分布式实时仿真系统高精度时间同步技术研究

在采用PC机和Windows操作系统的局域网上用软硬件相结合的方式实现高精度、高效率的时间同步是提高分布式实时仿真系统置信度、降低系统硬件成本的关键。给出了一种局域网时间对齐（LTS）算法和一种基于PC机自身资源的时钟构造方法。LTS算法在局域网环境下比目前广泛使用的NTP(网络时间协议)算法有更好的时间对齐效果，新时钟在性能上远远优于Windows系统时钟。最后设计了一个完整的时间同步方案，该方案达到了高精度、高效率时间同步和降低硬件成本的目的。

Study on technique of high time coherence used in real-time distributed interactive simulation

In LAN which use PC and Windows operating system, accurate and effective time coherence using the pattern that software cooperate with hardware is one of the keys for real-time distributed interactive simulation system to improve fidelity and decrease cost. A brief time synchronization algorithms in LAN (LTS algorithms) was bring forward,and a new clock was designed based on resource of PC. In LAN, LTS algorithms has better time adjust effect. The new clock is better than the system clock of Windows operating system in performance. At last, a integrated scheme of time coherence was designed,and the purpose to get accurate and effective time coherence and to decrease cost was realized.