基于微机实时网半实物仿真系统数据通讯研究

摘要

在半实物仿真系统中,仿真计算机与种类繁多的仿真设备间的实时数据通讯一直是困扰仿真工作者的难题.利用VMIC实时网卡广播中断以及高速率数据传输的特性,在VxWorks实时操作系统的软件环境下设计了从仿真机到三轴飞行模拟转台的半实物仿真实时数据传输方案.为了提高系统的实时性,减少通讯传输时延引起的滞后,采用实时广播中断技术,有效解决了仿真机与转台间时钟不同步问题,提高了半实物仿真系统的仿真实时性及仿真精度.试验结果表明改进的半实物仿真系统实时数据通讯方式满足实时通信的要求,为仿真系统的正确性提供保证.%Recently, along with the speeding development of the computer technique and the real-time operating system (RTOS), the PC technique is used in the Hardware-In-the-Loop (HIL) domain. In the HIL, there are simulating computers and kinds of simulating equipments. How to connect these equipments and improve the communicating qualities is a hard work to do. In this paper, the capabilities of broadcasting interrupt and transferring data in high speeding for VMIC real-time network card are imposed adequately. A method is made among simulating computers with three-axis simulators base on the VxWorks RTOS, to resolve the knot of clock synchronization and speed data transferring. The result of the experiment validates that this method can fulfill it.