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本文就H_0、H_2、V_0、V_2均为常数的有界枕形场、桶形场及其混合场进行了计算和分析,发现H_2、V_2与各种会聚误差具有良好的线性关系,因而只要很少几次计算,就能对这种理想场分布的会聚误差有一个全面的了解,并可以方便地求出消除某种误差所应选取的H_2、V_2值以及使各种会聚误差趋于最小的最优化值。由于采用龙盖、库塔法从轨迹方程直接求解,故适用于大偏转角情况。所设计的电子计算机程序能给出空间电子轨迹、平面屏、柱面屏、球面屏上的落点坐标及会聚误差的大小,并用宽行表格打印出来。
In this paper, we calculated and analyzed the bounding box-shaped field, the barrel-shaped field and the mixed field with constant H_0, H_2, V_0 and V_2, and found that H_2 and V_2 have a good linear relationship with various convergence errors. Therefore, After a few calculations, we can have a comprehensive understanding of the convergence error of this ideal field distribution, and we can conveniently find the values of H_2 and V_2 which should be selected to eliminate some error and minimize the convergence errors Optimization value. Due to the use of lid, Kutta method directly solved from the trajectory equation, it is suitable for large deflection angle. The designed computer program can give the space electronic trajectory, plane screen, cylinder screen, the coordinates of the falling point of the spherical screen and the size of the convergence error, and print it in a wide line form.