一维激光多普勒测速仪/单轴旋转惯导组合车载高程测量方法(特邀)

Height measurement method based on one-dimensional laser Doppler velocimeter and integrated navigation system of single-axis rotation inertial navigation system(invited)

采用一维激光多普勒测速仪与单轴旋转惯性导航系统组合的方式,利用单轴旋转惯导系统倾角补偿后的姿态输出为测速仪提供高精度姿态基准,探索提高一维激光测速仪高程测量精度的新方法。针对双光束差动结构的一维激光测速仪高程测量原理及单轴旋转惯导系统倾角误差补偿方法进行了研究,以车载的方式对设计的高程测量方法进行了试验验证。完成了两组35~40min跑车测试,第一组试验高程测量最大误差为-2.67m,标准差为1.0094m;第二组试验高程测量的最大误差为1.68m,标准差为0.5880m,达到了车载情况下连续动态高程测量精度优于3m的预期指标。相关试验结果证明了基于单轴旋转惯性导航系统的车载一维激光多普勒测速仪高程测量方法的有效性。

A new method to improve the height measurement accuracy of the integrated navigation system of one-dimensional laser Doppler velocimeter(LDV)and single-axis rotation inertial navigation system(INS)is explored in this paper.The attitude output after base tilt compensation of the single-axis rotation INS is used to provide a high-precision attitude reference for the LDV.The height measurement principle of the one-dimensional LDV with dual-beam differential structure is studied,and the base tilt compensation method of single-axis rotation INS is analyzed.On the basis of theoretical analysis,on-vehicle experiments are carried out to verify the effectiveness of the designed height measurement method.Two groups of 35-40 min on-vehicle tests are completed.The maximum error of height measurement in the first group is-2.67m,and the standard deviation is 1.0094m;The maximum error of the second group of height measurement is 1.68 m,and the standard deviation is 0.5880m,reaching the expected target that the continuous dynamic height measurement accuracy is better than 3m under the vehicle condition.The related research proves the effectiveness of the height measurement method based on integrated navigation system of single-axis rotation INS and one-dimensional LDV.