双总线结构工业控制计算机网性能指标评估

Modeling and Performance Analysis of Dual -bus Industrial Control Computer Networks

对双总线结构工业控制计算机网,给出了其Petri网和高级Petri网的建模及性能指标评估方法。文中考虑了信包缓冲区容量有限、信包最大允许服务时间有限、不同的站点优先级和系统总线故障率等因素影响下的网络性能指标评估问题。克服了以往对网络性能评估的某些局限。讨论了带计数禁止弧的高级随机Petri网(HDSPN)的特性.并对给出的DSPN模型进行了仿真计算,对影响网络性能的系统指标进行了讨论。

This paper presents the Petri nets and high level Petri nets by which modeling and performance indices'analysis method for dual - bus industrial control computer networks is prorosed. We consider several real network parameters, such as the finite buffers, finite network serving time, stations' priority and buses malfunction, which generaly determine the overall performance of a network. This algorithm overcomes the restriction that previous existed algorithms can not analyze the networks with finite buffers. We define a HDSPN with accountable inhibits arc and discusses its some performances. A simulation is given to show the application and effects of various parameters in dual - bus industrial control computer networks