基于PSO算法的三轴磁强计总量差校正

摘要

三轴磁通门磁强计在静态磁场的测量中有广泛的应用.由于磁强计轴与轴之间的非理想正交性和标定系数不一致,在测量磁场的模量时会产生总量差.因此要精确的测量磁场的模值,就必须对总量差进行校正.首先分析三轴磁强计测量值与理想值之间的数学关系,推导出误差校正的数学模型.然后提出一种带权重因子的目标函数,并利用PSO算法对误差参数进行求解.最后使用实际测量数据,验证并分析该方法对总量差校正的有效性.%Tri-axial magnetometers are widely used in measurement of static magnetic fields. The diversionary error caused by non-orthogonality and different sensitivities among three axes is sure to reduce the accuracy of tri-axial magnetometers. There-fore , the calibration of the total measuring error is needed for accurately measuring the modulus value. The mathematic relation between the measured value and ideal value of the tri-axial magnetometer is analyzed, and the mathematic model for error correc-tion is deduced. The objective function with weight factors is proposed. The error parameters are calculated with PSO algorithm. Practical measurement data was used to verify the correctness and effectiveness of the method.