摘要
为研究列控车载设备测速测距安全平台的同步表决技术,提出一种速度和距离的同步表决方法。以3个测速测距处理周期为任务组成循环队列,设计了软件任务级同步机制。设定差异限制条件来完成列车运行速度和走行距离的表决,根据表决结果在规定周期内判定单系的表决状态:当表决状态为初始化态时,赋初始值输出;当表决状态为故障态时,赋默认值输出;当表决状态为正常态或转换态时,分别采用内插和外推法、最小二乘拟合法和最大速度法表决输出。利用实验室测速测距平台,以列车运行过程中加速度变化点为研究对象,建立算法模型和仿真对比分析。研究结果表明:系统在任务级同步的基础上,利用表决条件能有效判定表决状态,提出的内插和外推表决输出算法能在满足安全需求条件基础上,得到精度更高的计算结果。
In order to study the synchronous voting technologies of speed and distance measurement safety platform for train control on-board equipment,a synchronous voting method of speed and distance is proposed.The software task level synchronization mechanism is designed by taking three speed and distance measurement treatment cycles as tasks to form a circular queue.The restrictions on differences are given to complete the voting of train running speed and distance,and the voting state of single system is determined within the specified period according to the voting results.The initial value is assigned to output when the voting is in initialization state.The default value is assigned to output when the voting is in fault state.Interpolation and extrapolation method,least square fitting method and maximum speed method are used to vote output respectively when the voting is in normal state or transition state.Taking the acceleration change point in the process of train operation as the research object,the algorithm model is established and simulation comparison analysis is conducted on the laboratory speed and distance measurement platform.Results show that the voting condition can be used to determine the voting state of the single system effectively based on the task level synchronization.The interpolation and extrapolation voting output method can obtain higher precision calculation results on the basis of meeting the security requirements.
作者
张淼
杨志杰
莫小凡
郑理华
ZHANG Miao;YANG Zhijie;MO Xiaofan;ZHENG Lihua(Postgraduate Department,China Academy of Railway Sciences,Beijing 100081,China;Signal and Communication Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Standards and Metrology Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《铁道标准设计》
北大核心
2022年第1期156-160,共5页
Railway Standard Design
基金
中国铁路总公司科技研究开发计划课题(N2018G022)
中国国家铁路集团有限公司科技研究开发计划课题(J2019G014)。
关键词
同步处理
数据表决
列控系统
车载设备
测速测距
二乘二取二
内插和外推
synchronous processing
data voting
train control system
on-board equipment
speed and distance measurement
double 2-vote-2
interpolation and extrapolation method
