基于PTPN 的多总线信息化综合系统通讯实时性建模.doc

文档介绍：基于PTPN的多总线信息化综合系统通讯实时性建模*
兰京川马敏黄建国
(电子科技大学自动化工程学院, 成都610054)
摘要:随着总线技术的发展, 基于多总线融合的信息化综合系统越来越受到人们的重视, 现已被应用于武器系统装备中。针对信息化综合系统的通讯实时性问题, 首先采用新型的抢占式时间Petri网对系统中多进程通讯过程进行建模与分析, 然后利用Petri网理论对模型进行分析, 评估其实时性, 根据评估结果设计通讯软件中进程的调度。最后, 通过一个基于CAN总线和VXI总线的信息化综合系统实例来验证进程调度的实时性。该方法能有效的避免死锁, 资源冲突和优先级翻转等不良现象, 使实时系统设计更科学化, 合理化。
关键词:信息化综合系统; 抢占式时间Petri网; CAN总线; VXI总线
中图分类号:TP202 文献标识码:A 国家标准学科分类代码:
Modeling munication real-time capability of multi-bus
information synthetic system based on PTPN
Lan Jingchuan Ma Min Huang Jianguo
(School of Automation Engineering of UESTC, Chengdu 610054, China)
Abstract: As the development of field bus technique, the Information Synthetic System based on multi-bus technologies has been paid more and more attention and used in weapon systems. Aiming at the problem of real time capability munication for multi-bus Information Synthetic System, the modeling approach using Preemptive for the multi-munication system is presented in the paper. The model is analyzed with the theory of , the model performance in real-time is assessed, and the software munication process scheduling is designed according to the results of the evaluation. Finally, the real-time process scheduling is verified through the example of Information Synthetic System based on CAN bus and VXI bus. The method can avoid the happening of deadlock, resource confliction and priority inver