基于DSPN的CAN总线通信行为建模与性能分析

目的分析CAN总线的通信协议，为改进和实践工程应用提供有价值的理论、方法．方法基于确定随机Petri网（DSPN），对其通信过程进行建模，通过仿真实验进行网络性能分析．结果得出信息到达间隔、通道忙概率、高优先级发送引起的受阻率与网络性能指标吞吐量和通信冲突率之间的关系．结论模型能够有效地描述和分析CAN总线的通信机制。为CAN总线组网提供有价值的参考．

USING DSPN for Modeling and Analysis Communication Behavior of CAN Fieldbus

This paper analyses the communication behavior of CAN based on event-triggered mechanism,which offers valuable direction in theory and technique for further improvement of the communication protocol and practice engineering application.In this paper,a detailed CAN communication behavior and DSPN(Deterministic and Stochastic Petri Net) model of CAN communication behavior is constructed.It analyses the network performance using simulate experiment and shows the relationship of arriving messages interval,the probability of busy channel,the suffocation probability causing high priority information sending with network performance parameter about throughput and the probability of communicate conflict.These results shows the DSPN Model can effectively describe and analyze the communication behavior of CAN Fieldbus system for engineers and researchers.