Xi Chongbin, Wang Qi, Nie Xiaoming, Huang Rong, Xiang Zhiyi, Zhou Jian, Jin Shilong
Appl Opt. 2022 Feb 10;61(5):1229-1237. doi: 10.1364/AO.446235.
In the integrated navigation system, which consists of a laser Doppler velocimeter (LDV) and strapdown inertial navigation system, it is necessary to calibrate the LDV. We propose an online calibration method for a LDV based on the strapdown inertial navigation system. This system uses highly accurate output information in the early stage of the inertial navigation system to carry out coarse calibration for the velocimeter and then employs a Kalman filter to correct the results of coarse calibration to achieve high precision calibration for the velocimeter. Experimental results show that the relative distance error of dead reckoning is less than 0.02%, indicating that the proposed online calibration method can achieve high-precision calibration for the velocimeter.
在由激光多普勒测速仪（LDV）和捷联惯性导航系统组成的组合导航系统中，有必要对LDV进行校准。我们提出了一种基于捷联惯性导航系统的LDV在线校准方法。该系统利用惯性导航系统早期的高精度输出信息对测速仪进行粗校准，然后采用卡尔曼滤波器对粗校准结果进行修正，以实现对测速仪的高精度校准。实验结果表明，航位推算的相对距离误差小于0.02%，表明所提出的在线校准方法能够实现对测速仪的高精度校准。
