国防科学技术大学光电科学与工程学院，长沙 410073 ） 摘要：为了抑制惯性导航系统的误差累积效应，提出了用激光多普勒测速仪与捷联惯导进行组合。基 于分光再利用的思想设计了新型光路结构的激光多普勒测速仪，并详细讨论了激光测速仪与捷联惯导 组合进行航迹推算的过程。理论分析和实验结果表明，分光再利用型激光多普勒测速仪测量精度高、 数据有效性及稳定性好，将其用于车载惯性导航系统大大提高了导航精度，位置误差由纯捷联惯导2 h 1166 m 提高到组合系统2 h 20 m 。 关 键 词：激光多普勒测速仪；捷联惯导；分光再利用；航迹推算 中图分类号：TN249 文献标志码：A Split-reuse type laser Doppler velocimeter and its integrated navigation with strapdown inertial navigation NIE Xiao-ming, ZHOU Jian, WEI Guo, LONG Xing-wu (College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China) Abstract: In order to suppress the error accumulative effect of INS(inertial navigation system), an idea of building an integrated navigation system using laser Doppler velocimeter(LDV) together with strapdown inertial navigation is proposed. A novel LDV with advanced optical structure is designed based on split-reuse technique. And the process of dead-reckoning using LDV and strapdown inertial navigation is discussed. The results of theory and experiment show that the accuracy, data validity and stability of the split-reuse type LDV are excellent, which can significantly improve the positioning accuracy of the vehicle navigation system. The position error of 2 h 1166 m with the pure strapdown inertial navigation is decreased to 2 h 20 m by using the int