捷联航姿传感器的误差补偿标定方法

An Error Demarcated Method and Experiment of Strap-down Navigation Attitude

摘要:

磁航向传感器作为机载设备,它的工作情况与载体环境的影响有着密切的关系,测得的磁航向角存在着较大的误差,不能直接用来进行导航定位。所以,必须对其进行误差补偿,提高磁航向角的测量精度,才能用于导航定位。罗差是磁阻罗盘的主要误差源,文中介绍了罗差方程式,并重点推导了基于最小二乘法的七参数八位置误差标定方法。基于该方法的磁航向补偿算法的性能试验结果证明,磁航向误差基本维持在0.5°左右,满足了精度的要求。

Abstract:

The operation of magnetic course sensor which works as one airborne equipment is tightly related with the effect of carrier environment, because there is larger error in the measured magnetic course angle, the magnetic course sensor can not be used directly in navigation and position. Therefore, this sensor must be compensated to improve the measured accuracy of magnetic course angle when it is used in navigation. The magnetic resistance box and needle is one import magnetic course sensor, of which the magnetic deviation is main error. In the basis of magnetic deviation equation is introduced, the error demarcated method based on LS is mainly deduced by the way of seven parameters and eight positions. The experiment results of this compensated algorithm based on the proposed method proves that the error of magnetic course maintains within 0.5°, thus this proposed method can meet the need of accuracy.