High precision fiber SINS with spin technology

Fiber strapdown inertial navigation system （FSINS） is presently used in several applications related to marine navigation. However, the absolute position from FSINS contains the error that increases with time, which prevents its long-term use for the ship cruise. In order to improve the performance of FSINS based on our present inertial sensors, the spin technology was proposed in the system to mitigate the navigation errors and a prototype of the proposed system was developed in Navigation Lab. The prototype contains the IMU, temperature controller, rotating configuration, navigation and I/O electronics group, control and display, power supply subsystem and other modules. In the proposed spin technology, the IMU is rotated back and forth in azimuth through four orthogonal positions relative to the ship’s longitudinal axis. Experimental testing was conducted for the prototype in the laboratory and the results showed that the RFSINS’s navigation performance is improved 10 times.     

BDS-3 PPP/INS紧组合定位性能分析

随着我国北斗三号全球卫星导航系统(BDS-3)的全面建成，基于BDS-3的高精度定位定姿应用需求日益迫切.推导了无电离层组合模式BDS-3精密单点定位(PPP)模型及地心地固坐标系下的惯性导航系统(INS)误差方程，构建了BDS-3 PPP/INS紧组合定位滤波模型，分别针对BDS-3 PPP、BDS-3 PPP/INS松组合、BDS-3 PPP/INS紧组合三种模式进行了定位性能评估.实验结果表明：BDS-3 PPP/INS松组合与BDS-3 PPP位置精度基本一致；BDS-3 PPP/INS紧组合在东(E)、北(N)、天顶(U)方向位置精度为分别7.9 cm、9.3 cm、9.4 cm，较BDS-3 PPP/INS松组合位置精度分别提升了38.3%、33.1%、35.6%，速度精度分别提升了27.3%、45.8%、12%，姿态精度相当.     

量子导航技术发展现状分析

随着量子信息科学技术的不断发展，量子导航技术以更高的测量精度、更小的设备体积、更广的使用范围得到了国内外的广泛关注，逐渐成为能够升级下一代导航定位核心能力、并有望在2030年前投入使用的新兴技术，是导航定位方向后续发展中具有技术引领作用的核心研发领域.本文梳理了量子导航领域的主要技术、重点发展方向及研究现状，并给出了后续发展建议，以期对量子导航技术发展起到推进作用.