| 三轴磁强计晃动对测量结果的影响分析及校正 |
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| 引用本文： | 林朋飞,林春生,张宁,贾文抖.三轴磁强计晃动对测量结果的影响分析及校正[J].国防科技大学学报,2019,41(6):58-62. |
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| 作者姓名： | 林朋飞 林春生 张宁 贾文抖 |
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| 作者单位： | 海军工程大学兵器工程学院,湖北武汉,430033 |
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| 摘 要： | 三轴磁强计的主要误差有零偏误差、灵敏度误差以及三轴非正交误差。通过在三轴正交坐标体系下对传感器的三轴非正交误差进行分析,建立了传感器误差模型,分析了误差对传感器晃动所产生的影响。晃动1°产生的误差最大可达109.5 nT,晃动误差随着晃动角度的增加而增加。为控制晃动误差,通过对误差模型分析建立误差校正模型,并通过非线性曲线拟合对校正模型参数准确估计,将估计参数代入校正模型,可以实现对传感器输出校正,使其输出误差大大减小,晃动1°产生的误差范围可控制在0.03 nT以内。这表明该校正方法有效地降低了晃动对传感器输出产生的影响。
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| 关 键 词： | 三轴磁强计 晃动 三轴非正交误差 零偏误差 灵敏度 校正 |
| 收稿时间： | 2018/7/6 0:00:00 |
| 修稿时间： | 2018/11/19 0:00:00 |
Analysis of the influence and calibration of tri-axial magnetometer shaking on measurement |
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| LIN Pengfei,LIN Chunsheng,ZHANG Ning and JIA Wendou.Analysis of the influence and calibration of tri-axial magnetometer shaking on measurement[J].Journal of National University of Defense Technology,2019,41(6):58-62. |
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| Authors: | LIN Pengfei LIN Chunsheng ZHANG Ning and JIA Wendou |
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| Affiliation: | Department of Weapon Engineering, Naval University of Engineering, Wuhan 430033, China,Department of Weapon Engineering, Naval University of Engineering, Wuhan 430033, China,Department of Weapon Engineering, Naval University of Engineering, Wuhan 430033, China and Department of Weapon Engineering, Naval University of Engineering, Wuhan 430033, China |
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| Abstract: | The main errors of tri-axial magnetometer include scale deviation error, sensitivity error and tri-axial non-orthogonal error. In this paper, the non-orthogonal error of the sensor is analyzed under tri-axial orthogonal coordinate system. The sensor error model is established, and the influence of error on the shaking of the sensor is analyzed. Shake 1 ° to produce error up to 109.5Nt. After error increases with the increase of the shaking angle. To control the shaking error, calibration model is established, and through the nonlinear curve fitting to estimate the model parameters of the calibration model accurately. After compensation, the sensor output error is greatly reduced, the shaking error can be controlled below 0.03nT. It shows that this method can effectively reduce the influence of shaking on sensor output. |
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| Keywords: | Tri-axial magnetometer shaking tri-axial non-orthogonal scale deviation sensitivity calibration |
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