SDS-TWR无线测距在城轨列车防撞系统中的应用研究

Feasibility analysis of SDS-TWR ranging in collision avoidance system of urban rail train

城轨列车在ATP失效模式下的防撞保护是保证列车安全运行的重要手段.基于SDS-TWR的无线测距方法能够提供良好的测距精度和测距距离.本文结合SDS-TWR原理,对城轨列车在高速移动、坡道、弯道及隧道环境等路况条件下的无线测距进行了建模分析,同时给出了分析方法和计算结果.最后以城轨列车防撞预警系统为例证明了将SDS-TWR应用于复杂环境下测距的可行性.

Collision avoidance system is very import for urban rail train in ATP failure mode. The ranging method based on SDS-TWR can provide excellent range accuracy and distance. This paper provides the modeling analysis combined with SDS-TWR principle for this wireless ranging method applied in the environments of fast-moving,ramps,curves and complex tunnel. In the meantime,the analysismethods and calculation results are given. Finally,the case of urban rail train collision warning system proves the feasibility of the SDS-TWR used in the complex environments ranging.