【摘要】 通过理论分析和仿真实验详细比较了两种地磁场辅助惯性导航方案各自的优势和不足。第一种方案采用了传统的方式,仅把地磁场强度当做标量使用。而另外一种方案采用了磁场矢量分解的方法,并选取了2个磁场分量用于匹配。通过局部能观性理论对两种导航方案的数学模型进行了分析,证明了第二种方案对磁场曲面形态的适应性更强,但其缺陷是对载体的平台误差角比较敏感。最后的仿真实验进一步印证了本文的分析结果。更多还原

【Abstract】 Two types of geomagnetic navigation schemes are proposed and compared based on theoretical analysis and simulation test.One takes the geomagnetic field as scalar in traditional way while the other decomposes the geomagnetic vector and chooses two components to perform map matching.Advantages and drawbacks of the both systems are compared.The local observability theory is used to analyz the mathe matical modele of the two navigation schemes.The second one is proved to be more adaptive to geomagnetic surface shapes and sensitive to carrier attitude errors.The simulation results verify the theoretical analysis.更多还原