磁罗盘误差校准方法及其在海洋领域的应用

Error Calibration Method of Magnetic Compass and its Application in Marine Field 430076,China)

摘要:

针对磁罗盘自身误差以及载体平台磁干扰导致磁罗盘测量精度不高的问题，提出了一种磁罗盘误差校准方法。通过对磁罗盘自身误差以及载体平台磁干扰产生的误差进行分析，建立了误差校准模型，并结合实际应用条件给出了磁罗盘平面校准方法和空间校准方法，采用最小二乘回归算法对模型求解，解决了磁罗盘现场校准问题。利用所研制的磁罗盘开展了施加磁干扰后的磁罗盘校准验证实验，并对校准前后的方位角精度进行了测试。试验结果表明：在施加磁干扰后方位角最大误差 12°的条件下，利用该方法校准后方位角最大误差仅为 0.2°， 说明了该方法的有效性。最后，介绍了磁罗盘在海洋领域常见的几种应用。

Abstract:

Aiming at the problem of low measurement accuracy of magnetic compass caused by its own error and magnetic interference of the carrier platform，a magnetic compass error calibration method has been proposed. By analyzing the error of the magnetic compass itself and the error caused by the magnetic interference of the carrier platform，the error calibration model has been established. Combined with the practical application conditions，the plane calibration method and space calibration method of the magnetic compass are given. The Ordinary Least Squares Regression(OLS)algorithm is used for model solution，which can also solve the on-site calibration problem of the magnetic compass. Using the developed magnetic compass，the calibration verification experiment of magnetic compass with magnetic interference has been carried out，and the azimuth accuracy before and after calibration has been tested. The experimental results show that when the maximum azimuth error is 12 ° with magnetic interference， this method can calibrate that maximum azimuth error to be only 0.2 °，which shows the effectiveness of this method. Finally，several common applications of the magnetic compass in marine field have been introduced.