论文部分内容阅读
为解决地磁导航中电气设备所产生的低频干扰磁场对导航系统所产生的不利影响,针对磁场干扰方向时变所导致的非线性叠加问题,提出了将干扰电路的各个支路根据电流变化特性分组划分成不同干扰源的办法,以确保各干扰源产生方向固定的干扰场.并对载体的运动姿态提出了要求,从而建立了磁场信号的线性化叠加模型.针对独立特征量分析法固有的幅值与顺序模糊性缺陷,提出采用相关系数的绝对值来进行搜索匹配定位.理论分析与仿真实验证明了本方案可有效分离出地磁信号的波形并进行精准匹配.
In order to solve the adverse effect of the low-frequency interference magnetic field generated by the electrical equipment in the geomagnetic navigation on the navigation system, aiming at the nonlinear superposition problem caused by the time-varying magnetic field disturbance, the proposed method is to divide each branch of the interference circuit into groups according to the current variation characteristics Divided into different sources of interference in order to ensure that the sources of interference to produce a fixed direction of the interference field.And the attitude of the carrier put forward the requirements of the magnetic field signal to establish a linear superposition model for the independent characteristic of the intrinsic amplitude analysis method Value and sequence fuzziness, the paper proposes to use the absolute value of the correlation coefficient to search for the matching location. The theoretical analysis and simulation results show that this scheme can effectively separate the geomagnetic signal waveform and perform accurate matching.