摘要
[目的]虚拟编组技术对列车定位精度和准确性的要求极高,传统定位技术手段难以满足虚拟编组SIL4(安全完整性等级为4级)的安全需求,因此有必要对定位算法进一步研究,估算出更加精确的定位误差包络,缩短虚拟编组追车距离,提高编组安全性。[方法]基于传统列车定位技术,将定位过程拆分为列车测速、测距与初始定位3个部分,基于定位过程各部分中所存在的误差因素,提出一种新的列车定位误差包络计算方法,采用数理推导的方式,分别对各类误差因素进行推导计算,得到定位过程各部分的上下界包络。[结果及结论]所提方法充分考虑了列车测速、测距与初始定位中的误差因素,使得定位误差上下界包络更加精确,降低传统定位误差计算的保守性,同时所提方法能够满足SIL4要求,满足虚拟编组控制系统在近距离追车场景下的安全需求,并进一步缩短追车距离,提高运输效率。
[Objective]Virtual marshalling technology requires high precision and accuracy of train positioning,and traditional train positioning technologies are unable to meet the safety requirements of the virtual marshalling SIL4.Therefore,it is necessary to further study the positioning algorithm,estimate more accurate positioning error envelope,and shorten the train chasing distance in virtual marshalling to improve the marshalling safety.[Method]Traditional train positioning technologies divide the positioning process into train speed measuring,distance measuring and initial positioning.Based on the error factors existing in the three parts of the positioning process,a new calculation method of train positioning error envelope is proposed.The upper and lower boundary envelope for the three parts of the positioning process are obtained by mathematical derivation and calculation of each type of the error respectively.[Result&Conclusion]The proposed method fully considers the error factors in train speed measuring,distance measuring and initial positioning,making the upper and lower boundary envelope of positioning errors more accurate and reducing the conservation in traditional positioning error calculations.Meanwhile,the proposed method can reach the safety level of SIL4,meet the safety requirements of virtual marshalling control system in train close chasing scenario,and further shorten the train chasing distance,improving transportation efficiency.
作者
范莹
温博为
王志卓
FAN Ying;WEN Bowei;WANG Zhizhuo(Traffic Control Technology Co.,Ltd.,100070,Beijing,China)
出处
《城市轨道交通研究》
北大核心
2024年第6期270-275,共6页
Urban Mass Transit
基金
北京市科技计划项目(Z231100003823027)。
关键词
轨道交通
列车定位
虚拟编组
定位误差
rail transit
virtual train marshalling
train positioning
positioning error
