一种新型的磁定向系统及其定向算法研究

摘要

为了提高基于地磁检测的定向精度,通过引入高精度步进电机控制,设计了一种新型的平面单轴磁定向系统.该系统仅需要一个磁性传感器输出信号,通过步进电机带动磁传感器在水平面内做等间隔转动,求取最大值位置以确定磁方位.针对干扰和测试噪声的影响,研究了基于遗传算法和最优化理论的混合数据处理方法.通过对测试数据正弦曲线的四参数拟合,获取初始相位,提高了测角精度.仿真研究和工程实验表明:该定向方法有着较高的精度和较好的稳定性.%In order to improve the accuracy, a new magnetic direction finding system is designed through adopting high precise stepper motor. The system only needs one GMR magnetic sensor' s output. The magnetic sensor rotates with the stepper motor in the horizon plane. Through calculating the position of maximum output, the magnetic bearing can be determined. Considering about the influence of interference and test noise, hybrid data processing method based on genetic algorithm and optimization theory is researched. Through fitting the four parameters of the sine wave to the test signal,the initial phase is obtained and then improves the accuracy. Simulation research and engineering experiment prove that the direction finding method is well accurate and stable.