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惯性导航系统是一种全参数、全天候的自主导航系统,但其姿态误差随时间发散。太阳光在大气中传播时在天空具有稳定的偏振模式,惯性/偏振光组合定姿系统就是利用偏振光中的方位信息实现惯性导航系统姿态角误差的估计。研究了惯性/偏振光组合定姿系统模型,利用跑车试验数据对所设计的组合定姿系统进行了仿真。结果表明:惯性导航系统引入偏振光导航信息后,可以有效地抑制惯性导航姿态角误差发散的趋势,提高姿态精度,满足中等精度姿态参考系统的需求。
Inertial navigation system is a full-parameter, all-weather autonomous navigation system, but its attitude error diverges with time. When the sunlight is propagating in the atmosphere, it has a stable polarization mode in the sky. The combined inertial / polarization attitude setting system uses the azimuth information in the polarized light to estimate the attitude angle error of the inertial navigation system. The inertial / polarized combinatorial attitude setting system model is studied, and the test system is used to simulate the combined attitude and attitude system. The results show that inertial navigation system can effectively suppress the divergence of attitude error of inertial navigation, improve attitude accuracy and meet the needs of medium precision attitude reference system after introducing the navigation information of polarized light.