| 引用本文: | 林朋飞,林春生,张宁,等.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.[点击复制] |
| LIN Pengfei,LIN Chunsheng,ZHANG Ning,et al.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[点击复制] |
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| 三轴磁强计晃动对测量结果的影响分析及校正 |
| 林朋飞,林春生,张宁,贾文抖 |
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(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。 |
| 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 |
| DOI：10.11887/j.cn.201906009 |
| 投稿日期：2018-07-06 |
| 基金项目: |
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| Analysis of the influence and calibration of tri-axial magnetometer shaking on measurement |
| LIN Pengfei, LIN Chunsheng, ZHANG Ning, JIA Wendou |
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(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. The non-orthogonal error of the sensor was analyzed under tri-axial orthogonal coordinate system. The sensor error model was established, and the influence of error on the shaking of the sensor was analyzed. Shake 1° to produce the error up to 109.5 nT, the error increases with the increase of the shaking angle. To control the shaking error, the calibration model was established, and through the nonlinear curve fitting to estimate the model parameters of the calibration model accurately. After compensation, the sensor output error was greatly reduced, and the shaking error can be controlled below 0.03 nT, which shows that this method can effectively reduce the influence of shaking on sensor output. |
| Keywords: tri-axial magnetometer shaking tri-axial non-orthogonal scale deviation sensitivity calibration |
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