【摘要】 现有惯性导航系统机械编排在极区(特别是地理极点附近)不适用。针对该问题,提出了适用于捷联惯性导航系统极区使用的横坐标系导航方法。构建出横坐标系参考框架,推导出横坐标系和常规坐标系之间位置、速度和姿态信息的转换关系,建立了横坐标系捷联惯导系统的机械编排,并在此基础上分析其误差传播特性。仿真分析表明:横坐标系可以解决采用现有机械编排时,极区经线圈快速汇聚和地理极点附近无北向基准所引起的问题,从而满足极区导航要求;同时,仿真结果验证了横坐标系捷联惯导系统中位置和航向误差漂移的特性。更多还原

【Abstract】 The present mechanizations of inertial navigation system are not suitable for use in polar region, especially at near the geography polar. To solve this problem, a navigation method based on transversal frame is proposed for strapdown inertial navigation system in polar region. The navigation reference framework of the transversal frame is constructed. The parameter transformations from a transversal frame system to a normal system for position, velocity and attitude are deduced. Moreover, the mechanization based on transversal frame for strapdown inertial navigation system is established, and its error propagation characteristics are analyzed. The simulation and analysis results show that this method could solve the problem that longitude circles converges fast in polar region and the north benchmark is invalid, so it can satisfy the requirements of polar navigation. Meanwhile, the simulation results also demonstrate that the yaw and position errors drift with time in the transversal frame of strapdown inertial navigation system.更多还原