分布式仿真系统实时性实现技术研究

Research on Implementation Technique of Distributed Real-time Simulation System

针对分布式仿真系统的结构和特点,阐述了计算实时性、通讯实时性和调度实时性3个方面影响系统仿真实时性的主要原因。对于计算实时性问题,提出基于扩展实时操作系统的多线程技术。对于通讯实时性问题,提出采用UDP协议和共享内存技术;对于调度实时性问题,提出采用硬件和软件同步结合的方法来实现时钟同步。通过实践表明,提出的方法是可行和有效的。

Aiming at framework and characteristics of distributed simulation system, the paper analyzes the main reasons of affecting simulation system real-time performance, such as computation real-time performance, communication real-time performance and scheduler real-time performance. Aiming at computation real-time performance problem, the multi-thread technique is put forward based on expanding real-time operating system. Aiming at communication real-time performance problem, the UDP protocol and memory sharing technique are put forward. Aiming at scheduling real-time performance problem, the hardware/software binding is put forward to implement clock synchronization. The practice results prove that the methods are feasible and valid.