基于光电瞄准/SINS组合的在线修正方法

针对陆战装备捷联惯导系统(strapdown inertial navigation system,SINS)误差的积累性问题,提出了一种光电瞄准解算测速方法,并将其用于SINS主要状态参数的在线修正。推导了光电瞄准速度解算误差模型,误差分析结果表明，光电瞄准解算测速精度满足修正SINS主要状态参数的要求;建立了光电瞄准/SINS在线修正数学模型,并进行了仿真实验,实验结果表明，通过合理设定动基座的运动状态,所提方法可准确估计出SINS的主要误差状态参数,其中失准角的估计精度可达到1′以内,陀螺漂移误差的估计精度可达到0.01°/h。

Method of online correction based on optical targeting

For solving the strapdown inertial navigation system (SINS) error accumulation problem of land combat equipment, a method is proposed for computing the speed using the optical targeting process, which is used for online correction of SINS state parameters. The optical targeting speed error model is deduced, and the error analysis shows that the speed measurement using the optical targeting process meets the accuracy requirements for correcting the main state parameters of the SINS. The optical targeting / SINS mathematical correction model is established, and the simulation experiment is performed. Experimental results show that the proposed method can accurately estimate the main parameters of the SINS error status by setting a reasonable state of motion for the moving base, as the misalignment angle estimation accuracy can reach less than 1 arcmin, and the gyro drift error estimation accuracy can reach 0.01 degree per hour.