摘要
为满足列车运行控制及列车定位不同层次的需求,将轨道地图数据分为轨道专用数据、轨道线路数据及地形环境数据,并对轨道地图线路数据按照不同尺度划分为特征点层及插值点层,形成列控轨道地图结构。针对原始GPS地图测量数据,采用多点加权距离检验及Kalman估计差值检验实现错误数据剔除;根据轨道曲线特征对原始数据进行划分,通过在各划分段内动态调整约减限差,选取一定数量的轨道线路特征点在低尺度上实现轨道线路描述;基于所求得特征点,采用三次B样条曲线反算生成拟合曲线,并按照一定的距离分辨率进行等距离插值,在高尺度上细化轨道曲线特性;通过地图数据点里程信息补充,完整实现列控轨道地图数据的生成。青藏线实测数据计算结果表明,该方法计算简单,易于工程实现。
To meet different level requirements of train positioning and control,the track map data for train control consists of private data,track data and terrain environment data,and the track data are divided into feature layer and interpolation layer under different scales,which could contribute to complete structure of the track map.To huge GPS measurements,the multi-points weighted distance discrimination and Kalman estimation are applied to reject incorrect data;with improvement of Douglas-Peucker method,in which the original data are divided as the track curve feature and the limited error is adjusted dynamically,certain feature points are selected to describe the real track under low scale;based on the feature point set,interpolation points are generated by inverse calculation of cubic B-spline curve and equidistance interpolation as certain distance resolution,which could refine the track description under high scale.With the replenishment of mileage information,the generation of track map data could be realized completely.Calculation results with measurement data from Qinghai-Tibet railway show that,the method could meet various requirements of train positioning and control,with simple calculation and engineering realization.
出处
《测绘学报》
EI
CSCD
北大核心
2011年第1期111-117,共7页
Acta Geodaetica et Cartographica Sinica
基金
国家863计划(2009AA11Z221)
国家自然科学基金(60736047
60634010
60870016)
