基于电子罗盘的快速粗定向方法研究

为满足机械陀螺仪快速定向要求,采用一种基于电子罗盘的快速粗定向方法;根据电子罗盘的地磁场测量原理,分析了其测量的干扰和误差因素;通过对电子罗盘干扰抑制及误差补偿处理方法的研究,综合采用软件滤波与基于椭圆拟合的罗差补偿法对采样数据进行处理及仿真;实验表明,该方法误差校正效果明显,设计精度可达1°,精度可满足机械陀螺仪粗寻北要求,寻北周期50″左右,满足设计要求。

Method Research of Quickly Coarse Orientation Based on Electronic Box and Needle

To meet the quick orientation demand of the automatization of gyro-scope,a method of quickly coarse orientation based on electronic box and needle is presented.According to the principle of measuring magnetic field though electronic box and needle,the interferences and errors of measurement is analyzed.through the method research of anti-jamming and error compensation on electronic box and needle,the software filter and the method of ellipse fitting based on error compensation algorithm are used in the processing and simulation of the collected data.Experiment shows that the performance of this fitting method is satisfied in the compensation,the coarse orientation precision is 1°which meets demand of the automatization of gyro-scope,the cycle of north-finding is about 50″which reach the requirement of the design.