并行分布实时仿真的高精度时间管理

High Precision Time Management in Parallel and Distributed Real-Time Simulations

并行分布实时仿真为复杂大规模的实时仿真提供了有效手段,实时仿真对于仿真时间的特殊要求,使得系统中的时钟同步成为系统研究的关键。如何实现系统的时钟管理,快速、稳定地获得高精度的同步时钟,是实时仿真系统面临的巨大挑战。在分析了获得时钟同步的一般方法基础上,进而研究了通用网络实时系统时钟同步的方法,提出了主动与被动同步方式;基于高速实时网络,提出了"类同源"时钟同步策略,各个节点的运行通过控制服务器统一实现,消除局部时钟影响,并分析了该同步策略所具有的优势。

Parallel and distributed real-time simulations is a good way to solve the real-time simulation problem for the large-scale complex systems.There is a special time requirement in the real-time simulation,so the research in the clock synchronization is an important topic.It is a great challenge to realize the time management to get high precision synchronization speedily and steadily.The basic methods to get clock synchronization were analyzed,and furthermore the clock synchronization for the real-time system,based on the general network,was researched,and the active and the passive methods were proposed.For the system using the high-speed real-time network,the quasi-homologous strategy was proposed,and the running of the nodes was controlled by the controlling servers to remove the influence of the local clock.The realization of the strategy and the advantage of the strategy were discussed.