空间多模冗余热备份嵌入式电子系统精确同步算法研究

On Precise Synchronizing Algorithm in Multi-Module Redundancy Embedded Electronic System of Aerospace

为了使空间嵌入式电子系统冗余的热备份多模之间获得精确时间同步,基于IEEE1588协议,在空间多模冗余热备份嵌入式电子系统的全交织网络基础上,采用FPGA/ASIC技术,结合软件和硬件同步提出了一种精确时间同步算法.该算法既有硬件同步的精度优势,又具有软件同步的成本优势和容错能力,并且时间同步精度可达到百纳秒量级,经过系统仿真验证了此算法的有效性.

In order to achieve precise synchronization among multimodule redundancy embedded elec tronic system of aerospace, this paper deals with the time synchronizing algorithm of the hot redundancy systems based on IEEE1588 protocol and FPGA（field programmable gate array）/ASIC（application spe cific integrated circuit） , which combines the software with the hardware. This method can achieve the same precision as the hardware synchronizing and owns the faulttolerant ability. The time synchronization precision of this algorithm is at hundreds of nanoseconds, and the algorithm is validated by system simula tion.