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初级教练机中的低成本导航仪组合导航算法设计

, PP. 1263-1268

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Abstract:

为了解决初级教练机低成本组合导航仪中全球定位系统(GPS,GlobalPositioningSystem)信息更新频率过低,导致传统组合导航算法失效的问题,在对惯性器件进行建模的基础上,提出了一种基于运动学非线性模型的组合导航算法.该算法选取载体的姿态、速度和位移量作为状态量,以GPS、磁强计和高度计的测量值作为观测量,建立组合导航系统模型,利用卡尔曼滤波对线性化后的系统模型进行数据融合.通过静态试验和动态跑车试验,表明该组合导航算法能够使姿态误差均值控制在0.12°以内,速度误差均值不大于0.03m/s,位移量误差均值不大于3.94m,精度能够满足初级教练机的应用需要.

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