| 袁熹,刘朝晖,吴志强,韩文兴.一种CANbus动态优先级策略的研究与仿真[J].南华大学学报(自然科学版),2015,29(2):97~101, 107.[YUAN Xi,LIU Zhao-hui,WU Zhi-qiang,HAN Wen-xing.Study and Simulation of a New Dynamic Priority Strategy of CAN[J].Journal of University of South China(Science and Technology),2015,29(2):97~101, 107.] |
| 一种CANbus动态优先级策略的研究与仿真 |
| Study and Simulation of a New Dynamic Priority Strategy of CAN |
| 投稿时间：2014-12-15 |
| DOI： |
| 中文关键词: 优先级 CAN总线 调度策略 仿真 |
| 英文关键词:priority CAN scheduling algorithm simulation |
| 基金项目: |
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| 中文摘要: |
| 在通信确定性要求相对较高的系统中,若采用静态优先级调度策略,优先级低的节点可能长时间竞争不到总线,从而导致信息得不到发送.为了克服静态优先级的这种缺陷,可以提出一种新的动态优先级调度策略:以固定的周期遍历每个节点,并根据每个节点获得总线仲裁的频率来动态调整优先级.与此同时,每个节点调度的预值区间和阀值可根据需要灵活设定.通过Matlab对原始CANbus的静态优先级调度策略和本动态调度策略进行仿真对比研究,本策略的可行性即可获得验证.通信的确定性亦可得到保证. |
| 英文摘要: |
| In the system requiring comparatively higher deterministic of communication,static priority scheduling algorithm may bring about that the nodes of lower priority fail to access to the bus within a long period,which leads to a result that some data couldn’t be sent.To overcome this defect,a new dynamic priority scheduling strategy is put forward:Traverse each node periodically and then adjust the priority of each node dynamically as per its bus arbitrary frequency.In the meantime,the pre-value interval and threshold of each node could be flexibly specified as required.Once the emulational comparison between the original CANbus static priority scheduling strategy and this new dynamic strategy is proceeded,the feasibility of the latter approach would be verified.The deterministic of communication would be guaranteed as well. |
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