一种提高球载吊篮方位测量精度的校准方法

A Calibration Method for Improving Measurement Accuracy of Balloon-Borne Gondola Azimuth

中文关键词:  球载吊篮  方位控制  磁方位传感器  磁偏角补偿  校准

英文关键词:balloon-borne gondola  azimuth control  magnetic azimuth sensor  magnetic declination compensation  calibration

中文摘要:

      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。

英文摘要:

      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.