高速磁浮列车信号系统实时处理功能设计

Design of Real-time Processing Function of High-speed Maglev Train Signal System

高速磁浮列车控制对信号系统的响应时间提出了更高的要求,由于信号系统响应时间的提高会导致事件的处理时间缩短,致使一些事件无法被实时处理,而现有信号系统无法很好地解决此类问题。为在最不利的情况下所有事件都能被实时处理,文章提出了一种实时处理建模方法,其通过速率单调法分析一个周期内的负载能力,采用基于时钟驱动的任务调度算法来避免多事件同步触发对系统的影响。设计人员通过建模对信号系统进行实时性分析,并确定相关参数及性能指标,从而减少因事件分时处理不合理而出现的超时错误,避免将问题带入后期设计阶段。

High-speed maglev train control puts forward higher requirements on the response time of signal system.As the response time of signal system increases,the event processing time will be shortened,some events cannot be processed in real time,and the existing signal system cannot solve this problem well.In order to solve the problem that all events can be handled in real time under unfavorable conditions,this paper proposes a real-time processing modeling method,which analyzes the load capacity in a cycle through a rate monotone method,and adopts a clock driven task scheduling algorithm to avoid the impact of multi-event synchronous triggering on the system.Real-time performance of the signal system is analyzed through modeling,and then the relevant parameters and performance indicators are determined.This can reduce the timeout error caused by unreasonable timesharing of events and avoid bringing the problem into the later design stage.