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中文摘要：
电磁发射过程中，通过磁探针（B-dot探头）阵列输出信号可获得离散的电枢运动的位置／时间关系点，而采用合理拟合方法对离散点进行拟合是获得连续位置／时间曲线的关键，为此提出了三次线性函数拟合法及电流波形拟合法两种拟合方法。拟合结果表明：两种拟合方法均能较好地拟合电枢内膛运动过程，炮口初速均与高速摄像测试结果相符，而适用于任意驱动电流波形的电流波形拟合法算法更优。
英文摘要：
In the launching process, the discrete displacement vs. time diagram can be obtained accor- ding to the outputs of the B-dot probes array, but choosing proper fitting algorithm is the key point to get the displacement vs. time curve, thus cubic linear equation fitting algorithm and current curve fit- ting algorithm are proposed. The fitting results show that the two fitting algorithms can fit the acce- leration process in-bore properly, with both of the muzzle velocities matching the result well provided bY high speed video. However, the current curve fitting algorithm, which is insensitive to the driving current shape, has better performance.
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