基于共轭次梯度法的非理想正交三轴磁传感器的修正

Correction of Incompletely Orthogonal Three Axial Magnetic Sensorby Conjugated Approximate Gradient Algorithm

磁测量中三轴磁传感器的三轴不可能绝对正交 ,这使得高分辨率测量受到限制。本文提出了一种可以不考虑实时性的对非正交参数修正的方法 ,构造了目标函数 ,并根据传统的共轭梯度法构造了共轭次梯度法用于寻找最优非正交参数 ,仿真结果表明这种方法可以稳定收敛并可以达到较高的精度。

In the magnetic measurement, as a result of the restriction, it is impossible that the three axial magnetic sensor are completely orthogonal, and the measure result is restricted. This makes magnetic measurement of high resolution hard. A method for correction of incompletely orthogonal parameters is presented. The method does not consider real time ability. A new target function is constructed. According to the traditional conjugated gradient algorithm, a conjugated approximate gradient algorithm is introduced to optimize the incompletely orthogonal parameters. Simulational result indicates that the method can get stable convergence and high precision.