以最小二乘法为基础,引入离散的标准正交多项式,使计算过程中不涉及矩阵求逆运算.利用基于标准弹道生成的“外测数据”拟合了主动段弹道,分析了拟合精度并讨论了拟合曲线阶数及分段数对拟合精度的影响.仿真结果表明,根据弹道特性进行适当分段能获得较高的拟合精度,可用于弹道重建. Based on the least square method, a discrete standard orthogonal polynomial is introduced so that matrix inversion is not involved in the calculation process. The projectile trajectory is fitted by using “external measurement data” based on standard trajectory generation, and the fitting accuracy is analyzed The effect of the fitting curve number and the number of segments on the fitting accuracy is discussed.The simulation results show that the fitting accuracy can be obtained by appropriate segmenting according to ballistic characteristics and can be used for ballistic reconstruction.