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为了精确地得到列车运行时产生的牵引力,需对列车牵引特性曲线进行拟合。详细阐述移动最小二乘法的基本原理,并以6K型电力机车为例,分别使用分段最小二乘法和移动最小二乘法进行列车牵引特性曲线的拟合,并将拟合的结果进行对比,通过分析误差的大小及曲线的平滑性,表明该方法的优越性和有效性。
In order to get the tractive force produced by the train accurately, the train traction characteristic curve needs to be fitted. The principle of moving least square method is elaborated in detail. Taking 6K electric locomotive as an example, the method of piecewise least squares and moving least squares is used to fit the traction characteristic curves of trains, and the results of the fitting are compared and passed Analysis of the size of the error and the smoothness of the curve, indicating the superiority and effectiveness of the method.