Abstract:

In order to calibrate the offset of the magnetic probe position and loop gain of the electromagnetic measurement system in EAST tokamak, the discharge mode of the poloidal field coils is designed through the analysis of the error sources.The measurement data is preprocessed by Green function, then using the simplified Taylor linear expansion ideas, combined with least squares method with weights, the offset of the magnetic probe position and the loop gain is fitted after cycle-iteration. Experimental results show that this calibration method is reasonable.

Key words: Electromagnetic measurement, Error analysis, Green function, Taylor expansion, Least squares

摘要：

为了标定EAST装置电磁测量系统中的磁探针位置偏差和回路增益，通过分析该装置中的误差源，设计了极向场线圈的通电模式。运用格林函数等算法程序对测量数据进行预处理，利用简化的泰勒线性展开，结合带权重的最小二乘法对数据进行多次循环迭代，拟合出磁探针的位置偏差和回路增益。实验结果表明，使用该方法标定是合理的。

关键词: 电磁测量, 误差分析, 格林函数, 泰勒展开, 最小二乘法