基于磁梯度张量不变量的系统非对准误差校正

System misalignment error correction based on magnetic gradient tensor invariant

针对工程应用中磁梯度张量系统的测量精度受阵列间非对准误差的严重影响这一问题,提出一种基于磁梯度张量不变量的系统集成校正方法。根据阵列间非对准误差的原理,建立非对准误差模型,且因为磁梯度张量不变量不随坐标系变化而变化的特性,以张量不变量构造目标函数并通过杂交粒子群算法解算误差参数。仿真结果表明,该方法改善率达92.2%,可有效校正阵列非对准误差。实验结果证明了该方法的有效性和正确性,可广泛适用于各种阵列结构的非对准误差校正,具有一定的应用研究价值。

Aiming at the problem that the measurement accuracy of magnetic gradient tensor system in engineering application is seriously affected by the misalignment error between arrays,a system integration correction method based on magnetic gradient tensor invariant is proposed.According to the principle of non-alignment error between arrays,the model of non-alignment error is established,and because the magnetic gradient tensor invariant do not change with the coordinate system,the objective function is constructed with the tensor invariant,and the error parameters are solved by hybrid particle swarm optimization algorithm.Simulation results show that the improved rate of this method is 92.2%,and the array misalignment error can be corrected effectively.Experimental results show that this method is effective and correct,and can be widely used to correct the misalignment errors of various array structures,it has certain application research value.