摘要
网络通信系统是现代航空电子系统以及其他分布式实时容错系统的中枢,基于时间触发架构的网络通信系统是一个重要的发展方向;首先对于TTP/C协议的基本架构以及上电群启动过程,全局时钟同步,容错策略等关键技术进行介绍,然后提出一种基于TTP的时间触发总线协议,并基于DSP实现协议控制器进行时间触发通讯;结果表明时间触发总线具有良好的时间确定性,容错特性以及较高的总线利用率,适用于航空,铁路,汽车等安全关键系统的底层网络通信。
The communication network system is the key technology to the avionics system and other distributed real-time fault-toler- ant systems, and the communication network systems based on Time-Triggered Architecture indicate an important upgrade direction. It firstly introduces the basic structure of TTP/C, and the key technologies like start-up process, global time synchronization, fault-tolerant strategy. Then introduces a simplified time-triggered protocol based on TTP/C, and implements the protocol controller on DSP to realize the time-triggered communication. The results show that time-triggered protocol is quite a suitable communication network system for the avionics system, railway system, automotive system and other safety-critical system with its time determinability, fault-tolerant strategy and higher bus utilization rate.
出处
《计算机测量与控制》
2016年第8期209-211,217,共4页
Computer Measurement &Control
关键词
时间触发
时钟同步
容错策略
时间确定性
time- triggered
time synchronization
fault-tolerant strategy
time determinability
