首先,以大地测量领域中常用的高斯投影法作为导航坐标系转换基准,并建立了高斯投影算法模型;其次,分析了基于SINS/GPS制导体制的制导弹药常用导航坐标转换算法及其误差;最后,在其基础上提出了一种基于地球模型改进的导航坐标转换算法。仿真结果表明该算法计算量小、可靠性高、转换精度显著高于常用算法,适应于SINS/GPS制导弹药导航坐标转换数学仿真和工程化应用。

First of all, the Gauss projection in the geodetic survey was taken as navigation coordinate transformation datum, the model of Gauss projection algorithm was established. Secondly, the common navigation coordinate transformation algorithm and their errors of guidance munitions based on SINS/GPS were analyzed. Finally, a new coordinate transformation algorithm was obtained from the modified earth model. Simulation shows that the new method not only has less calculation burden and high reliability, but also has higher accuracy than common methods. It is suitable for mathematical simulation and engineering application in SINS/GPS guided munitions.