基于BDS/INS动动组合相对定位技术的试验

针对在卫星信号质量较差情况下无法通过观测方程求解模糊度,进而导致无法实时准确测距的问题,提出一种利用惯性信息辅助解算模糊度的方法,即一种将运动载体的惯导信息与相对基线测量信息相结合,实现两运动载体之间精确动态相对定位的算法。通过建立双差载波相位观测方程与惯导观测方程紧组合的方式,分别在共视卫星数目大于4颗和不足4颗条件下求解模糊度未知数。最后,通过搭建组合试验系统平台,利用实地车载试验完成了对组合系统定位精度的测试,结果表明,组合系统定位精度较原先单GNSS定位精度有一定提高。

Move Combination of Relative Positioning Test Based on BDS/INS

Under the condition of the poor quality of the satellite signal, we can not through the observation equation to solve the ambiguity and unable to real-time accurate the distance measurement, so a method using inertial information to calculate the ambiguity is put forward, which is a kind of carrier combined the movement inertial navigation information with the relative baseline measurement information, and then realize the precision dynamic relative positioning algorithm between the two carriers. Through the establishment of double difference carrier phase observation equation and inertial navigation observation equation tight combination, respectively in depending on the number of satellites are more than four and four conditions to solve the ambiguity of unknowns. Finally, through constructing integrated test system platform, the use of field vehicle test completed the positioning accuracy of combination system test, the results show that the combined system positioning accuracy compared with the original single GNSS positioning accuracy must be improved.