RTEthernet中改进的FTA时钟同步算法研究.

In view of the problems that node clock drift， network link delay and poor synchronization ability in Ethernet， this paper constructs a clock synchronization system model based on the communication principle of RTEthernet protocol. By studying the composition and working principle of RTEthernet， three factors affecting the time synchronization precision of real-time Ethernet-drift rate， network transmission delay and clock Byzantine fault are considered. Based on this， the original FTA clock synchronization algorithm is analyzed， and it is found that its fault tolerance performance is obviously reduced when Byzantine faults increase. The idea of "median fault tolerance" is introduced to improve it and RTE-FTM algorithm is proposed. Through the CANoe simulation platform， two Byzantine faults and no Byzantine faults in the system （seven nodes） are compared and analyzed， and the precision loss rate of the system is reduced by 3.1%， which verifies the convergence and effectiveness of the algorithm. [ABSTRACT FROM AUTHOR]