一种提高球载吊篮方位测量精度的校准方法
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摘要
针对球载吊篮方位角的测量问题,给出了一种磁方位传感器的磁偏角补偿及整机校准方法。首先,通过GPS的数据进行动态补偿,降低了因位置变化而导致的磁偏角误差;而对校准方法的描述和分析,明确了校准过程的操作及提高精度的措施,其中介绍的快速解算地球上任意两点连线真方位角的方法则验证了参考点的真方位角数据,提高了校准结果的可信性。校准数据及结果表明,该方法在一定程度上能减小多种因素的影响,提高传感器测量精度,且计算量小并便于算法实现。
In view of the problems of balloon-borne gondola azimuth measurement,a method of magnetic declination compensation and calibration for the magnetic azimuth sensor is proposed.Firstly,the GPS continuously provides the magnetic declination data to compensate the azimuth,which decreases the azimuth errors caused by the movement of gondola.Moreover,the method description and analysis makes the calibration procedure and means to improve the calibration accuracy clear.The method of fast calculating true azimuth of the connecting line between two arbitrary points on the earth is introduced,which verifies the reference direction' s true azimuth data and insures the creditability of the calibration result.The calibration data and result show that this method can decrease the influence of local magnetic filed and installation deviation to some extent,and can improve measurement accuracy of magnetic azimuth sensor,and its algorithm is easy to realize and concise.
In view of the problems of balloon-borne gondola azimuth measurement,a method of magnetic declination compensation and calibration for the magnetic azimuth sensor is proposed.Firstly,the GPS continuously provides the magnetic declination data to compensate the azimuth,which decreases the azimuth errors caused by the movement of gondola.Moreover,the method description and analysis makes the calibration procedure and means to improve the calibration accuracy clear.The method of fast calculating true azimuth of the connecting line between two arbitrary points on the earth is introduced,which verifies the reference direction' s true azimuth data and insures the creditability of the calibration result.The calibration data and result show that this method can decrease the influence of local magnetic filed and installation deviation to some extent,and can improve measurement accuracy of magnetic azimuth sensor,and its algorithm is easy to realize and concise.
引文
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[2]陈文辉,尤文斌,马铁华.地磁方位传感器及其在飞行体姿态测量中的应用[J].弹箭与制导学报,2007(2).
[3]李安生,李振亭.地球基本磁场的形成与变化的探讨[J].地球物理学进展,2007,22(3):750-758.
[4]王月华.地球磁场的全球变化特征[J].地球物理学进展, 1999(3):115-121.
[5]吴玉田,徐学恭,张明东,等.地磁方位标志的稳定性与磁偏角观测精度的研究[J].华北地震科学,2010,28(1).
[6]王瑞,纪兵,边少锋.地面上两点间方位角和距离计算的实用公式[J].海军工程大学学报,2009,21(5):22-26.
[7]王健,李小光,宋利杰.直线坐标方位角的简明计算[J].矿山测量,2010(2):62-65.
[8]易启林,孙毅,李建军.海洋磁力测量中船磁方位改正的基准值确定[J].海洋测绘,2002,22(5):37-39.
[9]汪军.广义罗尔定理及其应用实例[J].辽宁工程技术大学学报(自然科学版),2000(1):93-94.
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