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一种适用于光纤捷联罗经寻北的新算法

王宇 程向红 吴峻

王宇, 程向红, 吴峻等 . 一种适用于光纤捷联罗经寻北的新算法[J]. 北京航空航天大学学报, 2012, 38(1): 33-38.
引用本文: 王宇, 程向红, 吴峻等 . 一种适用于光纤捷联罗经寻北的新算法[J]. 北京航空航天大学学报, 2012, 38(1): 33-38.
Wang Yu, Cheng Xianghong, Wu Junet al. New north finding algorithm for strapdown compass based on FOG[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(1): 33-38. (in Chinese)
Citation: Wang Yu, Cheng Xianghong, Wu Junet al. New north finding algorithm for strapdown compass based on FOG[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(1): 33-38. (in Chinese)

一种适用于光纤捷联罗经寻北的新算法

基金项目: 国家科技支持计划重点课题资助项目(2008BAJ11B02); 江苏省博士后科研资助项目(0902012C)
详细信息
  • 中图分类号: U666.1

New north finding algorithm for strapdown compass based on FOG

  • 摘要: 舰船的摇摆使陀螺仪无法测出地球自转角速度(Ω),进而光纤捷联罗经系统无法根据陀螺仪和加速度计的输出直接计算出载体航向.针对这一问题,提出了一种寻北新算法.该算法以"固定"的参考系——惯性坐标系为参考基准,建立了过渡惯性坐标系和初始时刻捷联惯组惯性坐标系,利用加速度计敏感重力加速度在惯性坐标系中的投影计算出Ω的空间指向,得到地理真北.光纤捷联罗经系统寻北算法的实现分解为3个步骤:建立初始时刻捷联惯组惯性坐标系,利用加速度计获得稳定的水平坐标系;根据捷联惯组坐标系与初始时刻捷联惯组惯性坐标系的转换,将加速度计信息投影到初始时刻捷联惯组惯性坐标系,采用空间圆拟合法求出Ω的空间指向;将平行于Ω的矢量向水平面投影得到地理真北.仿真结果表明:载体晃动环境下的寻北精度达到了0.23°(1σ) .

     

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出版历程
  • 收稿日期:  2010-09-02
  • 网络出版日期:  2012-01-30

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