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高效率和高精度的列车定位方法是列车运行控制系统的核心。针对单一的地图匹配方法存在定位精度不高、可靠性差的问题,并提出了基于三次B样条曲线拟合的列车运行综合地图匹配方法。根据哈尔滨西至长春铁路线的实测数据,首先利用三次B样条曲线拟合的方法确定列车的行驶路线,其次利用变步长复化辛普森公式计算列车的运行位置,最后与最小二乘曲线拟合列车定位方法进行了对比。实验结果表明,三次B样条曲线拟合法的稳定性和精确性更高,可以满足时速200 km/h的高速列车定位系统的要求,并且残差控制在-4.262~5.911的范围内。
High-efficiency and high-precision train positioning method is the core of train operation control system. Aiming at the problem that the single map matching method has poor positioning accuracy and poor reliability, a comprehensive train matching map matching method based on cubic B-spline curve fitting is proposed. According to the measured data of Harbin-West-Changchun railway line, the driving route of the train is determined by cubic B-spline curve fitting method. Secondly, the running position of the train is calculated by the variable step size Simpson formula. Finally, A comparison of train positioning methods. The experimental results show that the cubic B-spline curve fitting method is more stable and accurate, which can meet the requirements of high-speed train positioning system with a speed of 200 km / h and the residual control is in the range of -4.262 ~ 5.911.