TTP总线在分布式飞控计算机系统中的应用

TTP总线具有高确定性、低时延、容错支持等优点,在构建有硬实时需求的安全关键分布式容错系统中有较大优势。文章简要总结了飞控计算机系统对系统总线的需求,介绍了TTP总线分布式时钟同步与确定性通信技术,分析了TTP总线容错特性与安全性,设计了基于TTP总线的三余度分布式飞控计算机系统,测试验证了系统中的TTP总线同步精度、通信延迟与抖动、TTP总线对飞控功能的支持等,能够满足飞控计算机系统的通信需求。

Application of TTP in distributed flight control computer system

The TTP has the advantages of high certainty, low time delay, fault-tolerant support, etc, which has great advantages in building a safety-critical distributed fault-tolerant system with hard real-time requirements. This paper briefly summarized the flight control computer system for the demand of the system bus, introduced distributed clock synchronization and deterministic communication technology of the TTP, and analyzed the safety and fault tolerance features of TTP, then designed a distributed flight control computer system based on TTP. Lastly we tested and verified synchronous precision, communication delay and jitter, support for flight control by TTP in the system, which can meet the demand of flight control computer system of communication.