摘要
为了研究车路协同系统的仿真关键技术并构建车路协同系统仿真平台,针对车路协同系统仿真平台中的联邦成员间实时性问题,提出基于PTP(precision timing protocol)协议的高精度仿真主动时钟同步方法。讨论车路协同仿真联邦中各个联邦成员的时间管理策略,并基于时钟同步方法测试2种信息交互策略下的系统延时,提出车路协同系统的信息交互改进策略。仿真测试结果表明:平均同步时钟误差为5.69μs,有效解决了各个联邦成员间的时钟同步问题;仿真系统中1级和2级系统从节点平均仿真延迟为0.77,1.02 ms,较好满足车路协同系统仿真需求。
In order to research the key technology on the intelligent vehicle infrastructure cooperative systems (IVICS) simulation and build the simulation platform, high level architecture (HLA)-based simulation framework for IVICS was designed. In view of system demand of real-time capabilities in simulation, a precision timing protocol (PPT) protocol-based highly accurate simulation clock synchronization was designed. Time management strategy for federates was discussed and system delay under two information interaction strategy was tested based on clock synchronization. Then an improved method was proposed. The results show that the average synchronization clock error is 5.69μs, and that the average simulation delay from slaver nodes of both level 1 and level 2 system is 0.77 and 1.02 ms respectively, which indicate that the method can effectively resolve clock synchronization problems, and satisfy the requirement of IVICS simulation.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第10期3944-3953,共10页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(61104162
61273089
61490705)
北京市高等学校"青年英才计划"(YETP0538)项目
国际科技合作计划项目(2014DFA80260)~~
关键词
交通工程
车路协同系统
高层体系架构
精确时钟同步协议
实时性
traffic engineering
intelligent vehicle infrastructure cooperative systems(IVICS)
high level architecture(HLA)
precision timing protocol(PTP)
real-time capabilities
