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高旋弹丸背景涡流磁场建模与补偿

DOI: 10.3969/j.issn.1006??7043.201211015??

Keywords: 高旋弹丸, 涡流磁场, 姿态测量, 数学建模, 半实物实验??

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Abstract:

为了实现高旋弹体姿态的高精度测量,对弹丸背景涡流磁场进行了理论研究和数学建模。基于等效线圈的思想推导了涡流磁场的单轴感应模型和三轴等效磁偶极子物理模型。利用磁矩在空间中的磁感应强度分布理论,建立了三轴耦合涡流磁场的数学模型,给出了涡流参数的表达式。结合误差传递的思想分析了涡流磁场引起的姿态测量误差,进行了数值仿真与半实物实验研究。结果表明:利用提出的涡流磁场模型进行补偿后的地磁分量测量误差小于??0.01 A/m??,补偿后的姿态角解算误差在±1°以内。为了满足高精度弹丸姿态测量的要求,必须要对涡流干扰磁场进行补偿。

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