液力传动轨道车发动机特性曲线拟合方法比较

Comparisons of Engine Performance Curve Fitting Method to Hydraulic Drive Railway Trolley

通过实例对发动机特性曲线的拟合方法进行比较,阐明了利用线性回归法、3点拉格朗日插值多项式法和利用EXCEL电子表格自带的多项式函数拟合发动机特性曲线的异同,并推荐了适合一般液力传动轨道车辆发动机特性曲线的拟合方法。

In this paper, the comparisons engine performance curve fitting method is made by the given instances.The similarities and differences of engine performance curve which are fitted by Simple Linear Regression, Lagrange Interpolating Polynomial for 3 points and Polynomial Function attached to Excel sheet are set forth. The performance curve fitting methods of engine is suitable to hydraulic drive railway trolley.